diff --git a/sprout/algorithm/fixed/partition_copy.hpp b/sprout/algorithm/fixed/partition_copy.hpp
index b7659ce0..1a2b2c4f 100644
--- a/sprout/algorithm/fixed/partition_copy.hpp
+++ b/sprout/algorithm/fixed/partition_copy.hpp
@@ -1,11 +1,12 @@
 #ifndef SPROUT_ALGORITHM_FIXED_PARTITION_COPY_HPP
 #define SPROUT_ALGORITHM_FIXED_PARTITION_COPY_HPP
 
+#include <cstddef>
 #include <type_traits>
 #include <sprout/config.hpp>
 #include <sprout/fixed_container/traits.hpp>
 #include <sprout/fixed_container/functions.hpp>
-#include <sprout/iterator/operation.hpp>
+#include <sprout/iterator/operation.hpp>
 #include <sprout/algorithm/fixed/result_of.hpp>
 
 namespace sprout {
@@ -61,7 +62,7 @@ namespace sprout {
 				Args const&... args
 				)
 			{
-				return first != last && sizeof...(Args) < offset
+				return first != last && sizeof...(Args) < static_cast<std::size_t>(offset)
 					? pred(*first)
 						? partition_copy_impl_2(sprout::next(first), last, result, pred, offset, *first, args...)
 						: partition_copy_impl_2(sprout::next(first), last, result, pred, offset, args..., *first)
@@ -96,7 +97,7 @@ namespace sprout {
 				Args const&... args
 				)
 			{
-				return sizeof...(Args) < offset
+				return sizeof...(Args) < static_cast<std::size_t>(offset)
 					? partition_copy_impl_1(first, last, result, pred, offset, args..., *sprout::next(sprout::fixed_begin(result), sizeof...(Args)))
 					: partition_copy_impl_2(first, last, result, pred, offset + sprout::size(result), args...)
 					;
diff --git a/sprout/algorithm/fixed/remove_copy.hpp b/sprout/algorithm/fixed/remove_copy.hpp
index a3688814..f878aff9 100644
--- a/sprout/algorithm/fixed/remove_copy.hpp
+++ b/sprout/algorithm/fixed/remove_copy.hpp
@@ -1,11 +1,12 @@
 #ifndef SPROUT_ALGORITHM_FIXED_REMOVE_COPY_HPP
 #define SPROUT_ALGORITHM_FIXED_REMOVE_COPY_HPP
 
+#include <cstddef>
 #include <type_traits>
 #include <sprout/config.hpp>
 #include <sprout/fixed_container/traits.hpp>
 #include <sprout/fixed_container/functions.hpp>
-#include <sprout/iterator/operation.hpp>
+#include <sprout/iterator/operation.hpp>
 #include <sprout/algorithm/fixed/result_of.hpp>
 
 namespace sprout {
@@ -61,7 +62,7 @@ namespace sprout {
 				Args const&... args
 				)
 			{
-				return first != last && sizeof...(Args) < offset
+				return first != last && sizeof...(Args) < static_cast<std::size_t>(offset)
 					? *first == value
 						? remove_copy_impl_2(sprout::next(first), last, result, value, offset, args...)
 						: remove_copy_impl_2(sprout::next(first), last, result, value, offset, args..., *first)
@@ -96,7 +97,7 @@ namespace sprout {
 				Args const&... args
 				)
 			{
-				return sizeof...(Args) < offset
+				return sizeof...(Args) < static_cast<std::size_t>(offset)
 					? remove_copy_impl_1(first, last, result, value, offset, args..., *sprout::next(sprout::fixed_begin(result), sizeof...(Args)))
 					: remove_copy_impl_2(first, last, result, value, offset + sprout::size(result), args...)
 					;
diff --git a/sprout/algorithm/fixed/remove_copy_if.hpp b/sprout/algorithm/fixed/remove_copy_if.hpp
index 74479257..8aeaaa33 100644
--- a/sprout/algorithm/fixed/remove_copy_if.hpp
+++ b/sprout/algorithm/fixed/remove_copy_if.hpp
@@ -1,11 +1,12 @@
 #ifndef SPROUT_ALGORITHM_FIXED_REMOVE_COPY_IF_HPP
 #define SPROUT_ALGORITHM_FIXED_REMOVE_COPY_IF_HPP
 
+#include <cstddef>
 #include <type_traits>
 #include <sprout/config.hpp>
 #include <sprout/fixed_container/traits.hpp>
 #include <sprout/fixed_container/functions.hpp>
-#include <sprout/iterator/operation.hpp>
+#include <sprout/iterator/operation.hpp>
 #include <sprout/algorithm/fixed/result_of.hpp>
 
 namespace sprout {
@@ -61,7 +62,7 @@ namespace sprout {
 				Args const&... args
 				)
 			{
-				return first != last && sizeof...(Args) < offset
+				return first != last && sizeof...(Args) < static_cast<std::size_t>(offset)
 					? pred(*first)
 						? remove_copy_if_impl_2(sprout::next(first), last, result, pred, offset, args...)
 						: remove_copy_if_impl_2(sprout::next(first), last, result, pred, offset, args..., *first)
@@ -96,7 +97,7 @@ namespace sprout {
 				Args const&... args
 				)
 			{
-				return sizeof...(Args) < offset
+				return sizeof...(Args) < static_cast<std::size_t>(offset)
 					? remove_copy_if_impl_1(first, last, result, pred, offset, args..., *sprout::next(sprout::fixed_begin(result), sizeof...(Args)))
 					: remove_copy_if_impl_2(first, last, result, pred, offset + sprout::size(result), args...)
 					;
diff --git a/sprout/algorithm/fixed/replace_copy.hpp b/sprout/algorithm/fixed/replace_copy.hpp
index 0a51f9ce..badf6ce3 100644
--- a/sprout/algorithm/fixed/replace_copy.hpp
+++ b/sprout/algorithm/fixed/replace_copy.hpp
@@ -11,6 +11,7 @@
 #include <sprout/iterator/operation.hpp>
 #include <sprout/algorithm/fixed/result_of.hpp>
 #include HDR_ITERATOR_SSCRISK_CEL_OR_SPROUT_DETAIL
+#include HDR_FUNCTIONAL_SSCRISK_CEL_OR_SPROUT_DETAIL
 
 namespace sprout {
 	namespace fixed {
@@ -32,7 +33,7 @@ namespace sprout {
 					result,
 					sprout::size(result),
 					(Indexes >= offset && Indexes < offset + size && Indexes < offset + input_size
-						? *sprout::next(first, Indexes - offset) == old_value ? new_value : *sprout::next(first, Indexes - offset)
+						? NS_SSCRISK_CEL_OR_SPROUT_DETAIL::equal_to<T>()(*sprout::next(first, Indexes - offset), old_value) ? new_value : *sprout::next(first, Indexes - offset)
 						: *sprout::next(sprout::fixed_begin(result), Indexes)
 						)...
 					);
diff --git a/sprout/algorithm/fixed/sort.hpp b/sprout/algorithm/fixed/sort.hpp
index bd935201..bf3f44d7 100644
--- a/sprout/algorithm/fixed/sort.hpp
+++ b/sprout/algorithm/fixed/sort.hpp
@@ -14,6 +14,24 @@
 namespace sprout {
 	namespace fixed {
 		namespace detail {
+			template<typename Container, typename Compare>
+			SPROUT_CONSTEXPR inline typename sprout::fixed::result_of::algorithm<Container>::type sort_lr(
+				Container const& cont,
+				typename sprout::fixed_container_traits<Container>::difference_type start,
+				typename sprout::fixed_container_traits<Container>::difference_type end,
+				Compare comp,
+				typename sprout::fixed_container_traits<Container>::difference_type l,
+				typename sprout::fixed_container_traits<Container>::difference_type r,
+				typename sprout::fixed_container_traits<Container>::value_type const& p
+				);
+			template<typename Container, typename Compare>
+			SPROUT_CONSTEXPR inline typename sprout::fixed::result_of::algorithm<Container>::type sort_start(
+				Container const& cont,
+				typename sprout::fixed_container_traits<Container>::difference_type start,
+				typename sprout::fixed_container_traits<Container>::difference_type end,
+				Compare comp
+				);
+
 			template<typename Container, typename Iterator>
 			SPROUT_CONSTEXPR inline typename sprout::fixed_container_traits<Container>::value_type const& sort_select_pivot(
 				Iterator origin,
@@ -128,64 +146,80 @@ namespace sprout {
 			{	// pivot を選択してソートを開始
 				return sort_lr(cont, start, end, comp, start, end, sort_select_pivot<Container>(sprout::fixed_begin(cont), start, end));
 			}
+			template<typename Container, typename Compare>
+			SPROUT_CONSTEXPR inline typename std::enable_if<
+				(sprout::fixed_container_traits<Container>::fixed_size <= 1),
+				typename sprout::fixed::result_of::algorithm<Container>::type
+			>::type sort(
+				Container const& cont,
+				Compare comp
+				)
+			{
+				return sprout::clone(cont);
+			}
+			template<typename Container, typename Compare>
+			SPROUT_CONSTEXPR inline typename std::enable_if<
+				(sprout::fixed_container_traits<Container>::fixed_size > 1),
+				typename sprout::fixed::result_of::algorithm<Container>::type
+			>::type sort(
+				Container const& cont,
+				Compare comp
+				)
+			{
+				return sprout::fixed::detail::sort_start(
+					cont,
+					sprout::fixed_begin_offset(cont),
+					NS_SSCRISK_CEL_OR_SPROUT_DETAIL::distance(sprout::fixed_begin(cont), sprout::end(cont) - 1),
+					comp
+					);
+			}
+			template<typename Container>
+			SPROUT_CONSTEXPR inline typename std::enable_if<
+				(sprout::fixed_container_traits<Container>::fixed_size <= 1),
+				typename sprout::fixed::result_of::algorithm<Container>::type
+			>::type sort(
+				Container const& cont
+				)
+			{
+				return sprout::clone(cont);
+			}
+			template<typename Container>
+			SPROUT_CONSTEXPR inline typename std::enable_if<
+				(sprout::fixed_container_traits<Container>::fixed_size > 1),
+				typename sprout::fixed::result_of::algorithm<Container>::type
+			>::type sort(
+				Container const& cont
+				)
+			{
+				return sprout::fixed::detail::sort_start(
+					cont,
+					sprout::fixed_begin_offset(cont),
+					NS_SSCRISK_CEL_OR_SPROUT_DETAIL::distance(sprout::fixed_begin(cont), sprout::end(cont) - 1),
+					NS_SSCRISK_CEL_OR_SPROUT_DETAIL::less<typename sprout::fixed_container_traits<Container>::value_type>()
+					);
+			}
 		}	// namespace detail
 		//
+
 		// sort
 		//
 		template<typename Container, typename Compare>
-		SPROUT_CONSTEXPR inline typename std::enable_if<
-			(sprout::fixed_container_traits<Container>::fixed_size <= 1),
-			typename sprout::fixed::result_of::algorithm<Container>::type
-		>::type sort(
+		SPROUT_CONSTEXPR inline typename sprout::fixed::result_of::algorithm<Container>::type sort(
 			Container const& cont,
 			Compare comp
 			)
 		{
-			return sprout::clone(cont);
-		}
-		template<typename Container, typename Compare>
-		SPROUT_CONSTEXPR inline typename std::enable_if<
-			(sprout::fixed_container_traits<Container>::fixed_size > 1),
-			typename sprout::fixed::result_of::algorithm<Container>::type
-		>::type sort(
-			Container const& cont,
-			Compare comp
-			)
-		{
-			return sprout::fixed::detail::sort_start(
-				cont,
-				sprout::fixed_begin_offset(cont),
-				NS_SSCRISK_CEL_OR_SPROUT_DETAIL::distance(sprout::fixed_begin(cont), sprout::end(cont) - 1),
-				comp
-				);
+			return sprout::fixed::detail::sort(cont, comp);
 		}
 		//
 		// sort
 		//
 		template<typename Container>
-		SPROUT_CONSTEXPR inline typename std::enable_if<
-			(sprout::fixed_container_traits<Container>::fixed_size <= 1),
-			typename sprout::fixed::result_of::algorithm<Container>::type
-		>::type sort(
+		SPROUT_CONSTEXPR inline typename sprout::fixed::result_of::algorithm<Container>::type sort(
 			Container const& cont
 			)
 		{
-			return sprout::clone(cont);
-		}
-		template<typename Container>
-		SPROUT_CONSTEXPR inline typename std::enable_if<
-			(sprout::fixed_container_traits<Container>::fixed_size > 1),
-			typename sprout::fixed::result_of::algorithm<Container>::type
-		>::type sort(
-			Container const& cont
-			)
-		{
-			return sprout::fixed::detail::sort_start(
-				cont,
-				sprout::fixed_begin_offset(cont),
-				NS_SSCRISK_CEL_OR_SPROUT_DETAIL::distance(sprout::fixed_begin(cont), sprout::end(cont) - 1),
-				NS_SSCRISK_CEL_OR_SPROUT_DETAIL::less<typename sprout::fixed_container_traits<Container>::value_type>()
-				);
+			return sprout::fixed::detail::sort(cont);
 		}
 	}	// namespace fixed
 
diff --git a/sprout/algorithm/fixed/stable_partition_copy.hpp b/sprout/algorithm/fixed/stable_partition_copy.hpp
index 172e7e6d..09f297c5 100644
--- a/sprout/algorithm/fixed/stable_partition_copy.hpp
+++ b/sprout/algorithm/fixed/stable_partition_copy.hpp
@@ -1,11 +1,12 @@
 #ifndef SPROUT_ALGORITHM_FIXED_STABLE_PARTITION_COPY_HPP
 #define SPROUT_ALGORITHM_FIXED_STABLE_PARTITION_COPY_HPP
 
+#include <cstddef>
 #include <type_traits>
 #include <sprout/config.hpp>
 #include <sprout/fixed_container/traits.hpp>
 #include <sprout/fixed_container/functions.hpp>
-#include <sprout/iterator/operation.hpp>
+#include <sprout/iterator/operation.hpp>
 #include <sprout/algorithm/fixed/result_of.hpp>
 
 namespace sprout {
@@ -34,13 +35,13 @@ namespace sprout {
 				return stable_partition_copy_impl_4(result, args..., *sprout::next(sprout::fixed_begin(result), sizeof...(Args)));
 			}
 
-			template<typename InputIterator, typename Result, typename Predicate, typename... Args>
+			template<typename BidirectionalIterator, typename Result, typename Predicate, typename... Args>
 			SPROUT_CONSTEXPR inline typename std::enable_if<
 				sprout::fixed_container_traits<Result>::fixed_size == sizeof...(Args),
 				typename sprout::fixed::result_of::algorithm<Result>::type
 			>::type stable_partition_copy_impl_3(
-				InputIterator first,
-				InputIterator last,
+				BidirectionalIterator first,
+				BidirectionalIterator last,
 				Result const& result,
 				Predicate pred,
 				typename sprout::fixed_container_traits<Result>::difference_type offset,
@@ -49,20 +50,20 @@ namespace sprout {
 			{
 				return sprout::remake_clone<Result, Result>(result, sprout::size(result), args...);
 			}
-			template<typename InputIterator, typename Result, typename Predicate, typename... Args>
+			template<typename BidirectionalIterator, typename Result, typename Predicate, typename... Args>
 			SPROUT_CONSTEXPR inline typename std::enable_if<
 				sprout::fixed_container_traits<Result>::fixed_size != sizeof...(Args),
 				typename sprout::fixed::result_of::algorithm<Result>::type
 			>::type stable_partition_copy_impl_3(
-				InputIterator first,
-				InputIterator last,
+				BidirectionalIterator first,
+				BidirectionalIterator last,
 				Result const& result,
 				Predicate pred,
 				typename sprout::fixed_container_traits<Result>::difference_type offset,
 				Args const&... args
 				)
 			{
-				return first != last && sizeof...(Args) < offset
+				return first != last && sizeof...(Args) < static_cast<std::size_t>(offset)
 					? !pred(*first)
 						? stable_partition_copy_impl_3(sprout::next(first), last, result, pred, offset, args..., *first)
 						: stable_partition_copy_impl_3(sprout::next(first), last, result, pred, offset, args...)
@@ -70,82 +71,82 @@ namespace sprout {
 					;
 			}
 
-			template<typename InputIterator, typename Result, typename Predicate, typename... Args>
+			template<typename BidirectionalIterator, typename Result, typename Predicate, typename... Args>
 			SPROUT_CONSTEXPR inline typename std::enable_if<
 				sprout::fixed_container_traits<Result>::fixed_size == sizeof...(Args),
 				typename sprout::fixed::result_of::algorithm<Result>::type
 			>::type stable_partition_copy_impl_2(
-				InputIterator first,
-				InputIterator last,
+				BidirectionalIterator first,
+				BidirectionalIterator last,
 				Result const& result,
 				Predicate pred,
 				typename sprout::fixed_container_traits<Result>::difference_type offset,
-				InputIterator origin,
+				BidirectionalIterator origin,
 				Args const&... args
 				)
 			{
 				return sprout::remake_clone<Result, Result>(result, sprout::size(result), args...);
 			}
-			template<typename InputIterator, typename Result, typename Predicate, typename... Args>
+			template<typename BidirectionalIterator, typename Result, typename Predicate, typename... Args>
 			SPROUT_CONSTEXPR inline typename std::enable_if<
 				sprout::fixed_container_traits<Result>::fixed_size != sizeof...(Args),
 				typename sprout::fixed::result_of::algorithm<Result>::type
 			>::type stable_partition_copy_impl_2(
-				InputIterator first,
-				InputIterator last,
+				BidirectionalIterator first,
+				BidirectionalIterator last,
 				Result const& result,
 				Predicate pred,
 				typename sprout::fixed_container_traits<Result>::difference_type offset,
-				InputIterator origin,
+				BidirectionalIterator origin,
 				Args const&... args
 				)
 			{
-				return first != last && sizeof...(Args) < offset
+				return first != last && sizeof...(Args) < static_cast<std::size_t>(offset)
 					? pred(*first)
 						? stable_partition_copy_impl_2(sprout::next(first), last, result, pred, offset, origin, args..., *first)
 						: stable_partition_copy_impl_2(sprout::next(first), last, result, pred, offset, origin, args...)
 					: stable_partition_copy_impl_3(origin, last, result, pred, offset, args...)
 					;
 			}
-			template<typename InputIterator, typename Result, typename Predicate, typename... Args>
+			template<typename BidirectionalIterator, typename Result, typename Predicate, typename... Args>
 			SPROUT_CONSTEXPR inline typename std::enable_if<
 				sprout::fixed_container_traits<Result>::fixed_size == sizeof...(Args),
 				typename sprout::fixed::result_of::algorithm<Result>::type
 			>::type stable_partition_copy_impl_1(
-				InputIterator first,
-				InputIterator last,
+				BidirectionalIterator first,
+				BidirectionalIterator last,
 				Result const& result,
 				Predicate pred,
 				typename sprout::fixed_container_traits<Result>::difference_type offset,
-				InputIterator origin,
+				BidirectionalIterator origin,
 				Args const&... args
 				)
 			{
 				return sprout::remake_clone<Result, Result>(result, sprout::size(result), args...);
 			}
-			template<typename InputIterator, typename Result, typename Predicate, typename... Args>
+			template<typename BidirectionalIterator, typename Result, typename Predicate, typename... Args>
 			SPROUT_CONSTEXPR inline typename std::enable_if<
 				sprout::fixed_container_traits<Result>::fixed_size != sizeof...(Args),
 				typename sprout::fixed::result_of::algorithm<Result>::type
 			>::type stable_partition_copy_impl_1(
-				InputIterator first,
-				InputIterator last,
+				BidirectionalIterator first,
+				BidirectionalIterator last,
 				Result const& result,
 				Predicate pred,
 				typename sprout::fixed_container_traits<Result>::difference_type offset,
-				InputIterator origin,
+				BidirectionalIterator origin,
 				Args const&... args
 				)
 			{
-				return sizeof...(Args) < offset
+				return sizeof...(Args) < static_cast<std::size_t>(offset)
 					? stable_partition_copy_impl_1(first, last, result, pred, offset, origin, args..., *sprout::next(sprout::fixed_begin(result), sizeof...(Args)))
 					: stable_partition_copy_impl_2(first, last, result, pred, offset + sprout::size(result), origin, args...)
 					;
 			}
-			template<typename InputIterator, typename Result, typename Predicate>
+			template<typename BidirectionalIterator, typename Result, typename Predicate>
 			SPROUT_CONSTEXPR inline typename sprout::fixed::result_of::algorithm<Result>::type stable_partition_copy_impl(
-				InputIterator first,
-				InputIterator last,
+				BidirectionalIterator first,
+				BidirectionalIterator last,
 				Result const& result,
 				Predicate pred
 				)
@@ -156,10 +157,10 @@ namespace sprout {
 		//
 		// stable_partition_copy
 		//
-		template<typename InputIterator, typename Result, typename Predicate>
+		template<typename BidirectionalIterator, typename Result, typename Predicate>
 		SPROUT_CONSTEXPR inline typename sprout::fixed::result_of::algorithm<Result>::type stable_partition_copy(
-			InputIterator first,
-			InputIterator last,
+			BidirectionalIterator first,
+			BidirectionalIterator last,
 			Result const& result,
 			Predicate pred
 			)
diff --git a/sprout/algorithm/fixed/stable_sort.hpp b/sprout/algorithm/fixed/stable_sort.hpp
index ddc8df39..371ed858 100644
--- a/sprout/algorithm/fixed/stable_sort.hpp
+++ b/sprout/algorithm/fixed/stable_sort.hpp
@@ -198,62 +198,77 @@ namespace sprout {
 			{
 				return stable_sort_impl_1(cont, comp, sprout::index_tuple<Indexes...>(), sprout::index_tuple<>(), sprout::index_tuple<>(), sprout::index_tuple<>());
 			}
+			template<typename Container, typename Compare>
+			SPROUT_CONSTEXPR inline typename std::enable_if<
+				(sprout::fixed_container_traits<Container>::fixed_size <= 1),
+				typename sprout::fixed::result_of::algorithm<Container>::type
+			>::type stable_sort(
+				Container const& cont,
+				Compare comp
+				)
+			{
+				return sprout::clone(cont);
+			}
+			template<typename Container, typename Compare>
+			SPROUT_CONSTEXPR inline typename std::enable_if<
+				(sprout::fixed_container_traits<Container>::fixed_size > 1),
+				typename sprout::fixed::result_of::algorithm<Container>::type
+			>::type stable_sort(
+				Container const& cont,
+				Compare comp
+				)
+			{
+				return sprout::fixed::detail::stable_sort_impl(
+					cont,
+					comp,
+					typename sprout::index_range<0, sprout::fixed_container_traits<Container>::fixed_size>::type()
+					);
+			}
+			template<typename Container>
+			SPROUT_CONSTEXPR inline typename std::enable_if<
+				(sprout::fixed_container_traits<Container>::fixed_size <= 1),
+				typename sprout::fixed::result_of::algorithm<Container>::type
+			>::type stable_sort(
+				Container const& cont
+				)
+			{
+				return sprout::clone(cont);
+			}
+			template<typename Container>
+			SPROUT_CONSTEXPR inline typename std::enable_if<
+				(sprout::fixed_container_traits<Container>::fixed_size > 1),
+				typename sprout::fixed::result_of::algorithm<Container>::type
+			>::type stable_sort(
+				Container const& cont
+				)
+			{
+				return sprout::fixed::detail::stable_sort_impl(
+					cont,
+					NS_SSCRISK_CEL_OR_SPROUT_DETAIL::less<typename sprout::fixed_container_traits<Container>::value_type>(),
+					typename sprout::index_range<0, sprout::fixed_container_traits<Container>::fixed_size>::type()
+					);
+			}
 		}	// namespace detail
 		//
 		// stable_sort
 		//
 		template<typename Container, typename Compare>
-		SPROUT_CONSTEXPR inline typename std::enable_if<
-			(sprout::fixed_container_traits<Container>::fixed_size <= 1),
-			typename sprout::fixed::result_of::algorithm<Container>::type
-		>::type stable_sort(
+		SPROUT_CONSTEXPR inline typename sprout::fixed::result_of::algorithm<Container>::type stable_sort(
 			Container const& cont,
 			Compare comp
 			)
 		{
-			return sprout::clone(cont);
-		}
-		template<typename Container, typename Compare>
-		SPROUT_CONSTEXPR inline typename std::enable_if<
-			(sprout::fixed_container_traits<Container>::fixed_size > 1),
-			typename sprout::fixed::result_of::algorithm<Container>::type
-		>::type stable_sort(
-			Container const& cont,
-			Compare comp
-			)
-		{
-			return sprout::fixed::detail::stable_sort_impl(
-				cont,
-				comp,
-				typename sprout::index_range<0, sprout::fixed_container_traits<Container>::fixed_size>::type()
-				);
+			return sprout::fixed::detail::stable_sort(cont, comp);
 		}
 		//
 		// stable_sort
 		//
 		template<typename Container>
-		SPROUT_CONSTEXPR inline typename std::enable_if<
-			(sprout::fixed_container_traits<Container>::fixed_size <= 1),
-			typename sprout::fixed::result_of::algorithm<Container>::type
-		>::type stable_sort(
-			Container const& cont
-			)
-		{
-			return sprout::clone(cont);
-		}
-		template<typename Container>
-		SPROUT_CONSTEXPR inline typename std::enable_if<
-			(sprout::fixed_container_traits<Container>::fixed_size > 1),
-			typename sprout::fixed::result_of::algorithm<Container>::type
-		>::type stable_sort(
+		SPROUT_CONSTEXPR inline typename sprout::fixed::result_of::algorithm<Container>::type stable_sort(
 			Container const& cont
 			)
 		{
-			return sprout::fixed::detail::stable_sort_impl(
-				cont,
-				NS_SSCRISK_CEL_OR_SPROUT_DETAIL::less<typename sprout::fixed_container_traits<Container>::value_type>(),
-				typename sprout::index_range<0, sprout::fixed_container_traits<Container>::fixed_size>::type()
-				);
+			return sprout::fixed::detail::stable_sort(cont);
 		}
 	}	// namespace fixed
 
diff --git a/sprout/algorithm/fixed/unique_copy.hpp b/sprout/algorithm/fixed/unique_copy.hpp
index 42b1bb34..5070008d 100644
--- a/sprout/algorithm/fixed/unique_copy.hpp
+++ b/sprout/algorithm/fixed/unique_copy.hpp
@@ -1,11 +1,12 @@
 #ifndef SPROUT_ALGORITHM_FIXED_UNIQUE_COPY_HPP
 #define SPROUT_ALGORITHM_FIXED_UNIQUE_COPY_HPP
 
+#include <cstddef>
 #include <type_traits>
 #include <sprout/config.hpp>
 #include <sprout/fixed_container/traits.hpp>
 #include <sprout/fixed_container/functions.hpp>
-#include <sprout/iterator/operation.hpp>
+#include <sprout/iterator/operation.hpp>
 #include <sprout/algorithm/fixed/result_of.hpp>
 
 namespace sprout {
@@ -46,7 +47,7 @@ namespace sprout {
 				Args const&... args
 				)
 			{
-				return sprout::remake_clone<Result, Result>(result, sprout::size(result), args...);
+				return sprout::remake_clone<Result, Result>(result, sprout::size(result), args..., head);
 			}
 			template<typename InputIterator, typename Result, typename Head, typename... Args>
 			SPROUT_CONSTEXPR inline typename std::enable_if<
@@ -61,7 +62,7 @@ namespace sprout {
 				Args const&... args
 				)
 			{
-				return first != last && sizeof...(Args) + 1 < offset
+				return first != last && sizeof...(Args) + 1 < static_cast<std::size_t>(offset)
 					? !(head == *first)
 						? unique_copy_impl_2(sprout::next(first), last, result, offset, *first, args..., head)
 						: unique_copy_impl_2(sprout::next(first), last, result, offset, head, args...)
@@ -94,9 +95,11 @@ namespace sprout {
 				Args const&... args
 				)
 			{
-				return sizeof...(Args) < offset
+				return sizeof...(Args) < static_cast<std::size_t>(offset)
 					? unique_copy_impl_1(first, last, result, offset, args..., *(sprout::fixed_begin(result) + sizeof...(Args)))
-					: unique_copy_impl_2(sprout::next(first), last, result, offset + sprout::size(result), *first, args...)
+					: first != last
+						? unique_copy_impl_2(sprout::next(first), last, result, offset + sprout::size(result), *first, args...)
+						: unique_copy_impl_3(result, args...)
 					;
 			}
 			template<typename InputIterator, typename Result>
@@ -137,7 +140,7 @@ namespace sprout {
 				Args const&... args
 				)
 			{
-				return sprout::remake_clone<Result, Result>(result, sprout::size(result), args...);
+				return sprout::remake_clone<Result, Result>(result, sprout::size(result), args..., head);
 			}
 			template<typename InputIterator, typename Result, typename BinaryPredicate, typename Head, typename... Args>
 			SPROUT_CONSTEXPR inline typename std::enable_if<
@@ -153,7 +156,7 @@ namespace sprout {
 				Args const&... args
 				)
 			{
-				return first != last && sizeof...(Args) + 1 < offset
+				return first != last && sizeof...(Args) + 1 < static_cast<std::size_t>(offset)
 					? !pred(head, *first)
 						? unique_copy_impl_2(sprout::next(first), last, result, pred, offset, *first, args..., head)
 						: unique_copy_impl_2(sprout::next(first), last, result, pred, offset, head, args...)
@@ -188,9 +191,11 @@ namespace sprout {
 				Args const&... args
 				)
 			{
-				return sizeof...(Args) < offset
+				return sizeof...(Args) < static_cast<std::size_t>(offset)
 					? unique_copy_impl_1(first, last, result, pred, offset, args..., *(sprout::fixed_begin(result) + sizeof...(Args)))
-					: unique_copy_impl_2(sprout::next(first), last, result, pred, offset + sprout::size(result), *first, args...)
+					: first != last
+						? unique_copy_impl_2(sprout::next(first), last, result, pred, offset + sprout::size(result), *first, args...)
+						: unique_copy_impl_3(result, args...)
 					;
 			}
 			template<typename InputIterator, typename Result, typename BinaryPredicate>
diff --git a/sprout/detail/functional.hpp b/sprout/detail/functional.hpp
index 4f66da6e..1c366f96 100644
--- a/sprout/detail/functional.hpp
+++ b/sprout/detail/functional.hpp
@@ -6,6 +6,19 @@
 
 namespace sprout {
 	namespace detail {
+		//
+		// equal_to
+		//
+		template<typename T>
+		class equal_to
+			: public std::binary_function<T, T, bool>
+		{
+		public:
+			SPROUT_CONSTEXPR bool operator()(T const& lhs, T const& rhs) const {
+				return lhs == rhs;
+			}
+		};
+
 		//
 		// less
 		//
diff --git a/sprout/range/numeric.hpp b/sprout/range/numeric.hpp
new file mode 100644
index 00000000..8f0f533e
--- /dev/null
+++ b/sprout/range/numeric.hpp
@@ -0,0 +1,8 @@
+#ifndef SPROUT_RANGE_NUMERIC_HPP
+#define SPROUT_RANGE_NUMERIC_HPP
+
+#include <sprout/config.hpp>
+#include <sprout/range/numeric/fixed.hpp>
+#include <sprout/range/numeric/fit.hpp>
+
+#endif	// #ifndef SPROUT_RANGE_NUMERIC_HPP
diff --git a/sprout/range/numeric/adjacent_difference.hpp b/sprout/range/numeric/adjacent_difference.hpp
new file mode 100644
index 00000000..96d04927
--- /dev/null
+++ b/sprout/range/numeric/adjacent_difference.hpp
@@ -0,0 +1,8 @@
+#ifndef SPROUT_RANGE_NUMERIC_ADJACENT_DIFFERENCE_HPP
+#define SPROUT_RANGE_NUMERIC_ADJACENT_DIFFERENCE_HPP
+
+#include <sprout/config.hpp>
+#include <sprout/range/numeric/fixed/adjacent_difference.hpp>
+#include <sprout/range/numeric/fit/adjacent_difference.hpp>
+
+#endif	// #ifndef SPROUT_RANGE_NUMERIC_ADJACENT_DIFFERENCE_HPP
diff --git a/sprout/range/numeric/fit.hpp b/sprout/range/numeric/fit.hpp
new file mode 100644
index 00000000..a1b89fb1
--- /dev/null
+++ b/sprout/range/numeric/fit.hpp
@@ -0,0 +1,8 @@
+#ifndef SPROUT_RANGE_NUMERIC_FIT_HPP
+#define SPROUT_RANGE_NUMERIC_FIT_HPP
+
+#include <sprout/config.hpp>
+#include <sprout/range/numeric/fit/partial_sum.hpp>
+#include <sprout/range/numeric/fit/adjacent_difference.hpp>
+
+#endif	// #ifndef SPROUT_RANGE_NUMERIC_FIT_HPP
diff --git a/sprout/range/numeric/fit/adjacent_difference.hpp b/sprout/range/numeric/fit/adjacent_difference.hpp
new file mode 100644
index 00000000..d18edb7f
--- /dev/null
+++ b/sprout/range/numeric/fit/adjacent_difference.hpp
@@ -0,0 +1,40 @@
+#ifndef SPROUT_RANGE_NUMERIC_FIT_ADJACENT_DIFFERENCE_HPP
+#define SPROUT_RANGE_NUMERIC_FIT_ADJACENT_DIFFERENCE_HPP
+
+#include <sprout/config.hpp>
+#include <sprout/fixed_container/traits.hpp>
+#include <sprout/fixed_container/functions.hpp>
+#include <sprout/algorithm/fit/result_of.hpp>
+#include <sprout/numeric/fit/adjacent_difference.hpp>
+
+namespace sprout {
+	namespace range {
+		namespace fit {
+			//
+			// adjacent_difference
+			//
+			template<typename Input, typename Result>
+			SPROUT_CONSTEXPR inline typename sprout::fit::result_of::algorithm<Result>::type adjacent_difference(
+				Input const& input,
+				Result const& result
+				)
+			{
+				return sprout::fit::adjacent_difference(sprout::begin(input), sprout::end(input), result);
+			}
+			//
+			// adjacent_difference
+			//
+			template<typename Input, typename Result, typename BinaryOperation>
+			SPROUT_CONSTEXPR inline typename sprout::fit::result_of::algorithm<Result>::type adjacent_difference(
+				Input const& input,
+				Result const& result,
+				BinaryOperation binary_op
+				)
+			{
+				return sprout::fit::adjacent_difference(sprout::begin(input), sprout::end(input), result, binary_op);
+			}
+		}	// namespace fit
+	}	// namespace range
+}	// namespace sprout
+
+#endif	// #ifndef SPROUT_RANGE_NUMERIC_FIT_ADJACENT_DIFFERENCE_HPP
diff --git a/sprout/range/numeric/fit/partial_sum.hpp b/sprout/range/numeric/fit/partial_sum.hpp
new file mode 100644
index 00000000..de439e15
--- /dev/null
+++ b/sprout/range/numeric/fit/partial_sum.hpp
@@ -0,0 +1,40 @@
+#ifndef SPROUT_RANGE_NUMERIC_FIT_PARTIAL_SUM_HPP
+#define SPROUT_RANGE_NUMERIC_FIT_PARTIAL_SUM_HPP
+
+#include <sprout/config.hpp>
+#include <sprout/fixed_container/traits.hpp>
+#include <sprout/fixed_container/functions.hpp>
+#include <sprout/algorithm/fit/result_of.hpp>
+#include <sprout/numeric/fit/partial_sum.hpp>
+
+namespace sprout {
+	namespace range {
+		namespace fit {
+			//
+			// partial_sum
+			//
+			template<typename Input, typename Result>
+			SPROUT_CONSTEXPR inline typename sprout::fit::result_of::algorithm<Result>::type partial_sum(
+				Input const& input,
+				Result const& result
+				)
+			{
+				return sprout::fit::partial_sum(sprout::begin(input), sprout::end(input), result);
+			}
+			//
+			// partial_sum
+			//
+			template<typename Input, typename Result, typename BinaryOperation>
+			SPROUT_CONSTEXPR inline typename sprout::fit::result_of::algorithm<Result>::type partial_sum(
+				Input const& input,
+				Result const& result,
+				BinaryOperation binary_op
+				)
+			{
+				return sprout::fit::partial_sum(sprout::begin(input), sprout::end(input), result, binary_op);
+			}
+		}	// namespace fit
+	}	// namespace range
+}	// namespace sprout
+
+#endif	// #ifndef SPROUT_RANGE_NUMERIC_FIT_PARTIAL_SUM_HPP
diff --git a/sprout/range/numeric/fixed.hpp b/sprout/range/numeric/fixed.hpp
new file mode 100644
index 00000000..a4f9027b
--- /dev/null
+++ b/sprout/range/numeric/fixed.hpp
@@ -0,0 +1,8 @@
+#ifndef SPROUT_RANGE_NUMERIC_FIXED_HPP
+#define SPROUT_RANGE_NUMERIC_FIXED_HPP
+
+#include <sprout/config.hpp>
+#include <sprout/range/numeric/fixed/partial_sum.hpp>
+#include <sprout/range/numeric/fixed/adjacent_difference.hpp>
+
+#endif	// #ifndef SPROUT_RANGE_NUMERIC_FIXED_HPP
diff --git a/sprout/range/numeric/fixed/adjacent_difference.hpp b/sprout/range/numeric/fixed/adjacent_difference.hpp
new file mode 100644
index 00000000..e3345541
--- /dev/null
+++ b/sprout/range/numeric/fixed/adjacent_difference.hpp
@@ -0,0 +1,42 @@
+#ifndef SPROUT_RANGE_NUMERIC_FIXED_ADJACENT_DIFFERENCE_HPP
+#define SPROUT_RANGE_NUMERIC_FIXED_ADJACENT_DIFFERENCE_HPP
+
+#include <sprout/config.hpp>
+#include <sprout/fixed_container/traits.hpp>
+#include <sprout/fixed_container/functions.hpp>
+#include <sprout/algorithm/fixed/result_of.hpp>
+#include <sprout/numeric/fixed/adjacent_difference.hpp>
+
+namespace sprout {
+	namespace range {
+		namespace fixed {
+			//
+			// adjacent_difference
+			//
+			template<typename Input, typename Result>
+			SPROUT_CONSTEXPR inline typename sprout::fixed::result_of::algorithm<Result>::type adjacent_difference(
+				Input const& input,
+				Result const& result
+				)
+			{
+				return sprout::fixed::adjacent_difference(sprout::begin(input), sprout::end(input), result);
+			}
+			//
+			// adjacent_difference
+			//
+			template<typename Input, typename Result, typename BinaryOperation>
+			SPROUT_CONSTEXPR inline typename sprout::fixed::result_of::algorithm<Result>::type adjacent_difference(
+				Input const& input,
+				Result const& result,
+				BinaryOperation binary_op
+				)
+			{
+				return sprout::fixed::adjacent_difference(sprout::begin(input), sprout::end(input), result, binary_op);
+			}
+		}	// namespace fixed
+
+		using sprout::range::fixed::adjacent_difference;
+	}	// namespace range
+}	// namespace sprout
+
+#endif	// #ifndef SPROUT_RANGE_NUMERIC_FIXED_ADJACENT_DIFFERENCE_HPP
diff --git a/sprout/range/numeric/fixed/partial_sum.hpp b/sprout/range/numeric/fixed/partial_sum.hpp
new file mode 100644
index 00000000..429b0f83
--- /dev/null
+++ b/sprout/range/numeric/fixed/partial_sum.hpp
@@ -0,0 +1,42 @@
+#ifndef SPROUT_RANGE_NUMERIC_FIXED_PARTIAL_SUM_HPP
+#define SPROUT_RANGE_NUMERIC_FIXED_PARTIAL_SUM_HPP
+
+#include <sprout/config.hpp>
+#include <sprout/fixed_container/traits.hpp>
+#include <sprout/fixed_container/functions.hpp>
+#include <sprout/algorithm/fixed/result_of.hpp>
+#include <sprout/numeric/fixed/partial_sum.hpp>
+
+namespace sprout {
+	namespace range {
+		namespace fixed {
+			//
+			// partial_sum
+			//
+			template<typename Input, typename Result>
+			SPROUT_CONSTEXPR inline typename sprout::fixed::result_of::algorithm<Result>::type partial_sum(
+				Input const& input,
+				Result const& result
+				)
+			{
+				return sprout::fixed::partial_sum(sprout::begin(input), sprout::end(input), result);
+			}
+			//
+			// partial_sum
+			//
+			template<typename Input, typename Result, typename BinaryOperation>
+			SPROUT_CONSTEXPR inline typename sprout::fixed::result_of::algorithm<Result>::type partial_sum(
+				Input const& input,
+				Result const& result,
+				BinaryOperation binary_op
+				)
+			{
+				return sprout::fixed::partial_sum(sprout::begin(input), sprout::end(input), result, binary_op);
+			}
+		}	// namespace fixed
+
+		using sprout::range::fixed::partial_sum;
+	}	// namespace range
+}	// namespace sprout
+
+#endif	// #ifndef SPROUT_RANGE_NUMERIC_FIXED_PARTIAL_SUM_HPP
diff --git a/sprout/range/numeric/partial_sum.hpp b/sprout/range/numeric/partial_sum.hpp
new file mode 100644
index 00000000..efd146d4
--- /dev/null
+++ b/sprout/range/numeric/partial_sum.hpp
@@ -0,0 +1,8 @@
+#ifndef SPROUT_RANGE_NUMERIC_PARTIAL_SUM_HPP
+#define SPROUT_RANGE_NUMERIC_PARTIAL_SUM_HPP
+
+#include <sprout/config.hpp>
+#include <sprout/range/numeric/fixed/partial_sum.hpp>
+#include <sprout/range/numeric/fit/partial_sum.hpp>
+
+#endif	// #ifndef SPROUT_RANGE_NUMERIC_PARTIAL_SUM_HPP