diff --git a/src/include/multi_array.h b/src/include/multi_array.h
index f975586..663d96f 100644
--- a/src/include/multi_array.h
+++ b/src/include/multi_array.h
@@ -7,6 +7,20 @@
 
 namespace MultiArrayTools
 {
+    template <typename T>
+    struct ArrayCatter;
+
+    
+    template <typename T>
+    struct ArrayCatter
+    {
+	template <class... Ranges>
+	static auto cat(const MultiArray<T,Ranges...>& ma)
+	    -> MultiArray<T,Ranges...>
+	{
+	    return ma;
+	}
+    };
 
     
     template <typename T, class... SRanges>
@@ -23,6 +37,7 @@ namespace MultiArrayTools
 	MultiArray(const std::shared_ptr<SRanges>&... ranges, const std::vector<T>& vec);
 	MultiArray(const std::shared_ptr<SRanges>&... ranges, std::vector<T>&& vec);
 	MultiArray(const typename CRange::SpaceType& space);
+	MultiArray(const typename CRange::SpaceType& space, std::vector<T>&& vec);
 	
 	// Only if ALL ranges have default extensions:
 	//MultiArray(const std::vector<T>& vec);
@@ -51,18 +66,46 @@ namespace MultiArrayTools
 	virtual const T* data() const override;
 	virtual T* data() override;
 	virtual std::vector<T>& vdata() { return mCont; }
+	virtual const std::vector<T>& vdata() const { return mCont; }
 
+	auto cat() const
+	    -> decltype(ArrayCatter<T>::cat(*this));
+	
 	operator T() const;	
 	
 	template <typename U, class... SRanges2>
 	friend class MultiArray;
 	
     private:
+	
 	std::vector<T> mCont;
     };
 
     template <typename T>
     using Scalar = MultiArray<T>;
+
+    template <typename T, class... ERanges>
+    struct ArrayCatter<MultiArray<T,ERanges...> >
+    {
+	template <class... Ranges>
+	static auto cat(const MultiArray<MultiArray<T,ERanges...>,Ranges...>& ma)
+	    -> MultiArray<T,Ranges...,ERanges...>
+	{
+	    auto sma = *ma.begin();
+	    const size_t smas = sma.size();
+	    const size_t mas = ma.size();
+	    auto cr = ma.range()->cat(sma.range());
+	    std::vector<T> ov;
+	    ov.reserve(mas * smas);
+
+	    for(auto& x: ma){
+		assert(x.size() == smas);
+		ov.insert(ov.end(), x.vdata().begin(), x.vdata().end());
+	    }
+	    return MultiArray<T,Ranges...,ERanges...>(cr->space(), std::move(ov));
+	}
+    };
+
     
 }
 
@@ -84,7 +127,20 @@ namespace MultiArrayTools
     {
 	MAB::mInit = true;
     }
-	
+
+    template <typename T, class... SRanges>
+    MultiArray<T,SRanges...>::MultiArray(const typename CRange::SpaceType& space,
+					 std::vector<T>&& vec) :
+	MutableMultiArrayBase<T,SRanges...>(space),
+	mCont(vec)
+    {
+	MAB::mInit = true;
+	if(mCont.size() > MAB::mRange->size()){
+	    mCont.erase(mCont.begin() + MAB::mRange->size(), mCont.end());
+	}
+    }
+
+    
     template <typename T, class... SRanges>
     MultiArray<T,SRanges...>::MultiArray(const std::shared_ptr<SRanges>&... ranges) :
 	MutableMultiArrayBase<T,SRanges...>(ranges...),
@@ -206,6 +262,13 @@ namespace MultiArrayTools
 	static_assert( sizeof...(SRanges) == 0, "try to cast non-scalar type into scalar" );
 	return mCont[0];
     }
+
+    template <typename T, class... SRanges>
+    auto MultiArray<T,SRanges...>::cat() const
+	-> decltype(ArrayCatter<T>::cat(*this))
+    {
+	return ArrayCatter<T>::cat(*this);
+    }
 }
 
 #endif
diff --git a/src/include/multi_array_base.h b/src/include/multi_array_base.h
index b0fc699..7ead45e 100644
--- a/src/include/multi_array_base.h
+++ b/src/include/multi_array_base.h
@@ -26,6 +26,13 @@ namespace MultiArrayTools
 	typedef ContainerRange<T,SRanges...> CRange;
 	typedef ContainerIndex<T,typename SRanges::IndexType...> IndexType;
 
+    protected:
+	bool mInit = false;
+	std::shared_ptr<CRange> mRange;
+	std::shared_ptr<IndexType> mProtoI;
+
+    public:
+
 	DEFAULT_MEMBERS(MultiArrayBase);
 	MultiArrayBase(const std::shared_ptr<SRanges>&... ranges);
 	MultiArrayBase(const typename CRange::SpaceType& space);
@@ -54,11 +61,11 @@ namespace MultiArrayTools
 	operator()(std::shared_ptr<typename SRanges::IndexType>&... inds) const;
 	
 	virtual bool isInit() const;
+
+	template <size_t N>
+	auto getRangePtr() const
+	    -> decltype(mRange->template getPtr<N>());
 	
-    protected:
-	bool mInit = false;
-	std::shared_ptr<CRange> mRange;
-	std::shared_ptr<IndexType> mProtoI;
     };
 
     template <typename T, class... SRanges>
@@ -193,6 +200,14 @@ namespace MultiArrayTools
 	return mInit;
     }
     
+    template <typename T, class... SRanges>
+    template <size_t N>
+    auto MultiArrayBase<T,SRanges...>::getRangePtr() const
+	-> decltype(mRange->template getPtr<N>())
+    {
+	return mRange->template getPtr<N>();
+    }
+
     
     /******************************
      *  MutableMultiArrayBase     *	     
diff --git a/src/include/ranges/anonymous_range.h b/src/include/ranges/anonymous_range.h
index d47999c..b573c44 100644
--- a/src/include/ranges/anonymous_range.h
+++ b/src/include/ranges/anonymous_range.h
@@ -27,6 +27,9 @@ namespace MultiArrayTools
 	template <class... RangeTypes>
 	AnonymousRangeFactory(std::shared_ptr<RangeTypes>... origs);
 
+	template <class Range>
+	void append(std::shared_ptr<Range> r);
+	
 	std::shared_ptr<RangeBase> create();
 	
     };
@@ -56,6 +59,9 @@ namespace MultiArrayTools
 
 	template <class Range>
 	std::shared_ptr<Range> fullsub(size_t num) const;
+
+	template <class... Ranges>
+	MultiRange<Ranges...> scast() const; // save cast
 	
 	friend AnonymousRangeFactory;
 	
@@ -99,6 +105,12 @@ namespace MultiArrayTools
     {
 	mProd = std::shared_ptr<oType>( new AnonymousRange( origs... ) );
     }
+
+    template <class Range>
+    void AnonymousRangeFactory::append(std::shared_ptr<Range> r)
+    {
+	std::dynamic_pointer_cast<oType>(mProd)->mOrig.push_back(r);
+    }    
     
     /***********************
      *   AnonymousRange    *
@@ -128,6 +140,12 @@ namespace MultiArrayTools
     {
 	return std::dynamic_pointer_cast<Range>( mOrig.at(num) );
     }
+
+    template <class... Ranges>
+    MultiRange<Ranges...> AnonymousRange::scast() const
+    {
+	// !!!!!!
+    }
     
     /*****************
      *   Functions   *
diff --git a/src/include/ranges/container_range.h b/src/include/ranges/container_range.h
index 3a97024..844bcec 100644
--- a/src/include/ranges/container_range.h
+++ b/src/include/ranges/container_range.h
@@ -494,6 +494,7 @@ namespace MultiArrayTools
 		(*this)++;
 	    }
 	}
+	return *this;
     }
 
     template <typename T, class... Indices>
@@ -509,6 +510,7 @@ namespace MultiArrayTools
 		(*this)--;
 	    }
 	}
+	return *this;
     }
 
     template <typename T, class... Indices>
diff --git a/src/include/ranges/multi_range.h b/src/include/ranges/multi_range.h
index 4fded25..8f0b964 100644
--- a/src/include/ranges/multi_range.h
+++ b/src/include/ranges/multi_range.h
@@ -176,6 +176,10 @@ namespace MultiArrayTools
 	virtual IndexType begin() const final;
 	virtual IndexType end() const final;
 
+	template <class... ERanges>
+	auto cat(const std::shared_ptr<MultiRange<ERanges...> >& erange)
+	    -> std::shared_ptr<MultiRange<Ranges...,ERanges...> >;
+	
 	friend MultiRangeFactory<Ranges...>;
 
 	static constexpr bool defaultable = false;
@@ -510,6 +514,17 @@ namespace MultiArrayTools
 	i = size();
 	return i;
     }
+
+    template <class... Ranges>
+    template <class... ERanges>
+    auto MultiRange<Ranges...>::cat(const std::shared_ptr<MultiRange<ERanges...> >& erange)
+	-> std::shared_ptr<MultiRange<Ranges...,ERanges...> >
+    {
+	auto crange = std::tuple_cat(mSpace, erange->space());
+	MultiRangeFactory<Ranges...,ERanges...> rf(crange);
+	return std::dynamic_pointer_cast<MultiRange<Ranges...,ERanges...> >(rf.create());
+    }
+
 }
 
 #endif
diff --git a/src/include/ranges/range_types/header.h b/src/include/ranges/range_types/header.h
index 54ff304..9c1f66e 100644
--- a/src/include/ranges/range_types/header.h
+++ b/src/include/ranges/range_types/header.h
@@ -15,6 +15,7 @@
 //#define __ranges_header__
 
 #include "spin_range.h"
+#include "space_range.h"
 #include "classic_range.h"
 
 #undef __ranges_header__
diff --git a/src/include/ranges/range_types/space_range.h b/src/include/ranges/range_types/space_range.h
new file mode 100644
index 0000000..79f3c26
--- /dev/null
+++ b/src/include/ranges/range_types/space_range.h
@@ -0,0 +1,118 @@
+
+#ifdef include_range_type
+include_range_type(PSPACE,3) // Periodic 1dim space
+#else
+
+#ifdef __ranges_header__
+
+namespace MultiArrayTools
+{
+     // Periodic 1dim space
+    typedef SingleIndex<int,SpaceType::PSPACE> XSpaceIndex;
+
+    template <>
+    class SingleRangeFactory<int,SpaceType::PSPACE> : public RangeFactoryBase
+    {
+    public:
+	
+	typedef SingleRange<int,SpaceType::PSPACE> oType;
+
+	SingleRangeFactory(size_t size = 0);
+	std::shared_ptr<RangeBase> create();
+	
+    };
+    
+    template <>
+    class SingleRange<int,SpaceType::PSPACE> : public RangeInterface<XSpaceIndex>
+    {
+    public:
+	typedef RangeBase RB;
+	typedef typename RangeInterface<SingleIndex<int,SpaceType::PSPACE> >::IndexType IndexType;
+	typedef SingleRange<int,SpaceType::PSPACE> RangeType;
+	typedef int MetaType;
+	
+	virtual size_t size() const override;
+	virtual size_t dim() const override;
+	
+	int get(size_t pos) const;
+	size_t getMeta(int metaPos) const;
+	
+	virtual IndexType begin() const override;
+	virtual IndexType end() const override;
+	//virtual std::shared_ptr<VIWB> index() const override;
+	
+	friend SingleRangeFactory<int,SpaceType::PSPACE>;
+
+	static constexpr bool defaultable = true;
+	static constexpr size_t ISSTATIC = 0;
+	static constexpr size_t SIZE = -1;
+	static constexpr bool HASMETACONT = false;
+	
+	static SingleRangeFactory<int, SpaceType::PSPACE> factory(size_t size = 0)
+	{ return SingleRangeFactory<int, SpaceType::PSPACE>(size); }
+	
+    protected:
+
+	size_t mSize = 0;
+	
+	SingleRange() = default;
+	SingleRange(const SingleRange& in) = delete;
+	
+	SingleRange(size_t size);
+    };
+
+    typedef SingleRange<int,SpaceType::PSPACE> PSpaceRange;
+    typedef SingleRangeFactory<int,SpaceType::PSPACE> PSpaceRF;
+
+    template <class SpaceRange>
+    struct PromoteMSpaceRange
+    {
+	template <class... SpaceRanges>
+	static auto mk(MultiRange<SpaceRanges...>) -> MultiRange<SpaceRange,SpaceRanges...>;
+
+	template <class... SpaceRanges>
+	static auto mkf(MultiRangeFactory<SpaceRanges...>) -> MultiRangeFactory<SpaceRange,SpaceRanges...>;
+
+    };
+
+    template <size_t N>
+    struct CreateNDimSpaceRange
+    {
+	template <class SpaceRange>
+	static auto mk()
+	    -> decltype(PromoteMSpaceRange<SpaceRange>::
+			template mk(CreateNDimSpaceRange<N-1>::
+				    template mk<SpaceRange>()));
+
+	template <class SpaceRange>
+	static auto mkf()
+	    -> decltype(PromoteMSpaceRange<SpaceRange>::
+			template mkf(CreateNDimSpaceRange<N-1>::
+				     template mkf<SpaceRange>()));
+
+    };
+
+    template <>
+    struct CreateNDimSpaceRange<1>
+    {
+	template <class SpaceRange>
+	static auto mk()
+	    -> MultiRange<SpaceRange>;
+
+	template <class SpaceRange>
+	static auto mkf()
+	    -> MultiRangeFactory<SpaceRange>;
+
+    };
+
+    template <class SpaceRange, size_t N>
+    using MSpaceRange = decltype(CreateNDimSpaceRange<N>::template mk<SpaceRange>());
+
+    template <class SpaceRange, size_t N>
+    using MSpaceRF = decltype(CreateNDimSpaceRange<N>::template mkf<SpaceRange>());
+}
+
+
+#endif // #ifdef __ranges_header__
+
+#endif // #ifdef include_range_type
diff --git a/src/include/ranges/rpack_num.h b/src/include/ranges/rpack_num.h
index 3f23aff..06947e0 100644
--- a/src/include/ranges/rpack_num.h
+++ b/src/include/ranges/rpack_num.h
@@ -203,7 +203,7 @@ namespace MultiArrayHelper
 
 	template <class... Ranges>
 	static void RangesToVec(const std::tuple<std::shared_ptr<Ranges>...>& rst,
-				std::vector<RangeBase> v)
+				std::vector<std::shared_ptr<RangeBase> >& v)
 	{
 	    v[N] = std::get<N>(rst);
 	    RPackNum<N-1>::RangesToVec(rst, v);
@@ -387,7 +387,7 @@ namespace MultiArrayHelper
 
 	template <class... Ranges>
 	static void RangesToVec(const std::tuple<std::shared_ptr<Ranges>...>& rst,
-				std::vector<RangeBase> v)
+				std::vector<std::shared_ptr<RangeBase> >& v)
 	{
 	    v[0] = std::get<0>(rst);
 	}
diff --git a/src/lib/ranges/anonymous_range.cc b/src/lib/ranges/anonymous_range.cc
index 61271dc..911e6a2 100644
--- a/src/lib/ranges/anonymous_range.cc
+++ b/src/lib/ranges/anonymous_range.cc
@@ -6,10 +6,10 @@ namespace MultiArrayTools
     /******************************
      *   AnonymousRangeFactory    *
      ******************************/
-        
+    
     std::shared_ptr<RangeBase> AnonymousRangeFactory::create()
     {
-	setSelf();
+	//setSelf();
 	return mProd;
     }
 
@@ -55,6 +55,7 @@ namespace MultiArrayTools
 	return i;
     }
 
+    
     std::shared_ptr<RangeBase> AnonymousRange::sub(size_t num) const
     {
 	return mOrig.at(num);
diff --git a/src/lib/ranges/range_types/classic_range.cc b/src/lib/ranges/range_types/classic_range.cc
index 97038bb..82c2af6 100644
--- a/src/lib/ranges/range_types/classic_range.cc
+++ b/src/lib/ranges/range_types/classic_range.cc
@@ -62,17 +62,5 @@ namespace MultiArrayTools
 	i = size();
 	return i;
     }
-
-    // put this in the interface class !!!
-    /*
-    std::shared_ptr<VIWB> SingleRange<size_t,SpaceType::NONE>::index() const
-    {
-	typedef IndexWrapper<IndexType> IW;
-	return std::make_shared<IW>
-            ( std::make_shared<IndexType>
-	      ( std::dynamic_pointer_cast<SingleRange<size_t,SpaceType::NONE> >
-		( std::shared_ptr<RangeBase>( RB::mThis ) ) ) );
-    }
-    */
 }
 
diff --git a/src/lib/ranges/range_types/space_range.cc b/src/lib/ranges/range_types/space_range.cc
new file mode 100644
index 0000000..48fd9d4
--- /dev/null
+++ b/src/lib/ranges/range_types/space_range.cc
@@ -0,0 +1,66 @@
+
+#include "ranges/rheader.h"
+
+namespace MultiArrayTools
+{
+    /********************
+     *   SingleRange    *
+     ********************/
+    
+    SingleRangeFactory<int,SpaceType::PSPACE>::SingleRangeFactory(size_t size)
+    {
+	// Quasi Singleton
+	if(not mProd){
+	    mProd = std::shared_ptr<oType>( new SingleRange<int,SpaceType::PSPACE>(size) );
+	    setSelf();
+	}
+    }
+
+    std::shared_ptr<RangeBase> SingleRangeFactory<int,SpaceType::PSPACE>::create()
+    {
+	return mProd;
+    }
+    
+    /********************
+     *   SingleRange    *
+     ********************/
+
+    SingleRange<int,SpaceType::PSPACE>::SingleRange(size_t size) : mSize(size) { }
+    
+    int SingleRange<int,SpaceType::PSPACE>::get(size_t pos) const
+    {
+	return pos > mSize / 2 ? pos - mSize : pos;
+    }
+    
+    size_t SingleRange<int,SpaceType::PSPACE>::getMeta(int metaPos) const
+    {
+	return metaPos < 0 ? metaPos + mSize : metaPos;
+    }
+    
+    size_t SingleRange<int,SpaceType::PSPACE>::size() const
+    {
+	return mSize;
+    }
+    
+    size_t SingleRange<int,SpaceType::PSPACE>::dim() const
+    {
+	return 1;
+    }
+    
+    typename SingleRange<int,SpaceType::PSPACE>::IndexType SingleRange<int,SpaceType::PSPACE>::begin() const
+    {
+	SingleIndex<int,SpaceType::PSPACE> i( std::dynamic_pointer_cast<SingleRange<int,SpaceType::PSPACE> >
+			       ( std::shared_ptr<RangeBase>( RB::mThis ) ) );
+	i = 0;
+	return i;
+    }
+    
+    typename SingleRange<int,SpaceType::PSPACE>::IndexType SingleRange<int,SpaceType::PSPACE>::end() const
+    {
+	SingleIndex<int,SpaceType::PSPACE> i( std::dynamic_pointer_cast<SingleRange<int,SpaceType::PSPACE> >
+			       ( std::shared_ptr<RangeBase>( RB::mThis ) ) );
+	i = size();
+	return i;
+    }
+}
+