diff --git a/dimension_t/src/dimension_t/dimension_t.c b/dimension_t/src/dimension_t/dimension_t.c
index 950829d..cf2e339 100644
--- a/dimension_t/src/dimension_t/dimension_t.c
+++ b/dimension_t/src/dimension_t/dimension_t.c
@@ -1,6 +1,74 @@
 #include "dimension_t/dimension_t.h"
 
+bool endian=true;
+
+bool isLessEqThan(long int a, long int b) { return a <= b; }
+bool isLessThan(long int a, long int b) { return a < b; }
+bool isGreatEqThan(long int a, long int b)  { return a >= b; }
+bool isGreatThan(long int a, long int b)  { return a > b; }
+long int incr(long int i) { return i + 1; }
+long int decr(long int i) { return i - 1; }
+
+
+
 dimension *
 create_dim(size_t sz){
   return CREATE_PERMUTATION_TYPE_SIZE_T(sz);
 }
+
+void updateRankDim(dimension *dim){
+  dim->rank=1;
+  for(size_t i=0; i<dim->size; ++i)
+    dim->rank *=dim->perm[i];
+}
+
+size_t LineFromCoord(size_t *coo, dimension dim){
+    long int begin = 0;
+    long int end = dim.size - 1;
+    long int (*iter)(long int); iter = &incr;
+    bool (*cond)(long int, long int); cond = &isLessEqThan;
+
+    if (endian) {
+        begin = dim.size - 1; end = 0;
+        iter = &decr; cond = &isGreatEqThan;
+    }
+
+    long int pp = 1;
+    long int sm = 0;
+    for (long int i = begin; cond(i, end); i = iter(i)) {
+        sm += (coo[i] * pp);
+        pp *= dim.perm[i];
+    }
+    return sm;
+
+}
+
+
+size_t* CoordFromLin(size_t line, dimension dim){
+    size_t *ret;
+    ret=malloc(dim.size*sizeof(size_t));
+    long int begin = 0, end = dim.size - 1;
+    long int (*iter)(long int) = incr;
+    bool (*cond)(long int, long int) = isLessThan;
+    if (endian == false) {
+        //if (endian) {
+        begin = dim.size - 1; end = 0;
+        iter = decr; cond = isGreatThan;
+    }
+    //prlong intf("to coor begin = %d end = %d \n", begin, end);
+
+    long int sm = line;
+    long int pp = dim.rank;
+    for (long int i = begin; cond(i, end); i = iter(i)) {
+        //prlong intf(" i: %d ", i);
+        pp /= dim.perm[i];
+        ret[i] = sm / pp;
+        sm %= pp;
+        //prlong intf("sm[%d] = %d , pp=%d ; ", i, sm, pp);
+    }
+    ret[end] = sm;
+
+    return ret;
+
+}
+
diff --git a/dimension_t/src/dimension_t/dimension_t.h b/dimension_t/src/dimension_t/dimension_t.h
index 357c731..cdc9f61 100644
--- a/dimension_t/src/dimension_t/dimension_t.h
+++ b/dimension_t/src/dimension_t/dimension_t.h
@@ -3,9 +3,17 @@
 
 #include "permutation_t/permutation_t.h"
 
+extern bool endian;
+
 typedef struct PERMUTATION_TYPE_SIZE_T dimension ;
 
-dimension * create_dim(size_t);
+dimension * create_dim(size_t size);
+
+void updateRankDim(dimension *dim);
+size_t LineFromCoord(size_t *coo, dimension dim);
+size_t* CoordFromLin(size_t line, dimension dim);
+
+
 
 #endif /* __DIMENSION_T__H__ */
 //int compare_dimension(dimension *d1, dimension *d2);
diff --git a/dimension_t/test/is_good.c b/dimension_t/test/is_good.c
index 7b4a79b..46447cd 100644
--- a/dimension_t/test/is_good.c
+++ b/dimension_t/test/is_good.c
@@ -23,7 +23,36 @@ TEST(dimension0){
   EXPECT_EQ(D->size,5);
 
 }
+TEST(rank){
+  dimension *D=create_dim(4);
+  D->perm[0]=2;
+  D->perm[1]=3;
+  D->perm[2]=5;
+  D->perm[3]=6;
 
+  updateRankDim(D);
+  EXPECT_EQ(D->rank, 180);
+
+}
+
+TEST(Coord_linear){
+  dimension *D=create_dim(4);
+  D->perm[0]=2;
+  D->perm[1]=3;
+  D->perm[2]=5;
+  D->perm[3]=6;
+
+  updateRankDim(D);
+
+  size_t line=255;
+  size_t *coord = CoordFromLin(line,*D);
+
+  for(size_t i=0; i<D->size; ++i){
+    LOG("coo[%ld]=%ld\n",i,coord[i]);
+  }
+  
+  EXPECT_EQ(line, LineFromCoord(coord, *D));  
+}
 
 int main(int argc, char **argv){
   
diff --git a/tensor_t/src/tensor_t/tensor_t.c b/tensor_t/src/tensor_t/tensor_t.c
index 3739e0b..79ef9da 100644
--- a/tensor_t/src/tensor_t/tensor_t.c
+++ b/tensor_t/src/tensor_t/tensor_t.c
@@ -1,3 +1,11 @@
 #include "tensor_t/tensor_t.h"
 
+#define GEN_FUNC_TENSOR(type)\
+  struct tensor_##type CREATE_TENSOR_##type(struct dimension_t dim){\
+    struct tensor_##type r_tens=malloc(sizeof(tensor_t##type));\
+    r_tens->x=malloc(sizeof(type)*dim->size);\
+    return r_tens;\
+  }
+
+
 
diff --git a/tensor_t/src/tensor_t/tensor_t.h b/tensor_t/src/tensor_t/tensor_t.h
index 85163f4..d6072de 100644
--- a/tensor_t/src/tensor_t/tensor_t.h
+++ b/tensor_t/src/tensor_t/tensor_t.h
@@ -3,6 +3,15 @@
 
 #include "dimension_t/dimension_t.h"
 
+#define GENERATE_TENSOR_TYPE(type) \
+struct tensor_##type{\
+  dimension dim;\
+  type *x;\
+};\
+typedef struct tensor_##type tensor_##type;\
+struct tensor_##type CREATE_TENSOR_##type(struct dimension_t dim); \
+
+
 
 
 #endif /* __TENSOR_T__H__ */