Added tensor product to helper functions

ToricExtras/HelperFunctions.m2

@@ -46,7 +46,7 @@ permutationIsomorphic := (X, Y) -> (
 
 
 
--- Calculates the dimension of the cohomology group H^0(TX), i.e. the dimension of the space of global vector fields on X
+-- Calculates the dimension of H^0(TX), i.e. the dimension of the space of global vector fields on X
 
 vectorFields = method();
 vectorFields := X -> (
@@ -87,6 +87,13 @@ primitiveCollections := X -> (
 );
 
 
+-- Calculates the tensor product of two sheaves on toric varieties, using Hom-tensor adjunction: F tensor G = Hom(F^*, G) = Hom(Hom(F, O), G)
+-- When I tried ** it didn't work
+
+tensor2 = method();
+tensor2 := (sheaf1, sheaf2) -> (prune sheafHom(prune sheafHom(cotangentSheaf(X), sheaf(X, ring X)), cotangentSheaf(X)));
+
+
 
 end--