[Boost-users] multi_array math operation.

Question 1: How would i add or subtract multiarray given the fact that i don't know the dimension of it... Like its N dimension where N = 4. and u know both Multi_array A and Multi_Array B has [x][y][z][w] dimension and u want to add them together. Question 2: are there any built in operator for that...the built in + only does pointers address not adding actual object together.