We have the sequence of matrices
B(i,j,n)=2/N exp(-cn^2 ) sin(nx_i ) sin(n y_j )
where N and n are integers ,x_i and y_ji are real numbers in the
interval [0 ,1] and c is a real parameter strictly positive.
We pose
A(c)= ∑_B(n) for n=1,....,10
How to write in Matlab the sum A(c) ?