Matrix multiplication in GAMS

GAMS
1

Dear all,

what is the best way to multiply two matrix in GAMS?

Thanks for all your answer,
Luca

2

hi, the matrix dimensions must be compatible to carry out the multiplication.
Here are some examples:

eq(i,j).. C(i,j) =e= sum(k,A(i,k)*B(k,j));

or

eq(i,j).. C(i,j) =e=  sum((k,m)$(ord(m) eq ord(k)), A(i,k)*B(m,j) );

Bye!