Dear Maple community,

I am trying to define an operator in Maple that multiplies to an expression and substitutes the indices.

The issue is that I don't want to add the expression as input of the operator/function, sth like:

p := proc(i, j, z) option operator; subs({i = j, j = i}, z); end proc

I want it to act on expression, like:

P(i,j)*X(i,j,k)=X(j,i,k)

and X can be any tensor or matrix.

Thanks in advance.