FUNCTION: &mm - scalar product of a K₀X class with an integer

CALLING SEQUENCE:
&mm(r,f)

PARAMETERS:
r - an integer
f - a K₀ class of type quiver

SYNOPSIS:

• &mm(r,f) computes the scalar product of the K₀X -class f with the integer r.

EXAMPLES:

> with(tubular):

> read_in(3,3,3);

assume f1 defined

> show(f1);

> f2 := &mm(-8,f1); show(f2);