FUNCTION: slope_ - computes the slope of any K0X -class of type quiver

CALLING SEQUENCE:
slope_(f)

PARAMETERS:
f - an arbitrary class of type quiver

SYNOPSIS:

EXAMPLES:

> with(tubular):

> read_in(3,3,3);

> f := get_class([-7/3,3,0,2]); show(f);

[Maple Math]

[Maple Math]

> slope_(f);

[Maple Math]

SEE ALSO: rank_ , degree_, get_class, tubular/datatypes

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