FUNCTION: Compo2MajorIndex - major index of a given composition

CALLING SEQUENCE:

Compo2MajorIndex(compo)

COMP[Compo2MajorIndex](compo)

PARAMETERS:

compo = any list denoting a composition

SYNOPSIS:

• The Compo2MajorIndex function computes the major index of a given composition. Let I = [i_1, i_2, ..., i_m] be a composition, then Compo2MajorIndex(I) is set to be (m-1) i_1 + (m-2) i_2 + ... + i_{m-1}.

• Whenever there is a conflict between the function name Compo2MajorIndex and another name used in the same session, use the long form COMP['Compo2MajorIndex'].

EXAMPLES:

> with(COMP):
> Compo2MajorIndex([2,3,1,2]);
 
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