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powerRanks -- Compute the ranks of powers of a matrix

Description

This is what you do:

i1 : ea = exteriorExtension(3, 6, QQ);
 
i2 : A = ea.ad(first ea.bases#1);

              55       55
o2 : Matrix QQ   <-- QQ
 
i3 : ea.powerRanks A

o3 = {20, 1, 0}

o3 : List

The list outputs the rank of each power. These are invariants of the element x in ad(x).

For the programmer

The object powerRanks is a symbol.

The source of this document is in ExteriorExtensions.m2:591:0.