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D.5.15.11 rankSheaf

Procedure from library schubert.lib (see schubert_lib).

Usage:
rankSheaf(S); S sheaf

Return:
int

Input:
S is a sheaf

Output:
a positive integer which is the rank of a sheaf.

Example:
 
LIB "schubert.lib";
variety G = Grassmannian(2,4);
def R = G.baseRing;
setring R;
sheaf S = makeSheaf(G,subBundle);
rankSheaf(S);
==> 2
See also: makeSheaf; printSheaf.