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D.13.3.21 permutationToIntvec

Procedure from library gitfan.lib (see gitfan_lib).

Usage:
permutationToIntvec(sigma); sigma: permutation

Purpose:
Convert a permutation to an intvec of images.

Return:
intvec

Example:
 
LIB "gitfan.lib";
permutation sigma = permutationFromIntvec(intvec( 1, 2, 4, 3, 5, 7, 6, 9, 8, 10 ));
sigma;
==> |  1  2  3  4  5  6  7  8  9 10|
==> |  1  2  4  3  5  7  6  9  8 10|
==> 
permutationToIntvec(sigma);
==> 1,2,4,3,5,7,6,9,8,10

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