Changes between Version 1 and Version 18 of Ticket #13391
 Timestamp:
 08/24/12 23:38:53 (10 years ago)
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Ticket #13391

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new
toneeds_review

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Anne Schilling
 Property Owner changed from sagecombinat to bump

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sage5.3
tosage5.4

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changed from

Ticket #13391 – Description
v1 v18 1 The multiplication algorithm for {{{WeylCharacterRings}}} is changed by this patch to an algorithm based on the BrauerKlimyk formula. This algorithm is asymmetric, so that a*b and b*a are equal but computed differently. It gives a modest speedup for sage t weyl_characters.py but for tasks it is a dramatic improvement. As an example, create the spin character of Spin(9):1 The multiplication algorithm for {{{WeylCharacterRings}}} is changed by this patch to an algorithm based on the BrauerKlimyk formula. This algorithm is asymmetric, so that a*b and b*a are equal but computed differently. They are sometimes interchanged in an attempt to give the most efficient evaluation. This patch gives a modest speedup for {{{sage t long weyl_characters.py}}} but in certain cases it is a dramatic improvement. As an example, create the spin character of Spin(9): 2 2 3 3 {{{