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Fix bug in computing canonical class representative for pc groups which could yield wrong results in larger groups #4822

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merged 1 commit into from
Mar 10, 2022

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@hulpke hulpke commented Mar 9, 2022

must always use the same series. So if refining, cache result.

This unfortunately only is triggered in larger examples (i.e. when refining
happens). The only reproduceable test I have is in a somewhat larger group and runs for about half an hour.

Text for release notes

An error in computing canonical conjugacy class representatives, that could yield wrong results in larger groups, has been fixed.

must always use the same series. So if refining, cache result.

This unfortunately only is triggered in larger examples (i.e. when refining
happens).
@hulpke hulpke added kind: bug: wrong result Issues describing bugs that result in mathematically or otherwise wrong results, and PRs fixing them release notes: to be added PRs introducing changes that should be (but have not yet been) mentioned in the release notes priority: high labels Mar 9, 2022
@fingolfin fingolfin merged commit 2f902fc into gap-system:master Mar 10, 2022
@fingolfin fingolfin changed the title FIX: Canonical class representative for pc groups Fix bug in computing canonical class representative for pc groups which could yield wrong results in larger groups Aug 17, 2022
@fingolfin fingolfin added release notes: use title For PRs: the title of this PR is suitable for direct use in the release notes and removed release notes: to be added PRs introducing changes that should be (but have not yet been) mentioned in the release notes labels Aug 17, 2022
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