Add constructive recognition of SL(2,q) in natural representation 2.0#398

Merged

fingolfin merged 21 commits intogap-packages:masterfrom

Till-Eisen:Including_Franks_SL2

Apr 30, 2026

Commits on Mar 31, 2026

Add Frank Lübeck's SL2 natural representation recognition 2.0
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load sl2_natural.gi in read.g
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add test for ConRecogNaturalSL2
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Add RECOG.ConRecogNaturalSL22 for constructive recognition of SL(2,2)
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Add test for RECOG.ConRecogNaturalSL22 in sl2.tst
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using explicit SL22 function
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Require GAP >=4.13 and remove 4.12 from CI
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Restore contrib/frank/sl2
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Add function ConRecogNaturalSL25 for SL(2,5) and tests
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recog: improve ConRecogNaturalSL25
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recog: add ConRecogNaturalSL23 for SL(2,3)
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Fix RECOG.RecogNaturalSL2 in even characteristic

fingolfin
authored and
Till Müller
committed

Commits on Apr 1, 2026

use RECOG.RecogNaturalSL2 in even char
Till Müller
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Commits on Apr 2, 2026

Add changes in RECOG.RecogNaturalSL2 see PR #434
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Adjust tests
fingolfin
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oops
fingolfin
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return of RECOG.ConRecogNaturalSL2 in odd char should be pretty again
Till Müller
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Commits on Apr 8, 2026

Add SL24 recognition and some minor edits
Till Müller
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Commits on Apr 22, 2026

Add more SL(2,4) tests and some minor changes
Till Müller
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Commits on Apr 28, 2026

Remove redundant tests
Till Müller
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Apply suggestion from @fingolfin

Till-Eisen
and
fingolfin
authored