feat: add Gorenstein-Walter theorem eval problem#314
Open
kim-em wants to merge 2 commits into
Open
Conversation
This PR adds the Gorenstein-Walter theorem (1965): a finite nonabelian simple group with dihedral Sylow 2-subgroups is isomorphic to PSL₂(q) for some odd prime power q ≥ 5 or to A₇. The first major application of the Bender method in CFSG. Uses Mathlib's PSL, DihedralGroup, alternatingGroup, and GaloisField — no new definitions. 🤖 Prepared with Claude Code
The previous docstring claimed `Fact p.Prime` is "used (via `letI`) to reach the GaloisField". In fact the existential `∃ _hp : Fact p.Prime` makes the typeclass available directly in the body of the existential — no `letI` is involved. Update the comment to match. 🤖 Prepared with Claude Code
kim-em
force-pushed
the
eval/gorenstein-walter
branch
from
48b94f7 to
c9179dd
Compare
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
This PR adds the Gorenstein-Walter theorem (1965): a finite nonabelian simple group with dihedral Sylow 2-subgroups is isomorphic to
PSL₂(q)for some odd prime powerq ≥ 5or toA₇. A ~250-page paper across three parts; the first major application of the Bender method in CFSG and a template for later Sylow-2-structure papers.Uses Mathlib's
PSL,DihedralGroup,alternatingGroup, andGaloisField— no new definitions.🤖 Prepared with Claude Code