Zulip Chat Archive
Stream: triage
Topic: issue !4#11119: Porting note: `@[simp]` removed
Random Issue Bot (May 15 2024 at 14:09):
Today I chose issue 11119 for discussion!
Porting note: @[simp] removed
Created by @Pietro Monticone (@pitmonticone) on 2024-03-02
Labels: porting-notes
Is this issue still relevant? Any recent updates? Anyone making progress?
Random Issue Bot (Oct 23 2025 at 14:13):
Today I chose issue #11119 for discussion!
Porting note: @[simp] removed
Created by @Pietro Monticone (@pitmonticone) on 2024-03-02
Labels: porting-notes
Is this issue still relevant? Any recent updates? Anyone making progress?
Random Issue Bot (Jan 29 2026 at 14:24):
Today I chose issue #11119 for discussion!
Porting note: @[simp] removed
Created by @Pietro Monticone (@pitmonticone) on 2024-03-02
Labels: porting-notes
Is this issue still relevant? Any recent updates? Anyone making progress?
Johan Commelin (Jan 29 2026 at 14:25):
Only 3 cases remain:
$ rg 11119
Mathlib/AlgebraicTopology/ExtraDegeneracy.lean
264:-- Porting note (https://github.com/leanprover-community/mathlib4/issues/11119): @[simp] removed as the linter complains the LHS is not in normal form
274:-- Porting note (https://github.com/leanprover-community/mathlib4/issues/11119): @[simp] removed as the linter complains the LHS is not in normal form
280:-- Porting note (https://github.com/leanprover-community/mathlib4/issues/11119): @[simp] removed as the linter complains the LHS is not in normal form
Anne Baanen (Jan 29 2026 at 16:34):
Quoting the comments on these lines:
The problem is that the type of docs#ExtraDegeneracy.s is not in normal form, this causes the
erwin the proofs below.
Anyone know what the normal form should be?
Last updated: Feb 28 2026 at 14:05 UTC