Open
Conversation
kbuzzard
reviewed
Apr 6, 2026
| public import Mathlib.RepresentationTheory.Homological.GroupCohomology.LongExactSequence | ||
| public import Mathlib.RepresentationTheory.Induced | ||
|
|
||
| public import Mathlib |
kbuzzard
reviewed
Apr 6, 2026
| -- /-- | ||
| -- The restriction functor `Rep R G ⥤ Rep R H` for a subgroup `H` of `G`. | ||
| -- -/ | ||
| -- def res (f : H →* G) : Rep R G ⥤ Rep R H := Action.res (ModuleCat R) f |
kbuzzard
reviewed
Apr 6, 2026
| instance : (res% R f).IsRightAdjoint := | ||
| (indResAdjunction' R f).isRightAdjoint | ||
| -- instance : (res% R f).IsRightAdjoint := | ||
| -- (indResAdjunction' R f).isRightAdjoint |
Owner
There was a problem hiding this comment.
Remove all this dead code? Unless you need it for some reason?
kbuzzard
reviewed
Apr 6, 2026
| (M ↓ e.toMonoidHom).norm.hom = M.norm.hom := by | ||
| section | ||
|
|
||
| set_option linter.unusedFintypeInType false |
kbuzzard
reviewed
Apr 6, 2026
| public import Mathlib.Data.Finsupp.Notation | ||
| public import Mathlib.FieldTheory.Galois.NormalBasis | ||
| public import Mathlib.RepresentationTheory.FiniteIndex | ||
| public import Mathlib |
kbuzzard
reviewed
Apr 6, 2026
| -- The map `coind₁'_ι` intertwines a representation `ρ` of `G` on `V` with the | ||
| -- representation `ρ.coind₁'` of `G` on `G → V`. | ||
| -- -/ | ||
| -- lemma coind₁'_ι_comm (g : G) : coind₁' ρ g ∘ₗ coind₁'_ι = coind₁'_ι ∘ₗ ρ g := by ext; simp |
kbuzzard
reviewed
Apr 6, 2026
| Representation.coind₁AsPi_apply, Pi.ofNat_apply] | ||
| -- This is equivalent to... | ||
| change ∀ f : G → A, (∀ x, ∑ h : H, f (x * h) = 0) → f ∈ Representation.Coinvariants.ker _ | ||
| -- change ∀ f : G → A, (∀ x, ∑ h : H, f (x * h) = 0) → f ∈ Representation.Coinvariants.ker _ |
kbuzzard
reviewed
Apr 6, 2026
| simp only [res_obj_V, res_obj_ρ, AddSubmonoidClass.coe_finset_sum, SetLike.val_smul, | ||
| coe_finset_sum, coe_smul, Finset.sum_apply, Pi.smul_apply, single_apply, Finset.sum_boole, | ||
| smul_eq_mul] | ||
| -- intro a |
kbuzzard
reviewed
Apr 6, 2026
| -- instance : HasForget₂ (Rep.{w} k G) Ab where | ||
| -- forget₂ := forget₂ (Rep k G) (ModuleCat k) ⋙ (forget₂ _ _) | ||
|
|
||
| -- instance : (forget₂ (Rep.{w} k G) Ab).Additive := ⟨rfl⟩ |
kbuzzard
reviewed
Apr 6, 2026
| (forget₂ (Rep k G) (ModuleCat k)).map f = f.hom := rfl | ||
| -- @[simp] | ||
| -- lemma Rep.forget₂_map {M N : Rep k G} (f : M ⟶ N) : | ||
| -- (forget₂ (Rep k G) (ModuleCat k)).map f = f.hom := rfl |
kbuzzard
reviewed
Apr 6, 2026
| public import Mathlib.RepresentationTheory.Basic | ||
| public import Mathlib.RepresentationTheory.Rep | ||
| public import Mathlib.Data.Finsupp.Single | ||
| -- public import Mathlib.RepresentationTheory.Basic |
kbuzzard
reviewed
Apr 6, 2026
| -- instance : | ||
| -- MulActionHomClass (Action.HomSubtype (ModuleCat R) G (leftRegular R G) (trivial R G R)) | ||
| -- R (leftRegular R G) (trivial R G R) where | ||
| -- map_smulₛₗ f := map_smul f.val |
kbuzzard
reviewed
Apr 6, 2026
| import ClassFieldTheory.Mathlib.Topology.Algebra.Ring.Basic | ||
| import ClassFieldTheory.Mathlib.Topology.Algebra.Valued.NormedValued | ||
| import ClassFieldTheory.Mathlib.Topology.Algebra.Valued.ValuativeRel | ||
| import ClassFieldTheory.Tactic.Dualize |
Owner
There was a problem hiding this comment.
Did you intend to stop using the module system?
kbuzzard
approved these changes
Apr 6, 2026
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
3 participants
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.
No description provided.