Loogle!

Result

Found 5 declarations mentioning StandardEtalePair.map.

• StandardEtalePair.map 📋 Mathlib.RingTheory.Etale.StandardEtale
  {R : Type u_1} {S : Type u_2} [CommRing R] [CommRing S] (P : StandardEtalePair R) (f : R →+* S) : StandardEtalePair S
• StandardEtalePair.map_f 📋 Mathlib.RingTheory.Etale.StandardEtale
  {R : Type u_1} {S : Type u_2} [CommRing R] [CommRing S] (P : StandardEtalePair R) (f : R →+* S) : (P.map f).f = Polynomial.map f P.f
• StandardEtalePair.map_g 📋 Mathlib.RingTheory.Etale.StandardEtale
  {R : Type u_1} {S : Type u_2} [CommRing R] [CommRing S] (P : StandardEtalePair R) (f : R →+* S) : (P.map f).g = Polynomial.map f P.g
• StandardEtalePair.HasMap.map_algebraMap 📋 Mathlib.RingTheory.Etale.StandardEtale
  {R : Type u_1} {S : Type u_2} {T : Type u_3} [CommRing R] [CommRing S] [CommRing T] [Algebra R S] [Algebra R T] (P : StandardEtalePair R) [Algebra S T] [IsScalarTower R S T] {x : T} (H : P.HasMap x) : (P.map (algebraMap R S)).HasMap x
• StandardEtalePresentation.baseChange.eq_1 📋 Mathlib.RingTheory.Smooth.IntegralClosure
  {R : Type u_1} {S : Type u_2} {T : Type u_3} [CommRing R] [CommRing S] [CommRing T] [Algebra R S] [Algebra R T] (P : StandardEtalePresentation R S) : P.baseChange = { P := P.map (algebraMap R T), x := 1 ⊗ₜ[R] P.x, hasMap := ⋯, lift_bijective := ⋯ }

About

Loogle searches Lean and Mathlib definitions and theorems.

You can use Loogle from within the Lean4 VSCode language extension using (by default) Ctrl-K Ctrl-S. You can also try the #loogle command from LeanSearchClient, the CLI version, the Loogle VS Code extension, the lean.nvim integration or the Zulip bot.

Usage

Loogle finds definitions and lemmas in various ways:

1. By constant:
   🔍 Real.sin
   finds all lemmas whose statement somehow mentions the sine function.

2. By lemma name substring:
   🔍 "differ"
   finds all lemmas that have "differ" somewhere in their lemma name.

3. By subexpression:
   🔍 _ * (_ ^ _)
   finds all lemmas whose statements somewhere include a product where the second argument is raised to some power.

   The pattern can also be non-linear, as in
   🔍 Real.sqrt ?a * Real.sqrt ?a

   If the pattern has parameters, they are matched in any order. Both of these will find List.map:
   🔍 (?a -> ?b) -> List ?a -> List ?b
   🔍 List ?a -> (?a -> ?b) -> List ?b

4. By main conclusion:
   🔍 |- tsum _ = _ * tsum _
   finds all lemmas where the conclusion (the subexpression to the right of all → and ∀) has the given shape.

   As before, if the pattern has parameters, they are matched against the hypotheses of the lemma in any order; for example,
   🔍 |- _ < _ → tsum _ < tsum _
   will find tsum_lt_tsum even though the hypothesis f i < g i is not the last.

If you pass more than one such search filter, separated by commas Loogle will return lemmas which match all of them. The search
🔍 Real.sin, "two", tsum, _ * _, _ ^ _, |- _ < _ → _
would find all lemmas which mention the constants Real.sin and tsum, have "two" as a substring of the lemma name, include a product and a power somewhere in the type, and have a hypothesis of the form _ < _ (if there were any such lemmas). Metavariables (?a) are assigned independently in each filter.

The #lucky button will directly send you to the documentation of the first hit.

Source code

You can find the source code for this service at https://github.com/nomeata/loogle. The https://loogle.lean-lang.org/ service is provided by the Lean FRO.

This is Loogle revision 36960b0 serving mathlib revision 9a4cf1d