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/- Copyright (c) 2021 Yury G. Kudryashov. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Yury G. Kudryashov -/ import measure_theory.group.action import measure_theory.group.pointwise import measure_theory.integral.set_integral /-! # Fundamental domain of a group acti...
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/- Copyright (c) 2019 Johannes Hölzl. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Johannes Hölzl, Patrick Massot, Casper Putz, Anne Baanen, Antoine Labelle -/ import linear_algebra.matrix.to_lin import linear_algebra.matrix.trace import linear_algebra.contraction im...
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/- Copyright (c) 2022 Adam Topaz. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Adam Topaz -/ import ring_theory.valuation.integers import ring_theory.ideal.local_ring import ring_theory.localization.fraction_ring import ring_theory.localization.integer import ring_th...
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vm_eval (do { a : nat ← [1, 2, 3, 4], b : nat ← [4, 5, 6], (guard $ 2 * a ≥ b : list unit), (guard $ b < 6 : list unit), return (a, b) } : list (nat × nat) )
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/- Functor -/ import Setoid import Cat import Mor set_option pp.universes true set_option pp.metavar_args false namespace EXE /- - The category of functors -/ namespace Functor -- axioms of functor section withOnHom variables (C D : CatType) (onOb : Π(c : C), D) variables (onHom : Π{X Y :...
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/- Copyright (c) 2018 Mario Carneiro and Kevin Buzzard. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Mario Carneiro, Kevin Buzzard -/ import linear_algebra.finsupp import ring_theory.ideal_operations import ring_theory.subring import linear_algebra.basis open set ...
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import data.matrix.notation import linear_algebra.matrix.determinant import group_theory.perm.fin import tactic.norm_swap variables {α β : Type} [semiring α] [ring β] namespace matrix open_locale matrix example {a a' b b' c c' d d' : α} : ![![a, b], ![c, d]] + ![![a', b'], ![c', d']] = ![![a + a', b + b'], ![c + ...
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import algebra.group.to_additive import algebra.group.units import tactic -- work in a namespace so that it doesn't matter if names clash namespace test @[to_additive bar0] def foo0 {α} [has_mul α] [has_one α] (x y : α) : α := x * y * 1 class {u v} my_has_pow (α : Type u) (β : Type v) := (pow : α → β → α) class my_h...
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/- Copyright (c) 2017 Mario Carneiro. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Mario Carneiro -/ import data.int.basic algebra.associated data.nat.gcd /-- The ring of integers adjoined with a square root of `d`. These have the form `a + b √d` where `a b : ℤ`. ...
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/- Copyright (c) 2021 Eric Wieser. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Eric Wieser -/ import group_theory.subgroup.basic import group_theory.submonoid.pointwise /-! # Pointwise instances on `subgroup` and `add_subgroup`s This file provides the actions * `...
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/- Copyright (c) 2016 Microsoft Corporation. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Leonardo de Moura -/ prelude import init.data.nat.basic init.data.nat.div init.data.nat.lemmas init.data.nat.bitwise
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/- Copyright (c) 2020 Marc Huisinga. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Marc Huisinga, Wojciech Nawrocki -/ import Lean.Data.Json import Lean.Data.Lsp.Basic /-! Section "Text Document Synchronization" of the LSP spec. -/ namespace Lean namespace Lsp ope...
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import temporal_logic set_option profiler true open temporal predicate variables Γ : cpred variables P Q R S : ℕ → cpred include P Q R S example : Γ ⊢ True := begin [temporal] iterate 100 { have : ∀∀ x, P x ⟶ Q x ⟶ R x ⟶ S x, { intros, guard_target S x, admit }, clear this }, trivial end ...
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/- Copyright (c) 2019 Simon Hudon. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Author: Simon Hudon Monad encapsulating continuation passing programming style, similar to Haskell's `Cont`, `ContT` and `MonadCont`: http://hackage.haskell.org/package/mtl-2.2.2/docs/Control-Mon...
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/- Copyright (c) 2018 Sébastien Gouëzel. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Sébastien Gouëzel, Johannes Hölzl, Rémy Degenne -/ import order.filter.cofinite import order.hom.complete_lattice /-! # liminfs and limsups of functions and filters Defines the Li...
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/- Copyright (c) 2017 Mario Carneiro. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Mario Carneiro -/ import data.fintype.basic import data.multiset.sort import data.list.nodup_equiv_fin /-! # Construct a sorted list from a finset. -/ namespace finset open multiset...
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/- Copyright (c) 2022 Joseph Myers. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Joseph Myers, Heather Macbeth -/ import analysis.inner_product_space.two_dim import geometry.euclidean.angle.unoriented.basic /-! # Oriented angles. > THIS FILE IS SYNCHRONIZED WITH MA...
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/- Copyright (c) 2019 Scott Morrison. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Scott Morrison -/ import Mathlib.PrePort import Mathlib.Lean3Lib.init.default import Mathlib.algebra.category.Mon.basic import Mathlib.category_theory.limits.limits import Mathlib.cate...
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/- Copyright (c) 2016 Jeremy Avigad. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Jeremy Avigad, Leonardo de Moura, Mario Carneiro, Johannes Hölzl -/ import algebra.order.group.defs import algebra.order.monoid.basic import algebra.order.group.instances /-! # Pull ba...
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/- Copyright (c) 2019 Jeremy Avigad. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Jeremy Avigad, Benjamin Davidson -/ import data.nat.modeq /-! # Parity of natural numbers This file contains theorems about the `even` and `odd` predicates on the natural numbers. ##...
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/- Copyright (c) 2018 Johannes Hölzl. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Johannes Hölzl, Jens Wagemaker, Anne Baanen -/ import algebra.associated import data.list.big_operators.lemmas import data.list.perm /-! # Products of lists of prime elements. This ...
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/- Copyright (c) 2020 Bhavik Mehta. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Bhavik Mehta -/ import category_theory.adjunction.basic import category_theory.conj /-! # Mate of natural transformations > THIS FILE IS SYNCHRONIZED WITH MATHLIB4. > Any changes to th...
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/- Copyright (c) 2018 Michael Jendrusch. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Michael Jendrusch, Scott Morrison -/ import category_theory.monoidal.types.basic import category_theory.monoidal.coherence_lemmas /-! # `(𝟙_ C ⟶ -)` is a lax monoidal functor to `...
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/- Copyright (c) 2017 Johannes Hölzl. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Johannes Hölzl Extends the theory on functors, applicatives and monads. -/ import Mathlib.PrePort import Mathlib.Lean3Lib.init.default import Mathlib.PostPort universes u v u_1 u_2 u...
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import definitions lemmas lemma reduction_preserves_approximation -- Symbolic state `s₁'`, in 0+ steps, -- continues to approximate the next step of any state `s₁` it currently approximates {s₁ s₂ s₁' : s} (s₁'_wellformed: s_wellformed s₁') (concrete_reduction: s₁ ~> s₂ ) (approximation : s₁ ⊑ s₁'): ∃ s...
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import Lake open System Lake DSL package prv @[default_target] lean_lib Prv
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/- Copyright (c) 2019 Simon Hudon. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Author(s): Simon Hudon -/ import category_theory.category /-! # Tools to reformulate category-theoretic axioms in a more associativity-friendly way ## The `reassoc` attribute The `reassoc` attr...
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/- Copyright (c) 2020 Sebastian Ullrich. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Sebastian Ullrich -/ import Lean.Delaborator import Lean.PrettyPrinter.Parenthesizer import Lean.PrettyPrinter.Formatter import Lean.Parser.Module import Lean.ParserCompiler namesp...
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import game.world10.level5 -- hide namespace mynat -- hide /- # Inequality world. ## Level 6: `le_antisymm` In Advanced Addition World you proved `eq_zero_of_add_right_eq_self (a b : mynat) : a + b = a → b = 0`. This might be useful in this level. -/ /- Lemma ≤ is antisymmetric. In other words, if a ≤ b and b ≤...
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import data.list open nat list section parameter {A : Type} parameter (p : A → Prop) parameter [H : decidable_pred p] include H definition filter : list A → list A | filter nil := nil | filter (a :: l) := if p a then a :: filter l else filter l theorem filter_nil : filter nil = nil := rfl t...
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/- Copyright (c) 2020 Riccardo Brasca. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Riccardo Brasca -/ import algebra.polynomial.big_operators import analysis.complex.roots_of_unity import data.polynomial.lifts import field_theory.separable import field_theory.split...
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/- Copyright (c) 2015 Microsoft Corporation. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Leonardo de Moura, Jeremy Avigad List permutations. -/ import .basic .comb .set -- TODO(Jeremy): Here is a common idiom: after simplifying, we have a goal 1 + t = nat.succ t -...
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/- Copyright (c) 2021 Jannis Limperg. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Jannis Limperg -/ -- TODO clean up this test case import Lean.Aesop inductive Even : Nat → Prop | zero : Even Nat.zero | plus_two {n} : Even n → Even (Nat.succ (Nat.succ n)) induct...
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/- Copyright (c) 2021 Aaron Anderson. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Aaron Anderson -/ import ring_theory.hahn_series import ring_theory.localization /-! # Laurent Series ## Main Definitions * Defines `laurent_series` as an abbreviation for `hahn_seri...
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/- Copyright (c) 2019 Microsoft Corporation. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Leonardo de Moura, Sebastian Ullrich -/ prelude import Init.Lean.Parser.Parser namespace Lean namespace Parser @[init mkBuiltinParsingTablesRef] constant builtinLevelParsingTa...
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/- Copyright (c) 2019 Jan-David Salchow. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Jan-David Salchow The space of bounded linear maps Define the set of bounded linear maps between normed spaces and show basic facts about it. In particular (*) define a set L(E,F...
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/- Copyright (c) 2021 Jordan Brown, Thomas Browning, Patrick Lutz. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Jordan Brown, Thomas Browning, Patrick Lutz -/ import group_theory.abelianization import data.bracket /-! # Solvable Groups In this file we introduce th...
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/- Copyright (c) 2018 Simon Hudon. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Simon Hudon, Patrick Massot -/ import algebra.module import ring_theory.subring import ring_theory.prod open_locale big_operators /-! # Pi instances for algebraic structures -/ namespa...
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def some_lets : ℕ → ℕ → ℕ | 0 v := v | (nat.succ n) v := let k := some_lets n v + some_lets n v in some_lets n k def some_unfolded_lets (n : ℕ) : Σ' v : ℕ , v = some_lets 5 n := begin econstructor; dunfold some_lets; econstructor end meta def foo : tactic unit := do [g] <- tactic.get_goals, tactic...
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inductive day := monday, tuesday, wednesday, thursday, friday, saturday, sunday open day definition next_weekday : day → day, next_weekday monday := tuesday, next_weekday tuesday := wednesday, next_weekday wednesday := thursday, next_weekday thursday := friday, next_weekday _ := monday theorem next_wee...
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import data.rat namespace rat lemma mk_with_one_eq_cast (n : ℤ) : mk n 1 = n := by {rw[← of_int_eq_mk n,← coe_int_eq_of_int],} lemma mk_nat_with_one_eq_cast (n : ℤ) : mk_nat n 1 = n := calc mk_nat n 1 = mk n (int.of_nat 1) : rfl ... = n : mk_with_one_eq_cast n lemma mk_pnat_with_one_eq_cast (n : ℤ) : mk_pna...
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import algebra.category.basic open category inductive my_functor {obC obD : Type} (C : category obC) (D : category obD) : Type := mk : Π (obF : obC → obD) (homF : Π{A B : obC}, hom A B → hom (obF A) (obF B)), (Π {A : obC}, homF (ID A) = ID (obF A)) → (Π {A B C : obC} {f : hom A B} {g : hom B C}, homF (g ∘ f) =...
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import Lean.Parser def test : IO Unit := if System.Platform.isWindows then pure () -- TODO investigate why the following doesn't work on Windows else do let env ← Lean.mkEmptyEnvironment; discard <| Lean.Parser.testParseFile env (System.mkFilePath ["..", "..", "..", "src", "Init", "Prelude.lean"]); IO.println ...
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/- Copyright (c) 2022 Sébastien Gouëzel. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Sébastien Gouëzel -/ import probability.notation import probability.integration /-! # Variance of random variables We define the variance of a real-valued random variable as `Var[...
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/- Copyright (c) 2019 Reid Barton. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Sébastien Gouëzel -/ import topology.constructions /-! # Neighborhoods and continuity relative to a subset This file defines relative versions * `nhds_within` of `nhds` * `co...
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structure {u v} emb (A : Sort u) (B : Sort v) := (f : A → B) (g : B → A) (gf : Π x, g (f x) = x) notation a ` ≲ ` b := emb a b
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-- import data.subtype open nat subtype check {x : nat| x > 0 }
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/- Copyright (c) 2017 Johannes Hölzl. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Johannes Hölzl, Jeremy Avigad, Yury Kudryashov -/ import order.filter.cofinite import order.zorn /-! # Ultrafilters An ultrafilter is a minimal (maximal in the set order) proper filt...
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import topology.separation import topology.subset_properties variables {X Y : Type*} [topological_space X] [topological_space Y] lemma is_totally_disconnected_of_totally_disconnected_space [totally_disconnected_space X] (s : set X) : is_totally_disconnected s := λ t hts ht, totally_disconnected_space.is_totally_d...
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/- This file imports many useful tactics ("the kitchen sink"). You can use `import tactic` at the beginning of your file to get everything. (Although you may want to strip things down when you're polishing.) Because this file imports some complicated tactics, it has many transitive dependencies (which of course may n...
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/- Copyright (c) 2019 Simon Hudon. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Author: Simon Hudon -/ import algebra.order_functions namespace tactic.interactive open tactic list open lean lean.parser interactive open interactive.types @[derive inhabited] structure mono_cf...
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/- Copyright (c) 2018 Mario Carneiro. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Mario Carneiro, Chris Hughes -/ import ring_theory.coprime import ring_theory.ideals noncomputable theory open_locale classical open euclidean_domain set ideal theorem span_gcd {α} [e...
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/- Copyright (c) 2019 Microsoft Corporation. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Sebastian Ullrich -/ import Lean.Data.Name import Lean.Data.Options import Lean.Data.Format namespace Lean /- Remark: `MonadQuotation` class is part of the `Init` package and l...
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example (n : nat) (m : nat) : n > m → m < n := begin with_cases { revert m, induction n }, case nat.zero : m' { show 0 > m' → m' < 0, sorry }, case nat.succ : n' ih m' { show nat.succ n' > m' → m' < nat.succ n', sorry } end example (n : nat) (m : nat) : n > m → m < n := begin with_cases { revert m, induction n...
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/- Copyright (c) 2017 Microsoft Corporation. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Luke Nelson, Jared Roesch and Leonardo de Moura -/ import data.buffer inductive io.error | other : string → io.error | sys : nat → io.error structure io.terminal (m ...
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import ..int ..simp_omega ..term ..logic namespace int @[derive has_reflect] inductive preterm : Type | cst : int → preterm | var : int → nat → preterm | add : preterm → preterm → preterm notation `&` k := preterm.cst k infix `**` : 300 := preterm.var notation t `+*` s := preterm.add t s -- | (& i) := sorry -- ...
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/- Copyright (c) 2018 Microsoft Corporation. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Leonardo de Moura -/ import Lean.Data.Name namespace Lean inductive DataValue where | ofString (v : String) | ofBool (v : Bool) | ofName (v : Name) | ofNat (v :...
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/- Copyright (c) 2015 Microsoft Corporation. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Mario Carneiro -/ import data.bool.all_any import data.list.perm /-! # Multisets These are implemented as the quotient of a list by permutations. ## Notation We define the glob...
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/- Copyright (c) 2022 Matej Penciak. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Matej Penciak, Moritz Doll, Fabien Clery -/ import linear_algebra.matrix.nonsingular_inverse /-! # The Symplectic Group This file defines the symplectic group and proves elementary p...
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/- Copyright (c) 2018 Chris Hughes. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Chris Hughes -/ import data.pfun import tactic.norm_num import data.equiv.mul_add /-! # Natural numbers with infinity The natural numbers and an extra `top` element `⊤`. ## Main defin...
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/- Copyright (c) 2018 Robert Y. Lewis. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Robert Y. Lewis -/ import data.padics.padic_norm import analysis.normed_space.basic /-! # p-adic numbers This file defines the p-adic numbers (rationals) ℚ_p as the completion of ℚ...
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/- Copyright (c) 2021 Yaël Dillies, Bhavik Mehta. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Yaël Dillies, Bhavik Mehta -/ import analysis.special_functions.log import combinatorics.simple_graph.degree_sum import combinatorics.pigeonhole import data.set.equitable i...
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/- Copyright (c) 2021 Luke Kershaw. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Luke Kershaw -/ import category_theory.additive.basic import category_theory.shift import category_theory.preadditive.additive_functor /-! # Triangles This file contains the definition...
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variable a : user_attribute string variable b : string #check a = b
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/- Copyright (c) 2020 David Wärn. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: David Wärn -/ import category_theory.natural_isomorphism import category_theory.eq_to_hom /-! # Quotient category Constructs the quotient of a category by an arbitrary family of relation...
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def g : List Nat → List Nat → Nat | [], y::ys => y | [], ys => 0 | x1::x2::xs, ys => g xs ys | x::xs, y::ys => g xs ys + y | x::xs, [] => g xs [] universes u v inductive Imf {α : Type u} {β : Type v} (f : α → β) : β → Type (max u v) | mk : (a : α) → Imf f (f a) def h {α β} {f : α...
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import analysis.topology.continuity import analysis.topology.topological_space import analysis.topology.infinite_sum import analysis.topology.topological_structures import analysis.topology.uniform_space universes u v w open set filter lattice classical def empty_set_topology : topological_space empty := { is_open ...
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/- Copyright (c) 2020 Scott Morrison. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Scott Morrison -/ import algebra.category.Module.monoidal import algebra.category.Algebra.basic import category_theory.monoidal.Mon_ /-! # `Mon_ (Module R) ≌ Algebra R` The category...
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/- This file contains the start of an Elf parser for Lean. It currently has facilities for parsing Elf -/ import system.io import init.category.reader def repeat {α : Type} {m : Type → Type} [applicative m] : ℕ → m α → m (list α) | 0 m := pure [] | (nat.succ n) m := list.cons <$> m <*> repeat n m def forM' {m : Typ...
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/- Copyright (c) 2020 Kenny Lau. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Kenny Lau -/ import ring_theory.algebra_tower import linear_algebra.matrix.finite_dimensional import linear_algebra.matrix.to_lin /-! # Tower of field extensions In this file we prove th...
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/- page 81 -/ import standard import data.prod open prod namespace hide -- BEGIN definition pr1 {A B : Type} (p : A × B) : A := prod.rec_on p (λ a b, a) definition pr2 {A B : Type} (p : A × B) : B := prod.rec_on p (λ a b, b) -- END end hide
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/- Copyright (c) 2017 Johannes Hölzl. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Johannes Hölzl, Johan Commelin, Mario Carneiro -/ import algebra.ring import data.finsupp data.polynomial data.equiv.algebra /-! # Multivariate polynomials This file defines polynom...
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/- Copyright (c) 2014 Microsoft Corporation. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Leonardo de Moura, Mario Carneiro Binary representation of integers using inductive types. Note: Unlike in Coq, where this representation is preferred because of the reliance ...
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/- Copyright (c) 2022 Yaël Dillies. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Yaël Dillies -/ import group_theory.group_action.defs /-! # Sum instances for additive and multiplicative actions This file defines instances for additive and multiplicative actions on...
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/- Copyright (c) 2018 Kenny Lau. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Kenny Lau -/ import tactic.ring data.quot ring_theory.ideals universe u namespace localization variables (α : Type u) [comm_ring α] (S : set α) [is_submonoid α S] def r : α × S → α × S ...
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/- This is the final correctenss theorem, stated in terms of the autogenerated constraints. The statements of theorems only depend on the data and constraints specified in `constraints_autogenerated.lean` and the machine semantics in `cpu.lean`. -/ import starkware.cairo.lean.semantics.air_encoding.correctness import ...
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/- Copyright (c) 2014 Jeremy Avigad. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Author: Jeremy Avigad, Andrew Zipperer, Haitao Zhang, Minchao Wu, Yury Kudryashov -/ import data.set.basic import logic.function.basic /-! # Functions over sets ## Main definitions ### Predic...
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open nat open eq set_option pp.coercions true namespace foo theorem trans {a b c : nat} (H1 : a = b) (H2 : b = c) : a = c := trans H1 H2 end foo open foo theorem tst (a b : nat) (H0 : b = a) (H : b = 0) : a = 0 := have H1 : a = b, from symm H0, foo.trans H1 H definition f (a b : nat) := let x := 3 in a + x
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/- Copyright (c) 2020 Scott Morrison. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Lucas Allen, Scott Morrison -/ import tactic.interactive import tactic.converter.interactive /-! ## Introduce the `apply_congr` conv mode tactic. `apply_congr` will apply congruence ...
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import data.real.basic tactic.find variables {Ω : Type*} {α : Type*} open set local attribute [instance] classical.prop_decidable noncomputable theory lemma union_diff_eq_union (s t : set α) : s ∪ (t \ s) = s ∪ t := set.ext $ λ x, or.by_cases (classical.em (x ∈ s)) (λ h, by simp [h]) (λ h, by simp [h]) @[simp] ...
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/- Copyright (c) 2020 Microsoft Corporation. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Leonardo de Moura, Sebastian Ullrich -/ import Lean.Util.CollectLevelParams import Lean.Elab.DeclUtil import Lean.Elab.DefView import Lean.Elab.Inductive import Lean.Elab.Struct...
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/- Copyright (c) 2020 Kenny Lau. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Kenny Lau, Thomas Browning, Patrick Lutz -/ import field_theory.adjoin import field_theory.tower import group_theory.solvable import ring_theory.power_basis /-! # Normal field extensions ...
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/- Copyright (c) 2017 Scott Morrison. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Tim Baumann, Stephen Morgan, Scott Morrison, Floris van Doorn -/ import category_theory.functor import tactic.reassoc_axiom /-! # Isomorphisms This file defines isomorphisms between ...
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/- Copyright (c) 2020 Microsoft Corporation. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Leonardo de Moura, Sebastian Ullrich -/ import Lean.Meta.Tactic.Util import Lean.Util.ForEachExpr import Lean.Util.OccursCheck import Lean.Elab.Tactic.Basic namespace Lean.Elab...
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/- Copyright (c) 2015 Microsoft Corporation. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Author: Leonardo de Moura Quotient types. -/ prelude import init.sigma init.setoid init.logic open sigma.ops setoid constant quot.{l} : Π {A : Type.{l}}, setoid A → Type.{l} -- Remar...
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/- Copyright (c) 2019 Scott Morrison. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Scott Morrison -/ import Mathlib.PrePort import Mathlib.Lean3Lib.init.default import Mathlib.algebra.ring.pi import Mathlib.algebra.category.CommRing.basic import Mathlib.algebra.categ...
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/- Copyright (c) 2015 Floris van Doorn. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Floris van Doorn Quotient of a reflexive relation -/ import homotopy.circle cubical.squareover .two_quotient open eq simple_two_quotient e_closure namespace refl_quotient sectio...
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/- Copyright (c) 2021 Sébastien Gouëzel. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Sébastien Gouëzel -/ import analysis.normed_space.hahn_banach.extension import measure_theory.measure.lebesgue /-! # A counterexample on Pettis integrability There are several the...
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/- Copyright (c) 2021 Heather Macbeth. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Heather Macbeth, Yury Kudryashov -/ import topology.order.basic /-! # Bounded monotone sequences converge In this file we prove a few theorems of the form “if the range of a monoton...
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import algebra.ordered_ring variables {R : Type*} [ordered_ring R] variables a b c : R -- BEGIN example : a ≤ b → 0 ≤ b - a := sorry example : 0 ≤ b - a → a ≤ b := sorry example (h : a ≤ b) (h' : 0 ≤ c) : a * c ≤ b * c := sorry -- END
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/- Copyright (c) 2015 Leonardo de Moura. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Module: data.list.as_type Authors: Leonardo de Moura -/ import data.list.basic namespace list structure as_type {A : Type} (l : list A) : Type := (value : A) (is_member : value ∈ l) names...
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/- Copyright (c) 2022 Jireh Loreaux. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Jireh Loreaux -/ import analysis.normed_space.lp_space import analysis.normed_space.pi_Lp import topology.continuous_function.bounded /-! # Equivalences among $$L^p$$ spaces In this f...
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def even (a : ℕ) := ∃ b, a = 2 * b example (h : 10 = 2 * 5) : even 10 := begin exact exists.intro 5 h end
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/- Copyright (c) 2018 Chris Hughes. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Chris Hughes, Abhimanyu Pallavi Sudhir, Jean Lo, Calle Sönne -/ import analysis.special_functions.exp /-! # Real logarithm In this file we define `real.log` to be the logarithm of a re...
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open tactic namespace X1 inductive Foo : unit -> Type | mk : Foo () -> Foo () instance (u : unit) : decidable_eq (Foo u) := by mk_dec_eq_instance end X1 namespace X2 inductive Foo : bool -> bool -> Type | mk₁ : Foo tt tt | mk₂ : Foo ff ff -> Foo tt ff instance (idx₁ idx₂ : bool) : decidable_eq (Foo idx₁ idx₂) :=...
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/- Copyright (c) 2021 Scott Morrison. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Scott Morrison -/ import category_theory.preadditive import algebra.module.linear_map import algebra.invertible import linear_algebra.basic import algebra.algebra.basic /-! # Linear c...
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/- Copyright © 2020 Nicolò Cavalleri. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Nicolò Cavalleri -/ import data.set.Union_lift import topology.homeomorph /-! # Continuous bundled maps In this file we define the type `continuous_map` of continuous bundled maps. ...
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lemma example1 (x y z : mynat) : x * y + z = x * y + z := begin refl, end
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/- Copyright (c) 2022 Anatole Dedecker. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Moritz Doll -/ import analysis.locally_convex.bounded import data.is_R_or_C.basic /-! # Continuity and Von Neumann boundedness This files proves that for `E` and `F` two topologica...
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/- Copyright (c) 2021 Jakob Scholbach. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Jakob Scholbach -/ import algebra.char_p.basic import data.nat.prime /-! # Exponential characteristic This file defines the exponential characteristic and establishes a few basic re...