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import .tactics lemma {u v} congr_refl {α : Sort u} {β : Sort v} {f₁ f₂ : α → β} (h₁ : f₁ = f₂) (a : α) : congr h₁ (eq.refl a) = congr_fun h₁ a := begin reflexivity, end lemma {u v} symm_congr_fun {α : Sort u} {β : α → Sort v} {f g : Π x, β x} (h : f = g) (a : α) : eq.symm (congr_fun h a) = congr_fun (eq.symm h) a ...
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/- Copyright (c) 2022 Praneeth Kolichala. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Praneeth Kolichala -/ import category_theory.groupoid import algebraic_topology.fundamental_groupoid.basic import topology.category.Top.limits import topology.homotopy.product /-...
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/- Copyright (c) 2018 Johan Commelin. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Johan Commelin -/ import deprecated.subgroup import deprecated.group universes u v open group variables {R : Type u} [ring R] section prio set_option default_priority 100 -- see No...
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class has_note (M : Type) where note : M notation "♩" => has_note.note class has_note2 (M : Type) extends has_note M variable {ι : Type} (β : ι → Type) structure foo [∀ i, has_note (β i)] : Type where to_fun : ∀ i, β i instance foo.has_note [∀ i, has_note (β i)] : has_note (foo (λ i => β i)) where note := { ...
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/- Copyright (c) 2018 Scott Morrison. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Scott Morrison, Reid Barton, Bhavik Mehta -/ import category_theory.limits.limits /-! # Preservation and reflection of (co)limits. There are various distinct notions of "preserving l...
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/- Copyright (c) 2017 Kenny Lau. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Kenny Lau, Mario Carneiro, Johannes Hölzl, Chris Hughes, Jens Wagemaker, Jon Eugster -/ import algebra.group.basic import logic.unique import tactic.nontriviality /-! # Units (i.e., invert...
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/- Copyright (c) 2020 Aaron Anderson. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Aaron Anderson -/ import order.modular_lattice import order.well_founded /-! # Atoms, Coatoms, and Simple Lattices > THIS FILE IS SYNCHRONIZED WITH MATHLIB4. > Any changes to this fi...
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import system.io open list io /- B and unit must be in the same universe So, we must put B at Type₁ or use poly_unit since unit is at Type₁ -/ definition foreach {A : Type} {B : Type} : list A → (A → io B) → io punit | [] f := return punit.star | (x::xs) f := do f x, foreach xs f #eval foreach [1,2,3,4,5]...
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/- Copyright (c) 2022 Microsoft Corporation. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Leonardo de Moura -/ import Lean.Compiler.LCNF.ReduceJpArity import Lean.Compiler.LCNF.Renaming import Lean.Compiler.LCNF.Simp.Basic import Lean.Compiler.LCNF.Simp.FunDeclInfo i...
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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 -/ import Lean.Environment namespace Lean /- Scope management TODO: delete after we delete parser implemented in C++. We have decided to store scope informa...
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import galois.logic import tactic.fin_cases namespace char /-- Predicate that holds if character is a 7-bit ascii printable character. -/ def is_ascii7_printable (c:char) : Prop := 0x20 ≤ c.val ∧ c.val ≤ 0x7e local attribute [reducible] is_ascii7_printable namespace is_ascii7_printable instance decidable : decidabl...
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set_option maxRecDepth 10000 universe i def CNat : Type 1 := ∀ (N : Type), (N → N) → N → N def czero : CNat := λ n s z => z def csuc : CNat → CNat := λ a n s z => s (a n s z) def Vec : Type → CNat → Type 1 := λ A n => ∀ (V : CNat → Type), (∀ n, A → V n → V (csuc n)) → V czero → V n def nil {A:Type} : Vec A czero ...
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/- Copyright (c) 2020 Anne Baanen. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Anne Baanen -/ import algebra.group.units import algebra.ne_zero import algebra.ring.basic /-! # Invertible elements This file defines a typeclass `invertible a` for elements `a` with ...
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/- Tests for norm_cast -/ import tactic.norm_cast import data.complex.basic -- ℕ, ℤ, ℚ, ℝ, ℂ constants (an bn cn dn : ℕ) (az bz cz dz : ℤ) (aq bq cq dq : ℚ) constants (ar br cr dr : ℝ) (ac bc cc dc : ℂ) example : (an : ℤ) = bn → an = bn := λ h, by exact_mod_cast h -- by simp example : an = bn → (an : ℤ) = bn := λ h,...
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/- # The Natural Number Game, version 1.2rc2 ## By Kevin Buzzard and Mohammad Pedramfar. Works in Chrome. Usually works in other browsers. If you see "Lean is busy" and it hasn't gone away after about 20 seconds, try Chrome. Recent Firefox works fine. Safari 13.0.3 has been reported not to work, but Safari 13.1 appa...
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import data.nat.basic open fin nat /-- Embedding of `fin n` in `fin (n+1)` -/ def raise_fin {n : ℕ} (k : fin n) : fin (n + 1) := ⟨val k, lt_succ_of_lt (is_lt k)⟩ theorem eq_of_lt_succ_of_not_lt {a b : ℕ} (h1 : a < b + 1) (h2 : ¬ a < b) : a = b := have h3 : a ≤ b, from le_of_lt_succ h1, or.elim (eq_or_lt_of_not_lt h2...
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universe variables u inductive Vec (α : Type u) : nat → Type u | nil {} : Vec 0 | cons : Π {n}, α → Vec n → Vec (nat.succ n) def head {α} : Π {n}, Vec α (n+1) → α | n (Vec.cons h t) := h #check @head.equations._eqn_1
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/- Copyright (c) 2020 Johan Commelin. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Johan Commelin -/ import analysis.special_functions.trigonometric import ring_theory.roots_of_unity /-! # Complex roots of unity In this file we show that the `n`-th complex roots of...
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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 -/ import tactic.norm_num /-! # `ring` Evaluate expressions in the language of commutative (semi)rings. Based on <http://www.cs.ru.nl/~freek/courses/tt-2014/read/10.1....
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/- Copyright (c) 2020 Anne Baanen. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Anne Baanen -/ import ring_theory.localization import ring_theory.principal_ideal_domain /-! # Fractional ideals This file defines fractional ideals of an integral domain and proves bas...
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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 category_theory.monoidal.braided import category_theory.functor.category import category_theory.functor.const /-! # Monoidal structure on `C ⥤ D` when `D` is ...
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/- Copyright (c) 2022 David Loeffler. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: David Loeffler -/ import measure_theory.integral.interval_integral import measure_theory.integral.integral_eq_improper /-! # Integrals with exponential decay at ∞ > THIS FILE IS SYNC...
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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 -/ import Lean.Util.SCC import Lean.Elab.PreDefinition.Basic import Lean.Elab.PreDefinition.Structural import Lean.Elab.PreDefinition.WF.Main import Lean.Elab....
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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 -/ prelude import Init.Data.Array.Basic universe u v -- TODO: CLEANUP namespace Array -- TODO: remove the [Inhabited α] parameters as soon as we have the tac...
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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, Mario Carneiro, Patrick Massot Theory of topological groups. -/ import order.filter.pointwise import group_theory.quotient_group import topology.algebra.monoid import...
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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: Sébastien Gouëzel, Floris van Doorn, Mario Carneiro, Martin Dvorak -/ import data.list.big_operators.basic /-! # Join of a list of lists > THIS FILE IS SYNCHRONIZED WITH MATHLIB4. > ...
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section sigma_types variable α : Type variable β : α → Type variable a : α variable b : β a #check sigma.mk a b #check (sigma.mk a b).1 #check (sigma.mk a b).2 #reduce (sigma.mk a b).1 #reduce (sigma.mk a b).2 end sigma_types
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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, Mario Carneiro, Yury Kudryashov -/ import tactic.tfae import order.liminf_limsup import data.set.intervals.image_preimage import data.set.intervals.ord_connected import...
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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, Egbert Rijke -/ import hit.colimit .sequence cubical.squareover types.arrow types.equiv cubical.pathover2 open eq nat sigma sigma.ops quotient equiv pi is_t...
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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 -/ import algebra.algebra.basic import algebra.field.basic import algebra.group.type_tags import ring_theory.ideal.local_ring import data.equiv.basic /-! # Transfer alg...
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/- Copyright (c) 2021 Julian Kuelshammer. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Julian Kuelshammer -/ import group_theory.order_of_element import algebra.gcd_monoid.finset import algebra.punit_instances import data.nat.factorization.basic import tactic.by_cont...
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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 Zorn's lemmas. Ported from Isabelle/HOL (written by Jacques D. Fleuriot, Tobias Nipkow, and Christian Sternagel). -/ import data.set.lattice noncomputable theory univ...
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/- Copyright (c) 2020 Sébastien Gouëzel. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Sébastien Gouëzel -/ import topology.algebra.module import linear_algebra.multilinear /-! # Continuous multilinear maps We define continuous multilinear maps as maps from `Π(i : ι...
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example (xs : list ℕ) : ℕ := begin induction xs, case list.cons {} end example (xs : list ℕ) : ℕ := begin cases xs, case list.cons {} end example (xs : list ℕ) : ℕ := begin induction xs, case list.cons : x xs { cases xs, case list.cons : x xs {} } end open list example (xs : list ℕ) : ℕ := begi...
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/- Copyright (c) 2022 Yury Kudryashov. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Yury Kudryashov -/ import measure_theory.measure.measure_space /-! # Measures positive on nonempty opens In this file we define a typeclass for measures that are positive on nonempt...
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import standard using tactic inductive sum (A : Type) (B : Type) : Type := | inl : A → sum A B | inr : B → sum A B theorem inl_inhabited {A : Type} (B : Type) (H : inhabited A) : inhabited (sum A B) := inhabited_elim H (λ a, inhabited_intro (inl B a)) theorem inr_inhabited (A : Type) {B : Type} (H : inhabited B) :...
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import logic data.nat.basic data.prod data.unit open nat prod inductive vector (A : Type) : nat → Type := | vnil {} : vector A zero | vcons : Π {n : nat}, A → vector A n → vector A (succ n) namespace vector print definition vector.no_confusion infixr `::` := vcons namespace play section universe variab...
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notation `⟪`:max t:(foldr `,` (e r, and.intro e r)) `⟫`:0 := t check ⟪ trivial, trivial, trivial ⟫ theorem tst (a b c d : Prop) : a ∧ b ∧ c ∧ d ↔ d ∧ c ∧ b ∧ a := begin apply iff.intro, begin intro H, match H with | ⟪ H₁, H₂, H₃, H₄ ⟫ := ⟪ H₄, H₃, H₂, H₁ ⟫ end end, begin intro H, match...
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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 import algebra.parity /-! # Parity of natural numbers This file contains theorems about the `even` and `odd` predicates on th...
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inductive vec (A : Type*) : nat -> Type* | vnil : vec 0 | vcons : Pi (n : nat), A -> vec n -> vec (n+1) inductive tree (A : Type*) | leaf : A -> tree | node : Pi (n : nat), vec (list (list tree)) n -> tree -- set_option trace.eqn_compiler true constant P {A : Type*} : tree A → Type constant mk1 {A : Type*} (a : A) :...
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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 Helper tactic for showing that a type has decidable equality. -/ prelude import init.meta.contradiction_tactic init.meta.constructor_tactic import init.meta.i...
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/- Copyright (c) 2020 Thomas Browning and Patrick Lutz. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Thomas Browning and Patrick Lutz -/ import deprecated.subfield import linear_algebra.finite_dimensional /-! # Adjoining Elements to Fields In this file we introduc...
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def Sequence (α : Type) := List α def BigBody (β α) := α × (β → β → β) × Bool × β def applyBig {α β : Type} (body : BigBody β α) (x : β) : β := let (_, op, b, v) := body; if b then op v x else x def reducebig {α β : Type} (idx : β) (r : Sequence α) (body : α → BigBody β α) : β := r.foldr (applyBig ∘ body) idx def ...
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/- Copyright (c) 2020 Robert Y. Lewis. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Robert Y. Lewis -/ import meta.rb_map import tactic.ring import tactic.linarith.lemmas /-! # Datatypes for `linarith` Some of the data structures here are used in multiple parts of...
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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, Mitchell Rowett, Scott Morrison -/ import group_theory.submonoid open set function variables {α : Type*} {β : Type*} {s : set α} {a a₁ a₂ b c: α} section group variab...
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/- Copyright (c) 2019 Simon Hudon. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Simon Hudon -/ import logic.equiv.defs import tactic.basic /-! # Monad > THIS FILE IS SYNCHRONIZED WITH MATHLIB4. > Any changes to this file require a corresponding PR to mathlib4. ## ...
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import data.list.basic open list universe u variables {α : Type} (x y z : α) (xs ys zs : list α) def mk_symm (xs : list α) := xs ++ reverse xs theorem reverse_mk_symm (xs : list α) : reverse (mk_symm xs) = mk_symm xs := by simp [mk_symm] section local attribute [simp] reverse_mk_symm example (xs ys : list ℕ) : ...
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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 Lebesgue measure on the real line -/ import measure_theory.measure_space measure_theory.borel_space noncomputable theory open classical set lattice filter open nnreal (...
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definition id1 {A : Type} (a : A) : A := a definition id2 (A : Type) (a : A) : A := a (* local t1 = get_env():find("id1"):type() local t2 = get_env():find("id2"):type() assert(t1:hash() == t2:hash()) assert(t1:hash_bi() ~= t2:hash_bi()) *)
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universes u v def monic {α : Type u} {β : Type v} (f : α → β) := ∀ x y, f x = f y → x = y section johnstone open true variables (p : Prop) (φ : Prop → Prop) (μ : monic φ) theorem johnstone : φ (φ p) = p := let UT := {q // φ q}, VT := {q // φ q ∧ q}, UP := ∃ q, φ q, VP := ∃ q, φ q ∧ q, ...
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/- Copyright (c) 2021 Tian Chen. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Tian Chen -/ import analysis.special_functions.sqrt /-! # IMO 2006 Q3 > THIS FILE IS SYNCHRONIZED WITH MATHLIB4. > Any changes to this file require a corresponding PR to mathlib4. Deter...
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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.data.fintype.basic import Mathlib.category_theory.discrete_category import Mathlib.PostPort...
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set_option pp.universes true set_option pp.implicit true section universe k parameter A : Type section universe variable l universe variable u parameter B : Type definition foo (a : A) (b : B) := b inductive mypair | mk : A → B → mypair print mypair.rec check mypair.mk def...
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/- Copyright (c) 2021 Adam Topaz. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Adam Topaz -/ import category_theory.sites.compatible_sheafification import category_theory.adjunction.whiskering /-! In this file, we show that an adjunction `F ⊣ G` induces an adjuncti...
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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 -/ import algebra.big_operators.intervals import topology.instances.real import topology.algebra.module import data.indicator_function import data.equiv.encodable.lattic...
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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 > THIS FILE IS...
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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, Sean Leather Functions on lists of sigma types. -/ import data.list.perm data.sigma universes u v namespace list variables {α : Type u} {β : α → Type v} /- keys -/ ...
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import Mathlib.PrePort import Mathlib.Lean3Lib.init.data.nat.basic import Mathlib.Lean3Lib.init.data.string.basic namespace Mathlib def lean.version : ℕ × ℕ × ℕ := (bit1 1, bit0 (bit1 (bit0 (bit1 1))), 0) def lean.githash : string := sorry def lean.is_release : Bool := to_bool (1 ≠ 0) /-- Additional version descri...
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import game.world8.level7 -- hide namespace mynat -- hide /- # Advanced Addition World ## Level 8: `eq_zero_of_add_right_eq_self` The lemma you're about to prove will be useful when we want to prove that $\leq$ is antisymmetric. There are some wrong paths that you can take with this one. -/ /- Lemma If $a$ and $b$...
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/- Copyright (c) 2015 Haitao Zhang. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Author : Haitao Zhang -/ import theories.number_theory.primes data algebra.group algebra.group_power algebra.group_bigops .cyclic .finsubg .hom .perm .action open nat fin list algebra function...
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import system.random.basic import data.nat.prime import data.zmod.basic /-- fermat's primality test -/ def primality_test (p : ℕ) (h : fact (0 < p)) : rand bool := if h : 2 ≤ p-1 then do n ← rand.random_r 2 (p-1) h, return $ (n : zmod p)^(p-1) = 1 -- we do arithmetic with `zmod n` so that modulo and multiplicatio...
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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, Johannes Hölzl, Scott Morrison, Jens Wagemaker -/ import data.polynomial.induction import data.polynomial.degree.definitions import deprecated.ring /-! # Theory of univari...
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namespace Ex1 inductive Ty where | int | bool | fn (a ty : Ty) @[reducible] def Ty.interp : Ty → Type | int => Int | bool => Bool | fn a b => a.interp → b.interp def test {a b c : Ty} (f : a.interp → b.interp → c.interp) (x : a.interp) (y : b.interp) : c.interp := f x y def f (a b : Ty.bool.inter...
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/- Copyright (c) 2021 Andrew Yang. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Andrew Yang -/ import topology.category.Top import category_theory.glue_data import category_theory.concrete_category.elementwise /-! # Gluing Topological spaces Given a family of gluin...
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/- Copyright (c) 2015 Haitao Zhang. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Author: Haitao Zhang Cardinality for finite types. -/ import .basic data.list data.finset.card open eq.ops nat function list finset namespace fintype definition card [reducible] (A : Type) [fi...
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/- Copyright (c) 2020 Floris van Doorn. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Floris van Doorn, Yaël Dillies -/ import data.finset.n_ary import data.finset.preimage import data.set.pointwise /-! # Pointwise operations of finsets This file defines pointwise a...
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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: Jeremy Avigad, Leonardo de Moura -/ prelude import init.algebra.group /- Make sure instances defined in this file have lower priority than the ones defined for concrete stru...
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/- Copyright (c) 2017 Kevin Buzzard. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Kevin Buzzard, Mario Carneiro The complex numbers, modelled as R^2 in the obvious way. -/ import data.real.basic tactic.ring algebra.field_power structure complex : Type := (re : ℝ) (...
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/- induction a with k Pk, exfalso, apply ha, refl, cases k, repeat { rw ← one_eq_succ_zero }, repeat { rw one_mul }, intro h, exact h, intro h, have h2 := Pk (succ_ne_zero k), rw succ_mul at h, Don't think this works, fun attempt tho -/ induction c with k Pk generalizing b, rw mul_zero, rw mul_eq_zero_iff, intro h,...
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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 -/ import measure_theory.integration /-! # The Giry monad Let X be a measurable space. The collection of all measures on X again forms a measurable space. This constru...
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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: Mario Carneiro Multisets. -/ import logic.function order.boolean_algebra data.list.basic data.list.perm data.list.sort data.quot data.string algebra.order_functions algebra....
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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 -/ import control.traversable.equiv import control.traversable.instances import data.dlist /-! # Traversable instance for dlists This file provides the equivalence between `...
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import Lean def f : Nat → Bool | 0 => true | n + 1 => (match n with | 0 => true | _ + 1 => true) && f n def g (i j : Nat) : Nat := if i < 5 then 0 else match j with | Nat.zero => 1 | Nat.succ j => g i j def h (i j : Nat) : Nat := i + match j with | Nat.zero => 1 | Nat.succ j => h i ...
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example (m n : ℕ) : m + n = n + m := by simp theorem t1(p q: Prop):p → q → p:= assume hp:p, assume hq:q, show p, from hp --theorem t2(p q r: Prop)(H1:q → r)(H1:q → r):= theorem and_swap(p q : Prop):p ∧ q ↔ q ∧ p:= begin apply iff.intro, intro H1, exact and.intro(and.right H1)(and.left H1), intro H2, exact and...
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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 -/ import Std.Data.HashMap namespace Lean.SCC /- Very simple implementation of Tarjan's SCC algorithm. Performance is not a goal here since we use this mod...
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/- Copyright (c) 2021 Yury Kudryashov. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Yury Kudryashov, Reid Barton -/ import topology.separation /-! # The shrinking lemma > THIS FILE IS SYNCHRONIZED WITH MATHLIB4. > Any changes to this file require a corresponding PR...
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/- Copyright (c) 2018 Mario Carneiro. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Author: Mario Carneiro Godel numbering for partial recursive functions. -/ import computability.partrec open encodable denumerable namespace nat.partrec open nat (mkpair) theorem rfind' {f}...
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/- Copyright (c) 2019 Johan Commelin. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Johan Commelin, Kenny Lau -/ import data.mv_polynomial import linear_algebra.std_basis import ring_theory.ideal.local_ring import ring_theory.ideal.operations import ring_theory.multip...
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/- Copyright (c) 2020 Joseph Myers. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Joseph Myers -/ import algebra.add_torsor import data.set.intervals.unordered_interval import linear_algebra.affine_space.basic import linear_algebra.bilinear_map import linear_algebra.p...
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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, Mario Carneiro, Jeremy Avigad -/ import order.filter.ultrafilter import order.filter.partial import algebra.support /-! # Basic theory of topological spaces. The main...
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import ..library_dev.data.list.set ..library_dev.data.list.perm .quot .misc open list subtype nat definition nodup_list (A : Type) := {l : list A // nodup l} variable {A : Type} definition to_nodup_list_of_nodup {l : list A} (n : nodup l) : nodup_list A := ⟨l,n⟩ definition to_nodup_list [decidable_eq A] (l : list A...
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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 -/ import Lean.Expr import Lean.Environment import Lean.Attributes import Lean.ProjFns import Lean.Meta.Basic namespace Lean inductive ExternEntry where | ...
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-- section hypothesis P : Prop. definition crash := assume H : P, have H' : ¬ P, from H, _. end
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-- Import this file to pull in everything about "big operators". -- When preparing a contribution to mathlib, it is best to minimize the imports you use. import algebra.big_operators.order import algebra.big_operators.intervals import algebra.big_operators.ring import algebra.big_operators.pi import algebra.big_operato...
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/- - -/ print "ok"
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/- Copyright (c) 2020 Johan Commelin. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Johan Commelin -/ import data.nat.parity import data.polynomial.ring_division import group_theory.specific_groups.cyclic import ring_theory.integral_domain import number_theory.diviso...
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/- Copyright (c) 2019 Neil Strickland. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Neil Strickland -/ import algebra.group_with_zero.power import algebra.big_operators.order import algebra.big_operators.ring import algebra.big_operators.intervals /-! # Partial sum...
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import standard example (p q r : Prop) : p ∧ q ↔ q ∧ p := begin apply iff.intro, { intro H, match H with | and.intro H₁ H₂ := by apply and.intro; repeat assumption end }, { intro H, match H with | and.intro H₁ H₂ := by apply and.intro; repeat assumption end }, end
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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, Leonardo de Moura, Sebastian Ullrich -/ prelude import init.control.estate init.data.string.basic /-- Like https://hackage.haskell.org/package/ghc-Pr...
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/- Copyright (c) 2019 Seul Baek. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Seul Baek -/ /- Linear integer arithmetic terms in pre-normalized form. -/ import tactic.omega.term namespace omega namespace int /-- The shadow syntax for arithmetic terms. All constan...
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/- Copyright (c) 2020 Robert Y. Lewis. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Robert Y. Lewis -/ import tactic.linarith.datatypes import tactic.zify import tactic.cancel_denoms /-! # Linarith preprocessing This file contains methods used to preprocess inputs...
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/- Copyright (c) 2020 Yury Kudryashov. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Author: Yury Kudryashov, Johannes Hölzl, Mario Carneiro, Patrick Massot -/ import order.filter.basic import data.set.countable /-! # Filter bases A filter basis `B : filter_basis α` on a typ...
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/- Copyright (c) 2020 Ashvni Narayanan. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors : Ashvni Narayanan -/ import deprecated.subring import group_theory.subgroup import ring_theory.subsemiring /-! # Subrings Let `R` be a ring. This file defines the "bundled" subrin...
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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, Mario Carneiro Continuous functions. Parts of the formalization is based on the books: N. Bourbaki: General Topology I. M. James: Topologies and Uniformities A ma...
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/- Copyright (c) 2021 Microsoft Corporation. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Sebastian Ullrich, Daniel Selsam, Wojciech Nawrocki, E.W.Ayers -/ import Lean.Meta.Basic import Lean.Data.Json import Std.Data.RBMap namespace Lean /-- A position of a subexpr...
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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 -/ import Lean.Elab.Term import Lean.Elab.BindersUtil import Lean.Elab.PatternVar import Lean.Elab.Quotation.Util import Lean.Parser.Do -- HACK: avoid code ex...
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-- open inhabited nonempty classical lemma v1 : Prop := epsilon (λ x : Prop, true) inductive Empty : Type noncomputable definition v2 : Empty := epsilon (λ x, true)
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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, Yury G. Kudryashov, Scott Morrison -/ import algebra.big_operators.finsupp import linear_algebra.finsupp import algebra.non_unital_alg_hom /-! # Monoid algebras When ...
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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 data.int.cast.defs import algebra.hom.equiv.basic import algebra.group_with_zero.inj_surj /-! # `ulift` instances for groups and monoids > THIS FILE IS SYNCH...
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import tactic.rewrite_search abbreviation C := ℕ variables X_1 X_2 X_3 X_4 X_5 X_6 X_7 X_8 X_9 X_10 X_11 X_12 X_13 X_14 X_15 X_16 X_17 X_18 X_19 X_20 X_21 X_22 X_23 X_24 X_25 X_26 X_27 X_28 X_29 X_30 X_31 X_32 X_33 X_34 X_35 X_36 X_37 X_38 X_39 X_40 X_41 X_42 X_43 X_44 X_45 X_46 X_47 X_48 : C constant Rubik : C → C → ...