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/- Question 6 on John Britnell's handout for M1F group project on 18/10/18. Formalised by Kevin Buzzard, with many thanks to Gabriel Ebner for showing him how to do it. -/ inductive fml | atom (i : ℕ) | imp (a b : fml) | not (a : fml) open fml infixr ` →' `:50 := imp -- right associative prefix `¬' `:4...
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-- Human Usable /- [HumanUsable] is parameterized by an instance of type [SystemType], and it's a sub-attribute to [MissionEffective]. An instance of type [SystemType] is deemed [HumanUsable] if and only if all the requirements are satisfied. -/ import SystemModel.System inductive HumanUsable (sys_type: Syst...
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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, Eric Wieser -/ import data.matrix.basic import data.fin.vec_notation import tactic.fin_cases import algebra.big_operators.fin /-! # Matrix and vector notation This file inc...
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import standard print "\n Pi type in Lean \n" namespace hide1 constant A : Type constant B : A → Type check Π (x : A), B x -- backslash P check Π x : A, B x -- same as above check Pi x : A, B x -- same as above constant C : A → A → Type check Π x : A, Π y : A, C x y check Π (x : A) (y : A), C x y -- same as above...
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inductive list (A : Type) : Type := | nil {} : list A | cons : A → list A → list A namespace list open lift theorem nil_ne_cons {A : Type} (a : A) (v : list A) : nil ≠ cons a v := λ H, down (list.no_confusion H) theorem cons.inj₁ {A : Type} (a₁ a₂ : A) (v₁ v₂ : list A) : cons a₁ v₁ = cons a₂ v₂ → a₁ = a₂ :...
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universes u inductive node (α : Type u) | leaf : node | red_node : node → α → node → node | black_node : node → α → node → node namespace node variable {α : Type u} def balance : node α → α → node α → node α | (red_node (red_node a x b) y c) k d := red_node (black_node a x b) y (black_node c k d) | (red_node a x (re...
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/- Copyright (c) 2022 Kalle Kytölä. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Kalle Kytölä -/ import measure_theory.integral.interval_integral import analysis.special_functions.integrals /-! # The layer cake formula / Cavalieri's principle / tail probability form...
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/- Copyright (c) 2018 Kevin Buzzard, Patrick Massot. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Kevin Buzzard, Patrick Massot This file is to a certain extent based on `quotient_module.lean` by Johannes Hölzl. -/ import group_theory.coset /-! # Quotients of group...
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open nat -- deeper congruence universe l constants (T : Type.{l}) (x1 x2 x3 x4 x5 x6 : T) (f : T → T → T) constants (f_comm : ∀ x y, f x y = f y x) (f_l : ∀ x y z, f (f x y) z = f x (f y z)) (f_r : ∀ x y z, f x (f y z) = f y (f x z)) namespace tst attribute f_comm [simp] attribute f_l [simp] attrib...
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import .love08_operational_semantics_demo /-! # LoVe Demo 9: Hoare Logic We review a second way to specify the semantics of a programming language: Hoare logic. If operational semantics corresponds to an idealized interpreter, __Hoare logic__ (also called __axiomatic semantics__) corresponds to a verifier. Hoare log...
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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, Sébastien Gouëzel, Jean Lo -/ import algebra.algebra.tower import analysis.normed_space.linear_isometry import analysis.normed_space.riesz_lemma /-! # Operator n...
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-- import the definition of the example maze import example_maze.definition /-! # Example maze. You are in a maze of twisty passages, all alike! You can go north, south east or west. -/ namespace maze /- Solver remark : there are 5 rooms. Rooms are called 0,1,2,3,4 . 4 is the exit. -/ /-- Use n,s,e,w to move...
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/- Copyright (c) 2020 Heather Macbeth. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Heather Macbeth -/ import analysis.specific_limits import analysis.asymptotics /-! # The group of units of a complete normed ring This file contains the basic theory for the group o...
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import .byte open byte namespace unix namespace with_coinduction inductive step_result (state : Type) : Type | ask : (byte -> state) -> step_result | print : byte × state -> step_result | step : state -> step_result structure process : Type 1 := (state : Type) (initial_state : state) (transition...
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import logic open tactic section set_option pp.universes true set_option pp.implicit true variable {A : Type} variables {a b : A} variable H : a = b variables H1 H2 : b = a check H1 check H check H2 end
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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, Abhimanyu Pallavi Sudhir, Jean Lo, Calle Sönne, Yury Kudryashov -/ import data.real.sqrt import tactic.interval_cases import ring_theory.algebraic import data.rat.sqrt ...
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inductive Syntax | atom : String → Syntax | node : String → Array Syntax → Syntax instance coe1 : HasCoe String Syntax := ⟨Syntax.atom⟩ instance coe2 {α} : HasCoe (List α) (Array α) := ⟨List.toArray⟩ def ex10 (s : Syntax) : Syntax := Syntax.node "foo" (List.toArray ["boo", s]) -- Works def ex11 (s : Syntax) := [s, "...
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import data.list.cycle run_cmd guard ("c[1, 4, 3, 2]" = repr (↑[1, 4, 3, 2] : cycle ℕ)) run_cmd guard ("c[2, 1, 4, 3]" = repr (↑[2, 1, 4, 3] : cycle ℕ)) run_cmd guard ("c[2, 1, 4, -1]" = repr (↑[(2 : ℤ), 1, 4, -1] : cycle ℤ))
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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: Gabriel Ebner, Sebastian Ullrich, Mac Malone -/ import Lake.Util.Proc import Lake.Util.Lift open System namespace Lake namespace Git @[noinline] def defaultRemote := "origi...
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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, Mario Carneiro In the standard library we cannot assume the univalence axiom. We say two types are equivalent if they are isomorphic. Two equivalent types h...
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import data.set open set /- Intuitively a set is a collection of objects. That said, if one is not careful about what one allows a set to be, paradoxes can arise, making the logical system inconsistent, and thus useless. For more details, search for an explanation of Russell's paradox. The work needed to repair Rus...
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import .monoidal_functor_attributes open category_theory open tactic universes v u v₁ u₁ v₂ u₂ open category_theory.category open category_theory.functor open category_theory.prod open category_theory.nat_iso namespace category_theory class braided_monoidal_category (C : Sort u) extends monoidal_category.{v} C := -...
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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, Heather Macbeth -/ import topology.continuous_function.weierstrass import analysis.complex.basic /-! # The Stone-Weierstrass theorem If a subalgebra `A` of `C(X, ℝ)`,...
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/- Copyright (c) 2021 Kexing Ying. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Kexing Ying -/ import measure_theory.decomposition.signed_hahn /-! # Jordan decomposition This file proves the existence and uniqueness of the Jordan decomposition for signed measures. ...
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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 The combined Except and State Monad that minimizes the number of memory allocations using the approach described in the paper "Counting immutable beans" by Se...
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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, Johan Commelin, Bhavik Mehta -/ import category_theory.natural_isomorphism /-! # Comma categories A comma category is a construction in category theory, which builds ...
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/- Copyright (c) 2016 Microsoft Corporation. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Author: Leonardo de Moura -/ prelude import Init.SimpLemmas import Init.Data.Nat.Basic open Decidable List universe u v w variable {α : Type u} {β : Type v} {γ : Type w} namespace Lis...
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open nat set_option blast.subst false constant f (a b : nat) : a > b → nat constant g : nat → nat definition tst (a₁ a₂ b₁ b₂ c d : nat) (H₁ : a₁ > b₁) (H₂ : a₂ > b₂) : a₁ = c → a₂ = c → b₁ = d → d = b₂ → g (g (f a₁ b₁ H₁)) = g (g (f a₂ b₂ H₂)) := by blast print tst
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/- Justin Cai, jc5pz Here is the practice exam. It provides you with a set of problems illustrative of the material to be tested. This is a homework assignment due this coming Thursday. We will review the questions in class. Copy this file your "work" directory. Work on it there. Upload to Collab when done. Note: An ...
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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.FindMVar import Lean.Meta.ExprDefEq import Lean.Meta.SynthInstance import Lean.Meta.CollectMVars import Lean.Meta.Tactic.Util namespace Le...
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/- Copyright (c) 2020 Joseph Myers. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Author: Joseph Myers. -/ import analysis.normed_space.real_inner_product import analysis.normed_space.add_torsor import tactic.interval_cases noncomputable theory open_locale classical open_loca...
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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.adjunction.whiskering import category_theory.sites.sheafification import category_theory.sites.whiskering /-! In this file, we show that an adjunctio...
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namespace nat check induction_on -- ERROR check rec_on -- ERROR check nat.induction_on check less_than.rec_on -- OK check nat.less_than.rec_on namespace le check rec_on -- ERROR check less_than.rec_on end le end nat
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import algebra.big_operators data.set.finite definition matrix (R: Type) (n m : nat)[ring R] := fin n →( fin m → R ) namespace matrix definition add ( R : Type) [ring R] {n m: nat }(A:matrix R m n) ( B : matrix R m n): (matrix R m n):= λ I J, A I J + B I J --begin --unfold matrix, --intros I J, --exact A I J +...
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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 data.fintype.basic import category_theory.limits.limits import category_theory.sparse /-! # Wide pullbacks We define the category `wide_pullback_shape`, (resp. `...
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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. Authors: Leonardo de Moura, Jeremy Avigad Set-like operations on lists. -/ import ...data.list.basic data.list.comb .basic .comb data.list.set open nat function decidable universe variabl...
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/- Copyright (c) 2017 Microsoft Corporation. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Author: Gabriel Ebner -/ import data.buffer.parser -- I'd like to contribute a new naming convention: -- CamelCase for non-terminals. def join (sep : string) : list string → string | [...
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import Init.Lean open Lean #eval toString $ Unhygienic.run $ do a ← `(Nat.one); let rhs_0 : _ := fun (a : Lean.Syntax) (b : Lean.Syntax) => pure Syntax.missing; let rhs_1 : _ := fun (_a : _) => pure Lean.Syntax.missing; let discr_2 : _ := a; ite (Lean.Syntax.isOfKind discr_2 (Lean.mkNameStr (Lean...
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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 linear_algebra.dimension import ring_theory.principal_ideal_domain import ring_theory.finiteness /-! # Free modules over PID A free `R`-module `M` is a module wit...
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/- Copyright (c) 2019 Sébastien Gouëzel. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Sébastien Gouëzel, Yury Kudryashov -/ import analysis.calculus.local_extr import analysis.convex.topology import data.complex.is_R_or_C /-! # The mean value inequality and equaliti...
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import ..list ..int open list inductive preterm_lia : Type | var : nat → preterm_lia | cst : int → preterm_lia | lmul : int → nat → preterm_lia | rmul : nat → int → preterm_lia | neg : preterm_lia → preterm_lia | add : preterm_lia → preterm_lia → preterm_lia | sub : preterm_lia → preterm_lia → preterm_lia open ...
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inductive json | jarray : list json → json | jobject : list (string × json) → json | jint : int → json --| number_float : int → json -- not handling float yet | jstring : string → json | jbool : bool → json | jnull : json namespace json /- Using json as a dictionary -/ private meta def get_value_by_key (key : strin...
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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: Stephen Morgan, Scott Morrison import category_theory.functor_category namespace category_theory universes u₁ v₁ u₂ v₂ u₃ v₃ u₄ v₄ section variables (C : Type u₁) [𝒞 : categ...
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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 -/ import measure_theory.outer_measure /-! # Measure spaces Measures are restricted to a measurable space (associated by the type class `measurable_spa...
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def ex1 (x y : Nat) (i j : Int) := binrel% LT.lt x i def ex2 (x y : Nat) (i j : Int) := binrel% LT.lt i x def ex3 (x y : Nat) (i j : Int) := binrel% LT.lt (i + 1) x def ex4 (x y : Nat) (i j : Int) := binrel% LT.lt i (x + 1) def ex5 (x y : Nat) (i j : Int) := binrel% LT.lt i (x + y) def ex6 (x y : Nat) (i...
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/- Copyright (c) 2021 Yaël Dillies. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Yaël Dillies -/ import data.set.image /-! # Monovariance of functions > THIS FILE IS SYNCHRONIZED WITH MATHLIB4. > Any changes to this file require a corresponding PR to mathlib4. Two...
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/- Copyright (c) 2022 Michael Stoll. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Michael Stoll -/ import data.zmod.basic import ring_theory.int.basic /-! # Coprimality and vanishing We show that for prime `p`, the image of an integer `a` in `zmod p` vanishes if an...
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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.Runtime import Lean.Compiler.NameMangling import Lean.Compiler.ExportAttr import Lean.Compiler.InitAttr import Lean.Compiler.IR.CompilerM import...
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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 tactic.ring_exp import topology.metric_space.hausdorff_distance /-! # Topological study of spaces `Π (n : ℕ), E n` When `E n` are topological spaces, t...
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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.meta.declaration init.meta.exceptional init.data.option.basic import init.meta.rb_map /-- An __environment__ contains all of the declar...
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/- Copyright (c) 2020 The Xena project. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Kevin Buzzard. Thanks: Imperial College London, leanprover-community -/ -- We will assume that the real numbers are a field. import data.real.basic /-! # The complex numbers We de...
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import data.multiset data.finset .to_multiset algebra.big_operators open classical multiset finset local attribute [instance] prop_decidable universe u variable α : Type u lemma eq_zero_iff_to_finset_eq_empty {g : multiset α} : g = 0 ↔ g.to_finset = ∅ := begin apply iff.intro, { intro h1, rw finset.ext,...
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/- Copyright (c) 2015 Jeremy Avigad. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Author: Jeremy Avigad The power operation on monoids and groups. We separate this from group, because it depends on nat, which in turn depends on other parts of algebra. We have "pow a n" for ...
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section question9 variables A B C : Prop example (h : C → A ∨ B) : (C ∧ ¬A) → B := begin intro h₁, -- N.B. What happens if you try `split` instead of `intro`? cases h₁ with h₂ h₃, have h₄ : A ∨ B, from h h₂, -- What happens if you write `h h₂` instead? cases h₄ with h₅ h₅, -- Or elimination. { exfalso, ...
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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.Meta.Tactic.Assert import Lean.Meta.Match.CaseValues namespace Lean.Meta structure CaseArraySizesSubgoal := (mvarId : MVarId) (elems : Ar...
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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.Expr namespace Lean namespace Expr namespace ReplaceImpl @[inline] def cacheSize : USize := 8192 - 1 structure Cache where -- First cacheS...
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/- Copyright (c) 2020 Markus Himmel. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Markus Himmel, Scott Morrison -/ import category_theory.preadditive.projective import algebra.category.Module.abelian import linear_algebra.finsupp_vector_space import algebra.module.pr...
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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 measure_theory.constructions.borel_space /-! # Measurability criterion for ennreal-valued functions Consider a function `f : α → ℝ≥0∞`. If the level se...
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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 Mathlib.PrePort import Mathlib.Lean3Lib.init.default import Mathlib.Lean3Lib.data.dlist import Mathlib.tactic.core import Mathlib.tactic.clear import Mathlib.P...
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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, Sébastien Gouëzel, Jean Lo Operator norm on the space of continuous linear maps Define the operator norm on the space of continuous linear maps between normed s...
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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, Markus Himmel -/ import category_theory.limits.shapes.zero import category_theory.limits.shapes.equalizers /-! # Kernels and cokernels In a category with zero morphis...
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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.Meta.Tactic.Intro import Lean.Meta.Tactic.Assumption import Lean.Meta.Tactic.Apply import Lean.Meta.Tactic.Revert import Lean.Meta.Tactic.Clear ...
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/- Copyright (c) 2014 Microsoft Corporation. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Author: Leonardo de Moura -/ import logic.eq open eq.ops decidable namespace option definition is_none {A : Type} : option A → Prop | none := true | (some v) := false the...
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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.sheafification import category_theory.sites.limits import category_theory.limits.functor_category import category_theory.limits.filtered_colimit_...
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open nat check succ 1 notation 1 := unit check succ 1
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import InsideOut.Syntax import InsideOut.Error abbrev Ctx := List (String × Typ) abbrev App := List Typ abbrev M := Except Error mutual partial def checkOutsideIn (Γ : Ctx) : Exp → Typ → M Typ | Exp.let x₁ t₂ e₃ e₄, t => do let t₃ ← checkOutsideIn Γ e₃ t₂ checkOutsideIn ((x₁, t₃) :: Γ) e₄ t | e@(Exp.ab...
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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. Author: Floris van Doorn, Jakob von Raumer -/ import .precategory types.sigma arity open eq category prod equiv is_equiv sigma sigma.ops is_trunc namespace iso structure split_mono [clas...
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-- Copyright (c) 2014 Jakob von Raumer. All rights reserved. -- Released under Apache 2.0 license as described in the file LICENSE. -- Author: Jakob von Raumer -- Ported from Coq HoTT open eq function funext namespace is_equiv context --Precomposition of arbitrary functions with f definition precomp {A B : Typ...
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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 Limits in a category -/ import .constructions.cone .constructions.discrete .constructions.product .constructions.finite_cats .category open is_trunc functo...
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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.limits.limits import category_theory.punit import category_theory.comma import category_theory.is_connected /-! # Cofinal functors A functor ...
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import data.list.basic .nat variables {α : Type} {k m n : nat} {as bs cs : list α} namespace list @[simp] def get [has_zero α] : nat → list α → α | _ [] := (0 : α) | 0 (i::is) := i | (n+1) (i::is) := get n is @[simp] lemma get_nil [has_zero α] {k} : get k [] = (0 : α) := begin cases k; refl end lem...
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set_option pp.coercions false check if tt then "a" else "b" /- Remark: in the standard library nat_to_int and int_to_real are has_lift instances instead of has_coe. -/ constant int : Type constant real : Type constant nat_to_int : has_coe nat int constant int_to_real : has_coe int real attribute [instance] nat_t...
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import ring_theory.finiteness import linear_algebra.free_module import linear_algebra.dual open_locale big_operators variables (R M : Type*) [ring R] [add_comm_group M] [module R M] lemma module.finite.of_basis {ι : Type*} [fintype ι] (b : basis ι R M) : module.finite R M := begin classical, refine ⟨⟨finset.univ...
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/- Copyright (c) 2018 Patrick Massot. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Patrick Massot, Kevin Buzzard, Scott Morrison, Johan Commelin, Chris Hughes, Johannes Hölzl, Yury Kudryashov -/ import algebra.group.to_additive algebra.group.basic /-! # monoid an...
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theorem le_succ (a b : mynat) : a ≤ b → a ≤ (succ b) := begin intro h, cases h with c hc, use (succ c), rw hc, ring, end
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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 Integer power operation on fields. -/ import algebra.group_with_zero_power import tactic.linarith universe u @[simp] lemma ring_hom.map_fpow {K L : Type*} [division...
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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. Author: Floris van Doorn, Jakob von Raumer Cubes -/ import .square open equiv is_equiv sigma sigma.ops namespace eq inductive cube {A : Type} {a₀₀₀ : A} : Π{a₂₀₀ a₀₂₀ a₂₂₀ a₀₀₂ a₂₀₂ a₀...
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namespace IMOGrandChallenge def Set (X : Type) : Type := X → Prop def Set.mem {X : Type} (x : X) (s : Set X) : Prop := s x end IMOGrandChallenge
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/- Copyright (c) 2020 Adam Topaz. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Zhangir Azerbayev, Adam Topaz, Eric Wieser. -/ import algebra.ring_quot import linear_algebra.tensor_algebra import linear_algebra.alternating import group_theory.perm.sign /-! # Exterio...
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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 -/ import data.int.dvd.basic import data.nat.pow /-! # Basic lemmas about the divisibility relation in `ℤ` involving powers. -/ open nat namespace int @[simp] theorem ...
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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.JsonRpc /-! Defines most of the 'Basic Structures' in the LSP specification (https://microsoft.github.io/lan...
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/- Copyright (c) 2020 Johan Commelin and Robert Y. Lewis. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Johan Commelin and Robert Y. Lewis -/ import data.mv_polynomial.rename /-! # Monad operations on `mv_polynomial` This file defines two monadic operations on `mv...
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import number_theory.padics.padic_norm import topology.basic import data.rat.basic import data.real.cau_seq import analysis.special_functions.exp_log import analysis.special_functions.pow import topology.metric_space.basic import topology.homeomorph import topology.algebra.group_with_zero import data.nat.prime import d...
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import data.real.basic import data.int.parity /- In this file, we learn how to handle the ∃ quantifier. In order to prove `∃ x, P x`, we give some x₀ using tactic `use x₀` and then prove `P x₀`. This x₀ can be an object from the local context or a more complicated expression. -/ example : ∃ n : ℕ, 8 = 2*n := begin ...
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import category_theory.natural_isomorphism import category_theory.products import category_theory.types import category_theory.fully_faithful import category_theory.yoneda import category_theory.limits.cones import category_theory.equivalence import tactic.tidy import tactic.rewrite_search import tidy.forwards_reasoni...
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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.meta.declaration init.meta.exceptional meta constant environment : Type namespace environment /- Create a standard environment using t...
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/- Copyright (c) 2019 Johannes Hölzl. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Author: Johannes Hölzl Linear structures on function with finite support `α →₀ M`. -/ import data.monoid_algebra noncomputable theory open set linear_map submodule open_locale classical na...
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/- Copyright (c) 2019 Floris van Doorn. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Floris van Doorn -/ import data.real.basic import data.set.intervals import data.set.pairwise import set_theory.cardinal /-! Proof that a cube (in dimension n ≥ 3) cannot be cubed: T...
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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 -/ import data.nat.enat import data.set.intervals.ord_connected /-! # Theory of conditionally complete lattices. A conditionally complete lattice is a lattice in...
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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 Traversable instance for dlists. -/ import data.dlist import control.traversable.equiv import control.traversable.instances namespace dlist variables (α : Type*) open func...
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/- Copyright (c) 2014 Robert Lewis. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Robert Lewis, Leonardo de Moura Structures with multiplicative and additive components, including division rings and fields. The development is modeled after Isabelle's library. -/ prel...
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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 Declaration of the interval -/ import .susp types.eq types.prod cubical.square open eq susp unit equiv is_trunc nat prod definition interval : Type₀ := susp unit ...
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/- Copyright (c) 2021 Johan Commelin. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Johan Commelin -/ import topology.subset_properties import topology.connected import topology.algebra.monoid import topology.continuous_function.basic import tactic.tfae import tactic....
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import data.real.basic import algebra.group.pi set_option pp.beta true /- In this file, we'll learn about the ∀ quantifier, and the disjunction operator ∨ (logical OR). Let P be a predicate on a type X. This means for every mathematical object x with type X, we get a mathematical statement P x. In Lean, P x has ty...
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/- Copyright (c) 2019 Lucas Allen. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Lucas Allen and Scott Morrison -/ import data.mllist import tactic.solve_by_elim /-! # `suggest` and `library_search` `suggest` and `library_search` are a pair of tactics for applying l...
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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 -/ import linear_algebra.matrix.reindex import linear_algebra.matrix.to_lin /-! # Bases and matrices This file defines the ma...
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/- Copyright (c) 2021 Johan Commelin. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Johan Commelin -/ import analysis.normed_space.basic import topology.sequences import topology.metric_space.isometry /-! # Normed groups homomorphisms This file gathers definitions ...
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import analysis.analytic.composition import analysis.normed_space.inner_product import topology.metric_space.pi_Lp import analysis.calculus.iterated_deriv import analysis.calculus.mean_value import analysis.calculus.implicit import measure_theory.bochner_integration import measure_theory.lebesgue_measure import linear_...
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/- Copyright (c) 2014 Robert Lewis. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Robert Lewis, Leonardo de Moura, Johannes Hölzl, Mario Carneiro -/ import algebra.ring.basic import algebra.group_with_zero open set set_option old_structure_cmd true universe u variab...
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import game.world4.level7 -- hide -- incantation for importing ring into framework -- hide import tactic.ring -- hide meta def nat_num_game.interactive.ring := tactic.interactive.ring -- hide namespace mynat -- hide def two_eq_succ_one : (2 : mynat) = succ 1 := rfl -- hide /- # Power World -/ instance : comm_semiri...