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def g (x : Nat) : List (Nat × List Nat) := [(x, [x, x]), (x, [])] def h (x : Nat) : List (Nat × List Nat) := g x $.filter fun ⟨_, xs⟩ => xs.isEmpty theorem ex1 : g 10 = [(10, [10, 10]), (10, [])] := rfl theorem ex2 : h 10 = [(10, [])] := rfl
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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.multiset.erase_dup /-! # The fold operation for a commutative associative operation over a multiset. -/ namespace multiset variables {α β : Type*} /-! ...
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/- Copyright (c) 2018 Jan-David Salchow. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Jan-David Salchow, Patrick Massot -/ import topology.subset_properties import topology.metric_space.basic /-! # Sequences in topological spaces In this file we define sequences in...
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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, Yury Kudryashov -/ import algebra.algebra.operations /-! # Subalgebras over Commutative Semiring In this file we define `subalgebra`s and the usual operations on them (`map`, `...
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/- Copyright (c) 2019 Kenny Lau. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Kenny Lau -/ import algebra.algebra.bilinear import algebra.algebra.equiv import algebra.module.submodule.pointwise import algebra.module.submodule.bilinear import algebra.module.opposites ...
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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.Transform import Lean.Meta.Tactic.Replace import Lean.Meta.Tactic.Util import Lean.Meta.Tactic.Clear import Lean.Meta.Tactic.Simp.Types imp...
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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 -/ import category_theory.balanced import category_theory.lifting_properties.basic /-! # Strong epimorphisms > THIS FILE IS SYNCHRONIZED WITH MATHLIB4. > Any changes to ...
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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 topology.urysohns_bounded import topology.algebra.ordered.monotone_continuity import data.set.intervals.disjoint import data.set.intervals.monotone /-...
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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 algebra.char_p import algebra.ring.pi import analysis.special_functions.pow import field_theory.perfect_closure import ring_theory.localization import ring_theory.subri...
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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: Johan Commelin, Scott Morrison, Adam Topaz -/ import algebraic_topology.simplex_category import category_theory.category.ulift import category_theory.limits.functor_category import cat...
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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, Reid Barton, Bhavik Mehta -/ import Mathlib.PrePort import Mathlib.Lean3Lib.init.default import Mathlib.category_theory.over import Mathlib.category_theory.limits.prese...
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-- Game axiomatics import game.world_09_advanced_multiplication import mynat.le namespace mynat lemma one_add_le_self (x : mynat) : x ≤ 1 + x := begin[nat_num_game] use 1, apply add_comm, end lemma le_refl (x : mynat) : x ≤ x := begin[nat_num_game] use 0, refl, end attribute [refl] mynat.le_refl theorem le...
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/- Copyright (c) 2020 Mario Carneiro. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Mario Carneiro, Floris van Doorn, Yury Kudryashov -/ import topology.instances.nnreal import topology.algebra.ordered.monotone_continuity /-! # Square root of a real number In this f...
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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: Mario Carneiro, Daniel Selsam -/ import Mathport.Syntax.Translate.Basic namespace Mathport.Translate open Lean hiding Expr Expr.app Expr.const Expr.sort Level Level.imax Level...
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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 Mathlib.PrePort import Mathlib.Lean3Lib.init.default import Mathlib.category_theory.category.default import Mathlib.PostPort universes u_1 namespace Mathlib /-...
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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 Constructions with groups -/ import hit.set_quotient .subgroup ..move_to_lib open eq algebra is_trunc set_quotient relation sigma sigma.ops prod tru...
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/- Copyright (c) 2020 Wojciech Nawrocki. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Wojciech Nawrocki, Marc Huisinga -/ import Lean.Data.Position import Lean.Data.Lsp import Lean.Server.InfoUtils import Init.System.FilePath namespace IO def throwServerError (err...
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namespace hide inductive nat : Type := | zero : nat | succ : nat → nat namespace nat definition add (m n : nat) : nat := nat.rec_on n m (fun n add_m_n, succ add_m_n) notation 0 := zero infix `+` := add theorem add_zero (m : nat) : m + 0 = m := rfl theorem add_succ (m n : nat) : m + succ n = succ (m + n) := rfl l...
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example : preorder unit := { le := λ _ _, true, le_refl := λ _, trivial, le_trans := λ _ _ _ _ _, trivial, } example : partial_order unit := { le := λ _ _, true, le_refl := λ _, trivial, le_trans := λ _ _ _ _ _, trivial, le_antisymm := by intros a b; intros; cases a; cases b; refl } exampl...
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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 -/ -- develop the concept of finite subgroups based on finsets so that the properties -- can be used directly without translating from the set based theory first import d...
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import algebra.groupoid algebra.group open eq sigma unit category path_algebra equiv set_option pp.implicit true set_option pp.universes true set_option pp.notation false context parameters {D₀ : Type} [C : precategory D₀] {D₂ : Π ⦃a b c d : D₀⦄ (f : hom a b) (g : hom c d) (h : hom a c) (i : hom b d), Typ...
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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.degree.basic /-! # Theory of univariate polynomials The main results are `induction_on` and `as_s...
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/- Copyright (c) 2015 Jakob von Raumer. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Floris van Doorn Properties of trunc_index, is_trunc, trunctype, trunc, and the pointed versions of these -/ -- NOTE: the fact that (is_trunc n A) is a mere proposition is proved i...
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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 and Kevin Buzzard -/ import order.order_iso import tactic.tidy import linear_algebra.subtype_module import linear_algebra.quotient_module import linea...
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/- Copyright (c) 2020 Microsoft Corporation. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Author: Leonardo de Moura -/ import Lean.Expr namespace Lean inductive HeadIndex where | fvar (fvarId : FVarId) | mvar (mvarId : MVarId) | const (constName : Name) | proj (stru...
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namespace test inductive {u₁ u₂} lift (A : Type u₁) : Type (max 1 u₁ u₂) | inj : A → lift set_option pp.universes true variables (A : Type 3) (B : Type 1) check A = lift.{1 3} B universe u variables (C : Type (u+2)) (D : Type u) check C = lift.{u u+2} D end test
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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.lean.compiler.ir.compilerm namespace Lean namespace IR namespace Checker structure Context := (env : Environment) (localCtx : LocalCo...
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/- Copyright (c) 2020 Yury G. Kudryashov. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Author: Yury G. Kudryashov -/ import Mathlib.PrePort import Mathlib.Lean3Lib.init.default import Mathlib.order.filter.basic import Mathlib.data.set.countable import Mathlib.PostPort univer...
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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, Yury Kudryashov -/ import algebra.group.semiconj /-! # Commuting pairs of elements in monoids We define the predicate `commute a b := a * b = b * a` and provide som...
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import analysis.topology.topological_space import analysis.topology.continuity import analysis.topology.topological_structures import ex3 open tactic expr function has_add variables {X : Type*} {Y : Type*} {Z : Type*} {W : Type*} {f f₁ f₂ : X → Y} {g : Y → Z} {h : Z → W} variables [topological_space X] [topo...
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/- Copyright (c) 2020 Frédéric Dupuis. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Frédéric Dupuis -/ import topology.continuous_function.algebra import linear_algebra.affine_space.affine_map /-! # Topological properties of affine spaces and maps For now, this con...
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import logic open tactic theorem tst (a b : Prop) (H : ¬ a ∨ ¬ b) (Hb : b) : ¬ a ∧ b := begin apply and.intro, exact (assume Ha, or.elim H (assume Hna, @absurd _ false Ha Hna) (assume Hnb, @absurd _ false Hb Hnb)), assumption end
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/- Copyright (c) 2022 Alexander Bentkamp. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Alexander Bentkamp -/ import analysis.inner_product_space.gram_schmidt_ortho import linear_algebra.matrix.pos_def /-! # LDL decomposition This file proves the LDL-decomposition o...
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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: Sebastian Ullrich -/ prelude import init.category.monad init.meta.interactive import init.category.state init.category.except init.category.reader init.category.option universes...
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/- Copyright (c) 2014 Floris van Doorn (c) 2016 Microsoft Corporation. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Floris van Doorn, Leonardo de Moura, Jeremy Avigad, Mario Carneiro -/ import algebra.ordered_ring import algebra.order_functions /-! # Basic operation...
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/- Copyright (c) 2021 Bhavik Mehta. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Bhavik Mehta -/ import category_theory.limits.shapes.terminal import category_theory.limits.shapes.binary_products import category_theory.epi_mono /-! # Strict initial objects This fi...
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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.level init.control.monad init.meta.rb_map universes u v open native /-- Column and line position in a Lean source file. -/ structur...
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/- Copyright (c) 2019 Yury Kudryashov. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Yury Kudryashov, Scott Morrison, Simon Hudon Definition and basic properties of endomorphisms and automorphisms of an object in a category. -/ import category_theory.category catego...
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/- Author: Bolton Bailey -/ import data.mv_polynomial.basic import data.polynomial.div import data.polynomial.field_division import algebra.polynomial.big_operators import ...general_lemmas.polynomial_mv_sv_cast import ...general_lemmas.mv_divisability import ...general_lemmas.single_antidiagonal import ...general_lemm...
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/- Copyright (c) 2021 Oliver Nash. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Oliver Nash -/ import analysis.normed_space.continuous_affine_map import analysis.calculus.cont_diff /-! # Smooth affine maps > THIS FILE IS SYNCHRONIZED WITH MATHLIB4. > Any changes to...
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import analysis.specific_limits import data.int.parity import topology.sequences attribute [instance] classical.prop_decidable /- Lemmas from that file were hidden in my course, or restating things which were proved without name in previous files. -/ notation `|`x`|` := abs x -- The mathlib version is unusable bec...
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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 algebra.algebra.tower import data.polynomial.algebra_map /-! # Algebra towers for polynomial This file proves some basic results about the algebra tower structure for...
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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, Joey van Langen, Casper Putz -/ import tactic.apply_fun import data.equiv.ring import data.zmod.algebra import linear_algebra.finite_dimensional import ring_theory.integral...
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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) 2014 Jeremy Avigad. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Jeremy Avigad, Leonardo de Moura Various multiplicative and additive structures. Partially modeled on Isabelle's library. -/ import logic.eq data.unit data.sigma data.prod import alge...
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import parlang.defs import parlang.lemmas_active_map import parlang.lemmas_thread_state import parlang.lemmas_state namespace parlang variables {n : ℕ} {σ : Type} {ι : Type} {τ : ι → Type} [decidable_eq ι] @[simp] lemma exec_skip {n} {ac : vector bool n} {s} : exec_state (kernel.compute id : kernel σ τ) ac s s := beg...
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example (n m : ℕ) : n + m = m + n := begin let s := n + m, induction n, case nat.zero : {sorry}, -- error: could not find open goal of given case case nat.succ : {sorry} end
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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.limits.shapes.split_coequalizer import category_theory.limits.preserves.basic /-! # Preserving (co)equalizers Constructions to relate the notions...
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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 leanpkg.manifest system.io leanpkg.proc leanpkg.git namespace leanpkg def assignment := list (string × string) namespace assignment def empty : assignm...
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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, Jakob von Raumer Functor precategory and category -/ import ..nat_trans ..category open eq functor is_trunc nat_trans iso is_equiv namespace category definit...
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/- Copyright (c) 2019 Abhimanyu Pallavi Sudhir. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Abhimanyu Pallavi Sudhir Construction of the hyperreal numbers as an ultraproduct of real sequences. -/ import order.filter.filter_product import analysis.specific_limits op...
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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, Devon Tuma -/ import probability.probability_mass_function.monad /-! # Specific Constructions of Probability Mass Functions This file gives a number of different `pmf...
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/- Copyright (c) 2022 Anne Baanen. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Anne Baanen -/ import data.zmod.quotient import linear_algebra.free_module.finite.rank import linear_algebra.free_module.pid import linear_algebra.free_module.strong_rank_condition impor...
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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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open bool nat attribute [reducible] nat.rec_on definition is_eq (a b : nat) : bool := nat.rec_on a (λ b, nat.cases_on b tt (λb₁, ff)) (λ a₁ r₁ b, nat.cases_on b ff (λb₁, r₁ b₁)) b example : is_eq 3 3 = tt := rfl example : is_eq 3 5 = ff := rfl theorem eq.to_is_eq (a b : nat) (H : a = b) : is_eq a b = tt := ha...
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import game.world6.level8 -- hide import tactic.tauto local attribute [instance, priority 10] classical.prop_decidable -- hide /- # Advanced proposition world. ## Level 10: `exfalso` and proof by contradiction. It's certainly true that $(P\land(\lnot P)\implies Q$ for any propositions $P$ and $Q$, because the left...
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/- Copyright (c) 2021 Mario Carneiro All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Mario Carneiro -/ import algebra.big_operators.norm_num import data.nat.squarefree import data.int.gcd import data.nat.fib import data.nat.prime import data.nat.sqrt_norm_num import ana...
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import data.int.parity import tactic.apply_fun import data.real.basic import algebra.group.pi import tactiques namespace tactic.interactive setup_tactic_parser open tactic meta def verifie : tactic unit := `[ { repeat { unfold limite_suite}, repeat { unfold continue_en }, push_neg, try { simp only [exists_...
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/- Copyright (c) 2017 Mario Carneiro. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Author: Mario Carneiro -/ import data.fintype.basic import algebra.big_operators /-! Results about "big operations" over a `fintype`, and consequent results about cardinalities of certain type...
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import pseudo_normed_group.LC import for_mathlib.normed_group_hom_completion /-! # V-hat(M_c^n) One of the key players in the proof of the main theorem of this repo is the normed group V-hat(M-bar_r'(S)_{≤c}^n). This file constructs ## Key defintions - `CLCP V n`: the functor that sends a profinite set `S` to `V-ha...
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open tactic example (p q : Prop) : p ∨ q → q ∨ p := by do H ← intro `H, induction_core semireducible H `or.rec [], constructor_idx 2, assumption, constructor_idx 1, assumption open nat example (n : ℕ) : n = 0 ∨ n = succ (pred n) := by do n ← get_local `n, induction_core semireducible n `nat.rec [], cons...
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/- Copyright (c) 2014 Parikshit Khanna. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Parikshit Khanna, Jeremy Avigad, Leonardo de Moura, Floris van Doorn, Mario Carneiro -/ import algebra.order_functions import control.monad.basic import data.nat.basic import order.r...
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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 import group_theory.congr...
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/- Copyright (c) 2020 Yury Kudryashov All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Yury Kudryashov -/ import ring_theory.prod import group_theory.submonoid import data.equiv.ring /-! # Bundled subsemirings We define bundled subsemirings and some standard construct...
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import specialfn. variable x : Real eval sinh(x) eval cosh(x) eval tanh(x) eval coth(x) eval sech(x) eval csch(x)
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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.ordered_group init.algebra.ring /- Make sure instances defined in this file have lower priority than the ones ...
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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: Johan Commelin, Scott Morrison, Adam Topaz -/ import topology.sheaves.sheaf_of_functions import topology.sheaves.stalks import topology.local_homeomorph import topology.sheaves.sheaf_c...
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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, Jens Wagemaker Theory of univariate polynomials, represented as `ℕ →₀ α`, where α is a commutative semiring. -/ import data.finsupp algebra.gcd_domain ring...
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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, Johan Commelin, Andrew Yang, Joël Riou -/ import category_theory.limits.preserves.shapes.zero import category_theory.monoidal.End import category_theory.monoidal.discre...
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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 topology.continuous_function.bounded import topology.uniform_space.compact import topology.compact_open import topology.sets.compacts /-! # Continuous functio...
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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: Scott Morrison import .transport .tidy namespace tactic meta def its { α : Type } (e : expr) (discharger : tactic α): tactic α := (`[refine (transport %%e _)] <|> `[refine (cas...
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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: Floris van Doorn, Leonardo de Moura -/ prelude import Init.SimpLemmas set_option linter.missingDocs true -- keep it documented universe u namespace Nat /-- `Nat.fold` evaluate...
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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.products import category_theory.equivalence open category_theory namespace category_theory.prod universes u₁ v₁ u₂ v₂ u₃...
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/- Dependent pattern matching -/ inductive Vector (α : Type u) : Nat → Type u | nil : Vector α 0 | cons : α → Vector α n → Vector α (n+1) infix:67 "::" => Vector.cons def Vector.zip : Vector α n → Vector β n → Vector (α × β) n | nil, nil => nil | a::as, b::bs => (a, b) :: zip as bs #print Vector.zip /- def ...
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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 -/ /-! The formatter turns a `Syntax` tree into a `Format` object, inserting both mandatory whitespace (to separate adjacent tokens) as well as "pretty" optional ...
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import topology.constructions /- In this file, we define notation `X^n` to take powers of types. By definition, `X^n` is modelled as functions from `fin n` to `X`. -/ /-- A definition of powers of a type. -/ def type_pow : has_pow (Type*) ℕ := ⟨λ A n, fin n → A⟩ namespace type_pow_topology local attribute [instanc...
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import tidy.rewrite_search.core import tidy.lib.utf8 import system.io open tidy.rewrite_search namespace tidy.rewrite_search.tracer.graph open tactic open io.process.stdio def SUCCESS_CHAR : string := "S" def ERROR_CHAR : string := "E" def SEARCH_PATHS : list string := [ "_target/deps/lean-tidy/res/graph_trace...
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def f (x : Nat) : Nat × (Nat → String) := let x1 := x + 1; let x2 := x + 2; let x3 := x + 3; let x4 := x + 4; let x5 := x + 5; let x6 := x + 6; let x7 := x + 7; let x8 := x + 8; let x9 := x + 9; let x10 := x + 10; let x11 := x + 11; let x12 := x + 12; let x13 := x + 13; let x14 := x + 14; let x15 := x + 15; let x16 := ...
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/- Copyright (c) 2020 Simon Hudon. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Author: Simon Hudon -/ import testing.slim_check.testable /-! ## Finding counterexamples automatically using `slim_check` A proposition can be tested by writing it out as: ```lean example (xs ...
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-- Copyright (c) 2014 Jeremy Avigad. All rights reserved. -- Released under Apache 2.0 license as described in the file LICENSE. -- Authors: Jeremy Avigad, Leonardo de Moura -- algebra.group -- ============= -- Various structures with 1, *, inv, including groups. import logic.eq import data.unit data.sigma data.prod...
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-- set_option autoBoundImplicitLocal false universes u variable {α : Type u} variable {β : α → Type v} theorem ex {p₁ p₂ : Sigma (fun a => β a)} (h₁ : p₁.1 = p₂.1) (h : p₁.2 ≅ p₂.2) : p₁ = p₂ := match p₁, p₂, h₁, h with | ⟨_, _⟩, ⟨_, _⟩, rfl, HEq.refl _ => rfl
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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 Std.Data.HashMap import Lean.ImportingFlag import Lean.Data.SMap import Lean.Declaration import Lean.LocalContext import Lean.Util.Path import Lean.U...
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/- Copyright (c) 2020 Yury Kudryashov All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Yury Kudryashov -/ import algebra.ring.prod import group_theory.submonoid import data.equiv.ring /-! # Bundled subsemirings We define bundled subsemirings and some standard construc...
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/- Copyright (c) 2019 Chris Hughes. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Chris Hughes -/ import order.well_founded import algebra.group.pi import order.min_max /-! # Lexicographic order on Pi types This file defines the lexicographic order for Pi types. `a`...
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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, Mario Carneiro -/ import data.rat.order import data.int.char_zero /-! # Casts for Rational Numbers ## Summary We define the canonical injection from ℚ into an arbitr...
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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, Scott Morrison -/ import tactic.solve_by_elim example {a b : Prop} (h₀ : a → b) (h₁ : a) : b := begin apply_assumption, apply_assumption, end example {X : Type} (x : X)...
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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 algebra.group data.set .subgroup namespace group open algebra -- ⁻¹ in eq.ops conflicts with group ⁻¹ -- open eq.ops notation H1 ▸ H2 := eq.subst H1 H2 open set...
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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 category_theory.limits.cones import category_theory.discrete_category universes v u open category_theory namespace category_theory.limits @[derive decidabl...
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-- Theorems for axiomatization: -- mulhu_comm, mul_decomp, urem_of_sub_mul_udiv import bv.lemmas open nat open bv open bv.helper -- mulhu represents the upper bits of the result of a 2n-bit multiplication, -- by zero-extending two n-bit operands. For example, it can be used to model -- the behavior of RISC-V's mul...
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/- Copyright (c) 2022 Scott Morrison. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Scott Morrison -/ import algebra.group.pi import category_theory.limits.shapes.biproducts import algebra.category.Module.limits /-! # The category of `R`-modules has finite biproducts...
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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: Anatole Dedecker, Sébastien Gouëzel, Yury G. Kudryashov, Dylan MacKenzie, Patrick Massot -/ import analysis.asymptotics.asymptotics import analysis.specific_limits.basic /-! # A co...
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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 -/ import order.filter.lift import topology.separation /-! # Uniform spaces Uniform spaces are a generalization of metric spaces and top...
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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 tactic.tfae import tactic.fin_cases /-! # Locally constant function...
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/- Copyright (c) 2022 Violeta Hernández Palacios. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Violeta Hernández Palacios -/ import data.polynomial.cardinal import ring_theory.algebraic /-! ### Cardinality of algebraic numbers > THIS FILE IS SYNCHRONIZED WITH MATH...
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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 data.finset.basic import data.multiset.pi /-! # The cartesian product of finsets -/ namespace finset open multiset /-! ### pi -/ section pi variables {α : T...
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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 -/ import analysis.specific_limits.basic import order.filter.countable_Inter import topology.G_delta /-! # Baire theorem In a complete metric space, a countable ...
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-- Shows that logical and is commutative theorem my_and_comm : ∀ p q, p ∧ q ↔ q ∧ p := ( assume p q, iff.intro ( assume h: p ∧ q, show q ∧ p, from and.intro (and.right h) (and.left h) ) ( assume h: q ∧ p, show p ∧ q, from and...
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import data.set.basic open function variable {α : Type*} -- BEGIN theorem Cantor : ∀ f : α → set α, ¬ surjective f := begin intros f surjf, let S := { i | i ∉ f i}, rcases surjf S with ⟨j, h⟩, have h₁ : j ∉ f j, { intro h', have : j ∉ f j, { by rwa h at h' }, contradiction }, have h₂ : j ∈ ...
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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 macros import subtype definition reflexive {A : Type} (r : A → A → Bool) := ∀ a, r a a definition symmetric {A : Type} (r : A → A → Bool) := ∀...
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/- Copyright (c) 2021 Manuel Candales. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Manuel Candales -/ import data.real.basic import data.set.basic import data.set.finite /-! # IMO 2008 Q2 (a) Prove that ``` x^2 / (x-1)^2 + y^2 / (y-1)^2 + z^2 / ...