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import ..sql import ..u_semiring import ..extra_constants import ..ucongr import ..TDP ..canonize set_option profiler true open Expr open Proj open Pred open SQL open tree notation `int` := datatypes.int variable integer_10: const datatypes.int lemma IndexQ0: forall Ξ“ r (R: relation r) t0 (l: const t0) ...
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/- Copyright (c) 2019 Alexander Bentkamp. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Alexander Bentkamp, Yury Kudriashov, YaΓ«l Dillies -/ import algebra.module.ordered import linear_algebra.affine_space.affine_subspace /-! # Convex sets and functions in vector spa...
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/- Copyright (c) 2022 Markus Himmel. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Markus Himmel -/ import category_theory.limits.shapes.biproducts import group_theory.eckmann_hilton /-! # Constructing a semiadditive structure from binary biproducts > THIS FILE IS S...
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-- anything after two minus signs like this is a comment. variables P Q R : Prop -- P, Q, R are now true/false statements. -- Reminder : ∧ means "and". theorem basic_logic : (P β†’ Q) ∧ (Q β†’ R) β†’ (P β†’ R) := begin intro H, -- H is "P implies Q and Q implies R" have HPQ : P β†’ Q, exact H.left, have HQR : Q β†’ R, exact H.r...
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/- Copyright (c) 2022 Jujian Zhang. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Jujian Zhang, Eric Wieser -/ import ring_theory.graded_algebra.homogeneous_ideal /-! This file contains a proof that the radical of any homogeneous ideal is a homogeneous ideal ## Ma...
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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.tactic.basic import Mathlib.data.equiv.basic import Mathlib.PostPort universes u v uβ‚€ u₁ vβ‚€ v₁...
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/- Copyright (c) 2018 Chris Hughes. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Chris Hughes -/ import data.fintype.basic import data.finset.sort import algebra.group.conj import algebra.big_operators.basic universes u v open equiv function fintype finset open_loca...
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/- Copyright (c) 2021 Floris van Doorn. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Floris van Doorn -/ import Mathlib.PrePort import Mathlib.Lean3Lib.init.default import Mathlib.measure_theory.prod import Mathlib.measure_theory.group import Mathlib.PostPort univer...
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/- Copyright (c) 2020 Scott Morrison. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Scott Morrison -/ import algebra.hom.group import category_theory.discrete_category import category_theory.monoidal.natural_transformation /-! # Monoids as discrete monoidal categorie...
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/- Copyright (c) 2019 Amelia Livingston. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Amelia Livingston -/ import group_theory.congruence import group_theory.submonoid import algebra.group.units import algebra.punit_instances /-! # Localizations of commutative monoi...
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theorem succ_eq_succ_iff (a b : β„•) : nat.succ a = nat.succ b ↔ a = b := begin split, intro h, exact nat.succ.inj h, intro f, repeat {rw nat.succ_eq_add_one}, rw f, 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. Author: Robert Y. Lewis Analytic facts about polynomials. -/ import topology.algebra.topological_structures data.polynomial lemma polynomial.continuous_eval {Ξ±} [comm_semiring Ξ±] [decidable...
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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, Floris van Doorn -/ import algebra.group universes u v variable {Ξ± : Type u} section variable [semiring Ξ±] theorem mul_two (n : Ξ±) : n * 2 = n + n :...
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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, Chris Hughes, Kevin Buzzard -/ import algebra.group.hom /-! # Lift monoid homomorphisms to group homomorphisms of their units subgroups. -/ universes u v w namespace u...
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/- Copyright (c) 2018 Simon Hudon. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Simon Hudon, Patrick Massot -/ import algebra.group.pi import algebra.order.group import tactic.pi_instances /-! # Pi instances for ordered groups and monoids This file defines instances...
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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 -/ import data.set.function /-! # Equivalence between types In this file we define two types: * `equiv Ξ± Ξ²` a.k.a. `Ξ± ≃ Ξ²`: a bijective map ...
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example (p q : Prop) : p ∧ q β†’ p := by refine fun ⟨a, b⟩ => a example (p q : Prop) : p ∧ q β†’ p := by refine fun a => ?hp trace_state exact a.1 example (p q : Prop) : p ∧ q β†’ p := by refine fun ⟨a, b⟩ => a example (p q : Prop) : p ∧ q β†’ p := by refine fun ⟨a, b⟩ => ?hp trace_state exact a example (p ...
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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 -/ import logic.unique import order.boolean_algebra /-! # Basic properties of sets Sets in Lean are homogeneous; all their elements have the same type...
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/- Copyright (c) 2015 Robert Y. Lewis. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Author: Robert Y. Lewis Basic facts about the positive natural numbers. Developed primarily for use in the construction of ℝ. For the most part, the only theorems here are those needed for t...
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set_option pp.motives.pi false #print Nat.add set_option pp.motives.pi true #print Nat.add theorem ex : βˆ€ {Ξ± Ξ² : Sort u} (h : Ξ± = Ξ²) (a : Ξ±), cast h a β‰… a | Ξ±, _, rfl, a => HEq.refl a set_option pp.motives.nonConst false #print ex set_option pp.motives.nonConst true #print ex noncomputable def fact (n : Nat)...
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import standard open classical namespace hide -- BEGIN theorem prop_complete (a : Prop) : a = true ∨ a = false := or.elim (em a) (λ t, or.inl (propext (iff.intro (λ h, trivial) (λ h, t)))) (λ f, or.inr (propext (iff.intro (λ h, absurd h f) (λ h, false.elim h)))) -- END end hide
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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 logic.basic data.bool data.option.defs tactic.basic namespace option variables {Ξ± : Type*} {Ξ² : Type*} {Ξ³ : Type*} @[simp] theorem get_mem : βˆ€ {o : option Ξ±}...
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/- Copyright (c) 2014 Microsoft Corporation. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Module: init.trunc Authors: Jeremy Avigad, Floris van Doorn Ported from Coq HoTT. TODO: can we replace some definitions with a hprop as codomain by theorems? -/ prelude import .logic...
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/- Copyright (c) 2019 SΓ©bastien GouΓ«zel. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Author: SΓ©bastien GouΓ«zel The Gromov-Hausdorff distance on the space of nonempty compact metric spaces up to isometry. We introduces the space of all nonempty compact metric spaces, up to ...
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/- Copyright (c) 2014 Floris van Doorn. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Author: Floris van Doorn A classical treatment of quotients, using Hilbert choice. -/ import algebra.relation import .basic namespace quotient open relation nonempty subtype classical /- a...
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/- Copyright (c) 2019 Robert A. Spencer. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Robert A. Spencer, Markus Himmel -/ import algebra.category.Group.preadditive import category_theory.linear.basic import category_theory.elementwise import linear_algebra.basic impo...
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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.function.conditional_expectation.real import topology.instances.discrete /-! # Filtration and stopping time This file defines some standard definiti...
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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: Leonardo de Moura -/ import Lean.Elab.Log namespace Lean.Elab namespace OpenDecl variable [Monad m] [STWorld IO.RealWorld m] [MonadEnv m] variable [MonadExceptOf Exception m] ...
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/- Copyright (c) 2018 Jeremy Avigad. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Jeremy Avigad Operations on set-valued functions, aka partial multifunctions, aka relations. -/ import tactic.basic data.set.lattice order.complete_lattice logic.relator variables {Ξ± ...
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/- Copyright (c) 2021 Chris Birkbeck. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Chris Birkbeck -/ import linear_algebra.matrix.nonsingular_inverse import linear_algebra.special_linear_group /-! # The General Linear group $GL(n, R)$ This file defines the elements...
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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: Adam Topaz -/ import data.finset.basic /-! # Constructions involving sets of sets. ## Finite Intersections We define a structure `has_finite_inter` which asserts that a set `S` of subse...
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-- Copyright (c) 2017 Scott Morrison. All rights reserved. -- Released under Apache 2.0 license as described in the file LICENSE. -- Authors: Tim Baumann, Stephen Morgan, Scott Morrison, Floris van Doorn import category_theory.functor universes v u -- declare the `v`'s first; see `category_theory.category` for an exp...
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/- Copyright (c) 2019 Microsoft Corporation. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Leonardo de Moura, Sebastian Ullrich -/ /-! # Basic Lean parser infrastructure The Lean parser was developed with the following primary goals in mind: * flexibility: Lean's g...
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/- Copyright (c) 2022 Jujian Zhang. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Adam Topaz, Jujian Zhang -/ import category_theory.abelian.functor_category import category_theory.preadditive.additive_functor import category_theory.preadditive.functor_category import...
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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: Leonardo de Moura -/ prelude import init.meta.smt.smt_tactic init.meta.interactive_base import init.meta.smt.rsimp namespace smt_tactic meta def save_info (p : pos) : smt_tacti...
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/- Copyright (c) 2021 Kevin Buzzard. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Kevin Buzzard -/ import group_theory.general_commutator import group_theory.quotient_group /-! # Nilpotent groups An API for nilpotent groups, that is, groups for which the upper ce...
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/- Copyright (c) 2021 SΓ©bastien GouΓ«zel. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: SΓ©bastien GouΓ«zel -/ import measure_theory.measure.measure_space /-! # Vitali families On a metric space `X` with a measure `ΞΌ`, consider for each `x : X` a family of measurable s...
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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 order.conditionally_complete_lattice import algebra.big_operators.basic import algebra.group.prod import algebra.group.pi /-! # Support of a function In th...
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/- Copyright (c) 2020 Fox Thomson. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Fox Thomson, Markus Himmel -/ import data.nat.bitwise import set_theory.game.birthday import set_theory.game.impartial /-! # Nim and the Sprague-Grundy theorem This file contains the de...
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open nat eq infixr + := sum theorem add_assoc₁ : Ξ  (a b c : β„•), (a + b) + c = a + (b + c) | a b 0 := eq.refl (nat.rec a (Ξ» x, succ) b) | a b (succ n) := calc (a + b) + (succ n) = succ ((a + b) + n) : rfl ... = succ (a + (b + n)) : ap succ (add_assoc₁ a b n) ... = a + (succ...
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-- Copyright (c) Microsoft Corporation. All rights reserved. -- Licensed under the MIT license. import system.io import smt2.syntax import smt2.builder import .irsem import .lang import .common import .bitvector import .smtexpr import .smtcompile open io def irsem_smt : irsem := { intty := sbitvec, poisonty := sbool,...
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/- Copyright (c) 2019 Oliver Nash. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Oliver Nash -/ import ring_theory.algebra import linear_algebra.linear_action /-! # Lie algebras This file defines Lie rings, and Lie algebras over a commutative ring. It shows how thes...
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/- Copyright (c) 2014 Jeremy Avigad. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Author: Jeremy Avigad, Leonardo de Moura -/ import tactic.ext tactic.finish data.subtype tactic.interactive open function /- set coercion to a type -/ namespace set instance {Ξ± : Type*} : has_...
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import category_theory.isomorphism import category_theory.yoneda open category_theory open opposite variables {C : Type*} [category C] /-! Hint 1: `yoneda` is set up so that `(yoneda.obj X).obj (op Y) = (Y ⟢ X)` (we need to write `op Y` to explicitly move `Y` to the opposite category). -/ /-! Hint 2: If you have a ...
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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, Jalex Stark. -/ import Mathlib.PrePort import Mathlib.Lean3Lib.init.default import Mathlib.data.polynomial.monic import Mathlib.tactic.linarith.default import Mathlib.P...
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/- Separate compilation and syntactic linking -/ import .ast .maps .lib /- This file follows "approach A" from the paper "Lightweight Verification of Separate Compilation" by Kang, Kim, Hur, Dreyer and Vafeiadis, POPL 2016. -/ namespace linking open ast maps /- * Syntactic linking -/ /- A syntactic ele...
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/- Copyright (c) 2021 Jakob Scholbach. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Jakob Scholbach -/ import algebra.algebra.basic import algebra.char_p.exp_char import field_theory.separable /-! # Separable degree This file contains basics about the separable de...
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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, Fabian GlΓΆckle Dual vector spaces, the spaces of linear functionals to the base field, including the dual basis isomorphism and evaluation isomorphism in the finite-di...
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section parameters {A : Type*} (a : A) variable f : A β†’ A β†’ A definition id2 : A := a #check id2 definition pr (b : A) : A := f a b #check pr f id2 set_option pp.universes true #check pr f id2 definition pr2 (B : Type*) (b : B) : A := a #check pr2 nat 10 end
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open tactic universe l constants (A : Type.{l}) (rel : A β†’ A β†’ Prop) (rel.refl : βˆ€ a, rel a a) (rel.symm : βˆ€ a b, rel a b β†’ rel b a) (rel.trans : βˆ€ a b c, rel a b β†’ rel b c β†’ rel a c) attribute [refl] rel.refl attribute [symm] rel.symm attribute [trans] rel.trans constants (x y z : A) (...
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theorem Array.sizeOf_lt_of_mem' [DecidableEq Ξ±] [SizeOf Ξ±] {as : Array Ξ±} (h : a ∈ as) : sizeOf a < sizeOf as := by simp [Membership.mem, contains, any, Id.run, BEq.beq, anyM] at h let rec aux (j : Nat) : anyM.loop (m := Id) (fun b => decide (a = b)) as as.size (Nat.le_refl ..) j = true β†’ sizeOf a < sizeOf as := by...
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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, Simon Hudon, SΓ©bastien GouΓ«zel, Scott Morrison -/ import logic.nonempty import tactic.lint import tactic.dependencies setup_tactic_parser namespace tactic namespace i...
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import Mathlib.PrePort import Mathlib.Lean3Lib.init.meta.default import Mathlib.Lean3Lib.init.logic import Mathlib.Lean3Lib.init.data.nat.lemmas import Mathlib.Lean3Lib.init.data.char.basic namespace Mathlib namespace char theorem val_of_nat_eq_of_is_valid {n : β„•} : is_valid_char n β†’ val (of_nat n) = n := sorry ...
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/- Copyright (c) 2020 Damiano Testa. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Damiano Testa -/ import Mathlib.PrePort import Mathlib.Lean3Lib.init.default import Mathlib.data.polynomial.degree.default import Mathlib.data.polynomial.degree.trailing_degree import M...
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import category_theory.limits.shapes.biproducts /-! Let's show that every preadditive category embeds into a preadditive category with biproducts, and identify a good universal property. -/ universes v u variables (C : Type u) structure family := (ΞΉ : Type v) [fintype : fintype ΞΉ] [decidable_eq : decidable_eq ΞΉ] (v...
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-- Estudante: Lucas Emanuel Resck Domingues import data.set -- Exercise 1 section open function int algebra def f (x : β„€) : β„€ := x + 3 def g (x : β„€) : β„€ := -x def h (x : β„€) : β„€ := 2 * x + 3 example : injective f := assume x1 x2, assume h1 : x1 + 3 = x2 + 3, -- Lean knows t...
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/- Rewriting the Coq Cyclone Formal Syntax in Lean. -/ import .LeanLib /- TODO Lean 4 has enumerations, should I be using it? -/ inductive Kappa : Type | B /- 'boxed' kind. -/ | A /- 'any' kind. -/ export Kappa inductive Phi : Type | witnesschanges /- Allowing witness changes. \delta -/ | aliases /-...
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/- Copyright (c) 2019 Alexander Bentkamp. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Alexander Bentkamp, Yury Kudriashov, YaΓ«l Dillies -/ import algebra.order.invertible import algebra.order.smul import linear_algebra.affine_space.midpoint import linear_algebra.ray...
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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 HΓΆlzl, Scott Morrison, Jens Wagemaker -/ import algebra.gcd_monoid.basic import data.polynomial.derivative import data.polynomial.ring_division import data.set.pai...
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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 HΓΆlzl, Scott Morrison, Jens Wagemaker -/ import data.polynomial.derivative /-! # Theory of univariate polynomials The main def is `binom_expansion`. -/ noncompu...
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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 data.real.basic algebra.field order.filter.filter_product anal...
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import o_minimal.coordinates import o_minimal.structure -- Stripped-down version of `o_minimal.definable` -- without implicit definability hypotheses on the types. universe u namespace o_minimal open_locale finvec variables {R : Type u} (S : struc R) variables {X : Type*} [has_coordinates R X] variables {Y : Type...
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/- Copyright (c) 2019 Alexander Bentkamp. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Alexander Bentkamp Convex sets and functions on real vector spaces -/ import analysis.normed_space.basic import data.complex.basic import data.set.intervals import tactic.interac...
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/- Copyright (c) 2021 Yourong Zang. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Yourong Zang -/ import analysis.complex.isometry import analysis.normed_space.conformal_linear_map /-! # Conformal maps between complex vector spaces We prove the sufficient and necess...
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/- Copyright (c) 2018 Johannes HΓΆlzl. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Johannes HΓΆlzl -/ import data.multiset.bind /-! # Sections of a multiset -/ namespace multiset variables {Ξ± : Type*} section sections /-- The sections of a multiset of multisets `s...
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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. -/ import tactic.interactive data.option.defs section pending_1857 /- Transport multiplicative to add...
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/- Copyright (c) 2021 OpenAI. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Kunhao Zheng -/ import data.real.basic example (p q : ℝ β†’ ℝ) (hβ‚€ : βˆ€ x, p x = 2 - x ^ 2) (h₁ : βˆ€ xβ‰ 0, q x = 6 / x) : p ( q 2) = -7 := begin rw [hβ‚€, h₁], ring, linarith, end
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import Lean #eval Lean.Compiler.compile #[``Lean.Compiler.LCNF.Simp.etaPolyApp?]
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structure Foo where x1 : Nat := 0 x2 : Nat := 0 x3 : Nat := 0 x4 : Nat := 0 x5 : Nat := 0 x6 : Nat := 0 x7 : Nat := 0 x8 : Nat := 0 x9 : Nat := 0 x10 : Nat := 0 y1 : Nat := 0 y2 : Nat := 0 y3 : Nat := 0 y4 : Nat := 0 y5 : Nat := 0 y6 : Nat := 0 y7 : Nat := 0 y8 : Nat...
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/- Copyright (c) 2022 Vincent Beffara. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Vincent Beffara -/ import analysis.analytic.basic import analysis.calculus.dslope import analysis.calculus.fderiv_analytic import analysis.calculus.formal_multilinear_series import an...
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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 topology.sheaves.presheaf import category_theory.limits.punit import category_theory.limits.shapes.products import category_theory.limits.shapes.equalizers /-...
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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, Michael Howes -/ import group_theory.quotient_group import tactic.group /-! # The abelianization of a group This file defines the commutator and the abelianization of a group. ...
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inductive list (A : Type) : Type := | nil : list A | cons : A β†’ list A β†’ list A check list.{1} check cons.{1} check list_rec.{1 1}
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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. Authors: Jakob von Raumer, Floris van Doorn Ported from Coq HoTT -/ prelude import .trunc .equiv .ua open eq is_trunc sigma function is_equiv equiv prod unit prod.ops lift /- We now pro...
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/- Copyright (c) 2019 Neil Strickland. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Author: Neil Strickland -/ import Mathlib.PrePort import Mathlib.Lean3Lib.init.default import Mathlib.data.pnat.prime import Mathlib.data.multiset.sort import Mathlib.data.int.gcd import Mathl...
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/- Copyright (c) 2019 SΓ©bastien GouΓ«zel. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: SΓ©bastien GouΓ«zel The mean value inequality: a bound on the derivative of a function implies that this function is Lipschitz continuous for the same bound. -/ import analysis.calcu...
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/- Copyright (c) 2020 Eric Wieser. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Eric Wieser, Utensil Song -/ import algebra.ring_quot import linear_algebra.tensor_algebra.basic import linear_algebra.exterior_algebra.basic import linear_algebra.quadratic_form.basic ...
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inductive {u} dependent_list (A : Type u) (f : A β†’ Type u) (g : Ξ  a : A, f a β†’ A) : A β†’ A β†’ Type (u+1) | nil : Ξ  a: A, (dependent_list a a) | cons : Ξ  { a b : A }, Ξ  x : f b, (dependent_list a b) β†’ dependent_list a (g b x) open nat definition divisor_chain : β„• β†’ β„• β†’ Type 1 := dependent_list β„• (Ξ» m: β„•, { k : β„• // k ∣...
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variable {Ξ± : Type*} def is_prefix (l₁ : list Ξ±) (lβ‚‚ : list Ξ±) : Prop := βˆƒ t, l₁ ++ t = lβ‚‚ infix ` <+: `:50 := is_prefix section local attribute [simp] theorem list.is_prefix_refl (l : list Ξ±) : l <+: l := ⟨[], by simp⟩ example : [1, 2, 3] <+: [1, 2, 3] := by simp end -- error: -- example : [1, 2, 3] <...
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/- Copyright (c) 2017 Johannes HΓΆlzl. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Author: Johannes HΓΆlzl -/ import tactic.lint -- Lean complains if this section is turned into a namespace open function section subtype variables {Ξ± : Sort*} {p : Ξ± β†’ Prop} @[simp] theorem su...
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import mynat.definition -- Imports the natural numbers. import mynat.add -- imports addition. import world02.level01 -- hide import world02.level02 -- hide import world02.level03 -- hide import world02.level04 -- hide import world02.level05 -- hide namespace mynat -- hide lemma add_right_comm (a b c : mynat) : a + ...
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def my_pre_config1 : smt_pre_config := { default_smt_pre_config . zeta := tt } def my_pre_config2 : smt_pre_config := { default_smt_pre_config with zeta := tt }
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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 -/ import logic.unique import logic.relation import order.boolean_algebra /-! # Basic properties of sets Sets in Lean are homogeneous; all their eleme...
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/- Copyright (c) 2020 SΓ©bastien GouΓ«zel. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: SΓ©bastien GouΓ«zel -/ import linear_algebra.basic import algebra.algebra.basic import tactic.omega import data.fintype.sort /-! # Multilinear maps We define multilinear maps as map...
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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.Attributes namespace Lean inductive ReducibilityStatus := | reducible | semireducible | irreducible instance : Inhabited ReducibilityStatus...
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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.fix_reflect_string /-! # Documentation commands We generate html documentation from mathlib. It is convenient to collect lists of tactics, commands...
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import tactic import tactic.suggest import tactic.nth_rewrite import data.fintype.basic import data.setoid.partition variables {Ξ± : Type} {Ξ² : Type} {Ξ³ : Type} open_locale classical open_locale big_operators lemma lift_disjoint_to_finset (s1 s2 : set Ξ±) [fintype Ξ±] (h : disjoint s1 s2) : disjoint s1.to_finset s2.to_...
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/- Copyright (c) 2021 Alex J. Best. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Alex J. Best, YaΓ«l Dillies -/ import algebra.bounds /-! # Pointwise operations on ordered algebraic objects This file contains lemmas about the effect of pointwise operations on sets w...
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structure graph: Type 1 := (vertex : Type) (edge: vertex β†’ vertex β†’ Prop) (undirected: βˆ€ a b: vertex, edge a b ↔ edge b a) (no_loops : βˆ€ a: vertex, Β¬ edge a a) notation a - b := graph.edge a b class graphs: Type 1 := (empty: graph) (g : graph) (add_vertex : graph β†’ graph) (add_edge : graph β†’ graph.vertex g β†’ graph.ve...
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/- Copyright (c) 2018 Simon Hudon. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Author: Simon Hudon Functors with two arguments -/ import data.sum category.basic category.functor tactic.basic universes uβ‚€ u₁ uβ‚‚ vβ‚€ v₁ vβ‚‚ class bifunctor (F : Type uβ‚€ β†’ Type u₁...
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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 -/ import ring_theory.integral_closure /-! # Algebraic elements and algebraic extensions An element of an R-algebra is algebraic over R if it is the root of a nonzero ...
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/- Copyright (c) 2018 Johannes HΓΆlzl. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Johannes HΓΆlzl, Kenny Lau, Johan Commelin, Mario Carneiro, Kevin Buzzard, Amelia Livingston, Yury Kudryashov -/ import group_theory.submonoid.basic import data.equiv.mul_add import al...
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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 HΓΆlzl, Yury Kudryashov Homomorphisms of multiplicative and additive (semi)groups and monoids. ...
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universes u #check true ∧ false ∨ (3 > 1 β†’ 1 < 3) #check 4 = 2+2 #check βˆ€ n : β„•, n β‰  0 β†’ βˆƒ m, n = m+1 /- Curry-Howard: Propositions as types (A proposition is true if there is a value of the type.) -/ -- Functions are proofs of implication lemma p1 {a b : Prop} : a β†’ b β†’ a := Ξ» ha hb, ha -- Functions are proof...
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import mynat.definition -- hide import mynat.add -- hide import game.world2.level6andthreequarters -- hide namespace mynat -- hide /- Tactic : intro The `intro h` tactic is very simple. If we're trying to prove $P\implies Q$ with $P$ and $Q$ true/false statements, then `intro h` is Lean's way of saying "Let's assume $...
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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.tactic init.meta.set_get_option_tactics structure cc_config := /- If tt, congruence closure will treat implicit instance arguments...
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def foo (n : Nat) : Nat := if n = 0 then 0 else let x := n - 1 have := match () with | _ => trivial foo x termination_by _ n => n decreasing_by sorry theorem ex : foo 0 = 0 := by unfold foo sorry #check @foo._unfold
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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 algebra.group.defs import data.fun_like.basic import logic.embedding import logic.equiv.set import order.rel_classes /-! # Relation homomorphisms, embeddings,...
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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 Free groups as a quotient over the reduction relation `a * x * x⁻¹ * b = a * b`. First we introduce the one step reduction relation `free_group.red.step`: w * x * x⁻¹ * v ~...