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import standard import logic.eq open classical eq.ops section parameter p : Prop definition U (x : Prop) : Prop := x = true ∨ p definition V (x : Prop) : Prop := x = false ∨ p noncomputable definition u := epsilon U noncomputable definition v := epsilon V lemma u_def : U u := epsilon_spec (exists.intro true (or.in...
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import Lean /-- Foo structure is just a test -/ structure Foo where /-- main name -/ name : String := "hello" /-- documentation for the second field -/ val : Nat := 0 /-- documenting test axiom -/ axiom myAxiom : Nat structure Boo (α : Type) where /-- Boo constructor has a custom name -/ makeBoo :: /-- B...
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prelude constant int : Type.{1} constant nat : Type.{1} namespace int constant plus : int → int → int end int namespace nat constant plus : nat → nat → nat end nat open int nat constants a b : int #check plus a b constant f : int → int → int constant g : nat → nat → int notation A `+`:65 B:65 := f A (g B B) const...
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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 category_theory.universal.cones open category_theory namespace category_theory.limits universes u v variables {C : Type u} [category.{u v} C] {J : 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, Abhimanyu Pallavi Sudhir -/ import algebra.geom_sum import data.nat.choose.sum import data.complex.basic /-! # Exponential, trigonometric and hyperbolic trigonometric funct...
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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. Authors: Yury G. Kudryashov, Patrick Massot, Sébastien Gouëzel -/ import analysis.calculus.extend_deriv import analysis.calculus.fderiv_measurable import analysis.normed_space.dual import m...
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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 Mathlib.PrePort import Mathlib.Lean3Lib.init.default import Mathlib.category_theory.closed.cartesian import Mathlib.category_theory.limits.preserves.shapes.binary_...
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import data.cpi.species.basic import data.cpi.species.congruence_prime import data.cpi.species.normalise_prime
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definition foo_attr : user_attribute := { name := `foo, descr := "bar" } run_command attribute.register `foo_attr attribute [foo] eq.refl print [foo] print eq.refl run_command attribute.get_instances `foo >>= tactic.pp >>= tactic.trace print "---" -- compound names definition foo_baz_attr : user_attribute := ⟨`foo.b...
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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: Mario Carneiro Coinductive formalization of unbounded computations. -/ import tactic.basic import data.stream.init import logic.relator open function universes u v w /- coind...
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-- Problem 1: filtering elements of a list (30 points) -- Part A: Implement a filter (5 points) -- only keeps elements that satisfy the condition F @[simp] def filter{T} : (T -> bool) -> list T -> list T -- Implementation goes here | F l := l -- Part B: filter and boolean and (5 points) theorem filter_and (T: Type) ...
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/- Copyright (c) 2016 Jeremy Avigad. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Jeremy Avigad, Leonardo de Moura, Mario Carneiro, Johannes Hölzl, Damiano Testa, Yuyang Zhao -/ import algebra.covariant_and_contravariant import order.monotone /-! # Ordered monoids ...
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/- Copyright (c) 2019 Simon Hudon. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Simon Hudon -/ import tactic.core /-! This file provides an alternative implementation for `apply` to fix the so-called "apply bug". The issue arises when the goals is a Π-type -- wheth...
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-- section set_option pp.implicit true check id true end check id true
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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 Pi instances for algebraic structures. -/ import order.basic import algebra.module algebra.group import data.finset import tactic.pi_instances namespace pi u...
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open nat example : ℕ → ℕ → Prop | 0 0 := true | (succ n) 0 := false | 0 (succ m) := false | (succ n) (succ m) := _example n m
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/- Copyright (c) 2020 Oliver Nash. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Oliver Nash -/ import algebra.lie.basic import linear_algebra.bilinear_form /-! # Lie algebras of skew-adjoint endomorphisms of a bilinear form ## Tags lie algebra, skew-adjoint, bilin...
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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, Morenikeji Neri -/ import algebra.euclidean_domain.instances import ring_theory.unique_factorization_domain /-! # Principal ideal rings and principal ideal domains A prin...
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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.sheaf /-! # The plus construction for presheaves. > THIS FILE IS SYNCHRONIZED WITH MATHLIB4. > Any changes to this file require a correspondin...
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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 algebra.monoid_algebra noncomputable theory open set linear_map submodule open_locale classical ...
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/- Copyright (c) 2021 Yaël Dillies, Bhavik Mehta. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Yaël Dillies, Bhavik Mehta -/ import .mathlib /-! # Prerequisites for SRL -/ open_locale big_operators open finset fintype function relation variables {α : Type*} secti...
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/- Copyright (c) 2019 Mario Carneiro. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Reid Barton, Mario Carneiro, Isabel Longbottom, Scott Morrison -/ import Mathlib.PrePort import Mathlib.Lean3Lib.init.default import Mathlib.set_theory.pgame import Mathlib.PostPort u...
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import Mathlib.Algebra.Group.Defs /- Copyright (c) 2014 Microsoft Corporation. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Leonardo de Moura, Mario Carneiro -/ /-! # Binary representation of integers using inductive types Note: Unlike in Coq, where thi...
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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 algebra.algebra.subalgebra import analysis.special_functions.bernstein /-! # The Weierstrass approximation theorem for continuous functions on `[a,b]` We've ...
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/- Copyright (c) 2020 Yakov Pechersky. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Yakov Pechersky -/ import Mathlib.PrePort import Mathlib.Lean3Lib.init.default import Mathlib.data.fintype.card import Mathlib.PostPort namespace Mathlib /-! # Numeral parsers This...
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-- 1 example : 0 ≠ 1 := begin -- ¬ (0 = 1) -- (0 = 1) → false assume h, cases h, end -- 2 example : 0 ≠ 0 → 2 = 3 := begin assume h, have f : false := h (eq.refl 0), exact false.elim (f), end -- 3 example : ∀ (P : Prop), P → ¬¬P := begin assume P, assume (p : P), -- ¬¬P -- ¬P → false -- (P → ...
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/- Copyright (c) 2020 Floris van Doorn. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Author: Floris van Doorn -/ import Mathlib.PrePort import Mathlib.Lean3Lib.init.default import Mathlib.data.equiv.encodable.basic import Mathlib.data.finset.basic import Mathlib.data.set.disj...
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example (x y z : Prop) (f : x → y → z) (xp : x) (yp : y) : z := by specialize f xp yp assumption example (B C : Prop) (f : forall (A : Prop), A → C) (x : B) : C := by specialize f _ x exact f example (B C : Prop) (f : forall {A : Prop}, A → C) (x : B) : C := by specialize f x exact f example (B C : Prop)...
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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 order.basic algebra.order algebra.ordered_group algebra.ring universe u variable {α : Type u} -- TODO: this is necessary additionally to mul_nonneg otherwise...
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/- Copyright (c) 2018 Mario Carneiro. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Mario Carneiro -/ import tactic.norm_num /-! # The `abel` tactic Evaluate expressions in the language of additive, commutative monoids and groups. -/ namespace tactic namespace ab...
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namespace hidden def divides (m n : ℕ) : Prop := ∃ k, m * k = n instance : has_dvd nat := ⟨divides⟩ def even (n : ℕ) : Prop := 2 ∣ n section user_def def pow : ℕ → ℕ → ℕ-- [¬ (m = 0 ∧ n = 0)] | 0 0 := sorry | _ 0 := 1 | m (nat.succ n) := m * pow m n end user_def -- BEGIN def prime (n : ℕ) : Prop := n > 1 ∧ (∀ m ...
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/- Copyright (c) 2017 Johannes Hölzl. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Johannes Hölzl -/ import order.monotone import order.rel_classes import tactic.simps import tactic.pi_instances /-! # (Semi-)lattices Semilattices are partially ordered sets with joi...
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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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/- 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.sigma.lex import order.bounded_order /-! # Orders on a sigma type This file defines two orders on a sigma type: * The disjoint sum of orders. `a` is less `b...
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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 Infinite sum over a topological monoid This sum is known as unconditionally convergent, as it sums to the same value under all possible permutations. For Euclidean spa...
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/- Copyright (c) 2018 Johan Commelin. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Johan Commelin -/ import topology.algebra.infinite_sum.order import topology.algebra.infinite_sum.ring import topology.instances.real /-! # Topology on `ℝ≥0` > THIS FILE IS SYNCHRONI...
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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, Morenikeji Neri -/ import ring_theory.unique_factorization_domain /-! # Principal ideal rings and principal ideal domains A principal ideal ring (PIR) is a ring in which ...
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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 Mathlib.PrePort import Mathlib.Lean3Lib.init.default import Mathlib.data.quaternion import Mathlib.analysis.normed_space.inner_product import Mathlib.PostPor...
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import ..expressions.classical_geometry import ..expressions.classical_time import ..expressions.classical_velocity import ..expressions.boolean import ..expressions.classical_acceleration namespace environment structure env : Type := mk :: (g: lang.classicalGeometry.env) (t: lang.classicalTime.env) ...
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/- Copyright (c) 2016 Microsoft Corporation. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Leonardo de Moura Helper tactic for showing that a type has decidable equality. -/ prelude import init.meta.contradiction_tactic init.meta.constructor_tactic import init.meta.i...
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/- Copyright (c) 2019 Sébastien Gouëzel. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Sébastien Gouëzel -/ import topology.local_homeomorph /-! # Charted spaces A smooth manifold is a topological space `M` locally modelled on a euclidean space (or a euclidean half-...
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import system.IO meta_definition foo : nat → nat | a := nat.cases_on a 1 (λ n, foo n + 2) vm_eval (foo 10) meta_definition loop : nat → IO unit | a := do put_str ">> ", put_nat a, put_str "\n", loop (a+1)
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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 -/ namespace set universes u variable {α : Type u} lemma ext {a b : set α} (h : ∀ x, x ∈ a ↔ x ∈ b) : a = b := funext (take x, propext (h x)) lemma sub...
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import data.num namespace play constants int nat real : Type.{1} constant nat_add : nat → nat → nat constant int_add : int → int → int constant real_add : real → real → real inductive add_struct [class] (A : Type) := mk : (A → A → A) → add_struct A definition add {A : Type} {S : add_struct A} (a b : A) : A := add_...
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/- Copyright (c) 2015 Jeremy Avigad. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Jeremy Avigad, Robert Y. Lewis 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 h...
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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 topology.continuous_on import group_theory.submonoid.basic import algebra.group.prod import algebra.pointwise /-! # Theory of topological mono...
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/- Copyright (c) 2021 Rémy Degenne. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Rémy Degenne -/ import measure_theory.function.lp_space import analysis.normed_space.lattice_ordered_group /-! # Order related properties of Lp spaces ### Results - `Lp E p μ` is an `...
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variable (xs : List Nat) theorem foo1 : xs = xs := by induction xs <;> rfl theorem foo2 : xs = xs := by cases xs with | nil => rfl | cons x xs => rfl
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import .core galois.temporal.temporal order.complete_lattice universes u open temporal lattice namespace sequent instance subset_complete_lattice {A : Type u} : complete_lattice (subset A) := begin apply lattice.complete_lattice_fun, end instance subset_cha {A : Type u} : cha (subset A) := begin constructor, tacti...
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-- Chapter 2 namespace ch2 /- 1. Define the function Do_Twice -/ def Do_Twice (f: ℕ → ℕ) (n : ℕ) : ℕ := f (f n) #check Do_Twice #reduce Do_Twice (λ x, x * 3) 2 /- 2. Define the functions curry and uncurry -/ def curry (f : ℕ × ℕ → ℕ) (a b : ℕ) : ℕ := f (a, b) def uncurry (f : ℕ → ℕ → ℕ) (c : ℕ × ℕ) : ℕ := f c.1 c.2...
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/- Copyright (c) 2017 Gabriel Ebner. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Gabriel Ebner -/ import .clause .prover_state .utils open tactic monad namespace super variable gt : expr → expr → bool variables (ac1 ac2 : derived_clause) variables (c1 c2 : clause)...
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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 set-quotients, i.e. quotient of a mere relation which is then set-truncated. -/ import .quotient .trunc function open eq is_trunc trunc quotient eq...
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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, Leonardo de Moura This file demonstrates how to encode vectors using indexed inductive families. In standard library we do not use this approach. -/ import data.nat...
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/- Copyright (c) 2015 Microsoft Corporation. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Leonardo de Moura, Jeremy Avigad, Mario Carneiro Prime numbers. -/ import data.nat.sqrt data.nat.gcd data.list.basic data.list.perm open bool subtype namespace nat open decida...
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def ack: nat -> nat -> nat | 0 n := n + 1 | (m + 1) 0 := ack m 1 | (m + 1) (n + 1) := ack m (ack (m + 1) n) lemma ack_2nd_lt_val: forall m n, n < ack m n := begin intro m, induction m with m' ih, show forall n, n < ack 0 n, { intro n, calc n < n + 1 : nat.le_refl _ ... = ack 0 n : by sim...
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theorem {u} not_mem_empty1 {A : Type u} (x : A) : x ∉ (∅ : set A) := assume h, h theorem {u} not_mem_empty2 {A : Type u} (x : A) : x ∉ ∅ := -- ERROR here assume h, h theorem {u} not_mem_empty3 {A : Type u} (x : A) : x ∉ (∅ : set A) := assume h : x ∈ ∅, h theorem {u} not_mem_empty4 {A : Type u} (x : A) : x ∉ (∅ : se...
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/- Copyright (c) 2021 Joscha Mennicken. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Joscha Mennicken -/ import Lean.Data.Lsp.Internal import Lean.Server.Utils /-! # Representing collected and deduplicated definitions and usages -/ namespace Lean.Server open Lsp L...
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import .comp namespace polya open native meta def sum_form := rb_map expr ℚ meta def expr_coeff_list_to_expr : list (expr × ℚ) → tactic expr | [] := return `(0 : ℚ) | [(e, q)] := tactic.to_expr ``(%%(↑q.reflect : expr)*%%e) | ((e, q)::t) := do e' ← expr_coeff_list_to_expr t, h ← tactic.to_expr ``(%%(q.reflect : expr...
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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, Johannes Hölzl -/ import algebra.algebra.pi import algebra.algebra.restrict_scalars import analysis.normed.field.basic import data.real.sqrt /-! # Normed spaces In th...
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import .lovelib /- # LoVe Demo 13: Rational and Real Numbers We review the construction of `ℚ` and `ℝ` as quotient types. A procedure to construct types with specific properties: 1. Create a new type that can represent all elements, but not necessarily in a unique manner. 2. Quotient this representation, equat...
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import tactic.lint -- The following simp lemma has the variable `f` as head symbol of the left-hand side: @[simp] axiom const_zero_eq_zero (f : ℕ → ℕ) (x) : f x = 0 example (f : ℕ → ℕ) : f 42 = 0 := begin -- Hence it doesn't work: success_if_fail {simp}, -- BTW, rw doesn't work either: success_if_fail {rw co...
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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.quadratic_form.isometry /-! # Clifford Algebras > THIS FILE IS SY...
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open is_trunc context parameters {P : Π(A : Type), A → Type} definition my_contr {A : Type} [H : is_contr A] (a : A) : P A a := sorry definition foo2 (A : Type) (B : A → Type) (a : A) (x : B a) (H : Π (a : A), is_contr (B a)) --(H : is_contr (B a)) : P (B a) x := by apply (@my_contr _ _) end
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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, Floris van Doorn -/ import category_theory.eq_to_hom namespace category_theory universes v₁ v₂ u₁ u₂ -- declare the `v`'s first; see `category_theory....
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#lang lean4 import Lean namespace Lean def ex1 : CoreM Nat := do let env ← getEnv pure $ privateExt.getState env #eval ex1 def ex2 : CoreM Nat := do let env ← getEnv pure $ { privateExt with idx := 3 }.getState env -- Error -- #eval ex2 end Lean
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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 Ported from Coq HoTT Theorems about products -/ open eq equiv is_equiv is_trunc prod prod.ops unit equiv.ops variables {A A' B B' C D : Type} {P Q : A → Type} ...
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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. Authors: Yury G. Kudryashov -/ import analysis.convex.function import analysis.convex.strict_convex_space import measure_theory.function.ae_eq_of_integral import measure_theory.integral.ave...
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/- Copyright (c) 2022 Alex J. Best. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Alex J. Best -/ import data.finsupp.order import order.well_founded_set /-! # Partial well ordering on finsupps This file contains the fact that finitely supported functions from a fi...
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/- Copyright (c) 2015 Nathaniel Thomas. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Nathaniel Thomas, Jeremy Avigad, Johannes Hölzl, Mario Carneiro Modules over a ring. ## Implementation notes Throughout the `linear_map` section implicit `{}` brackets are often ...
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/- Copyright (c) 2016 Floris van Doorn. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Floris van Doorn Chain complexes. We define chain complexes in a general way as a sequence X of types indexes over an arbitrary type N with a successor S. There are maps X (S n) → ...
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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 order.synonym /-! # Comparison This file provides basic results about orderings and comparison in linear orders. ## Definitions * `cmp_le`: An `ordering` ...
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/- Copyright (c) 2018 Rohan Mitta. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Rohan Mitta, Kevin Buzzard, Alistair Tucker, Johannes Hölzl, Yury Kudryashov -/ import topology.metric_space.basic import category_theory.endomorphism import category_theory.types /-! # ...
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/- Copyright (c) 2018 Mario Carneiro. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Mario Carneiro -/ import computability.partrec_code /-! # Computability theory and the halting problem A universal partial recursive function, Rice's theorem, and the halting problem...
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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.Util.MonadCache import Lean.LocalContext namespace Lean /- The metavariable context stores metavariable declarations and their assignments. It...
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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, Callum Sutton, Yury Kudryashov -/ import algebra.group.hom import algebra.group.type_tags import algebra.group.units_hom import algebra.group_with_zero /-! # Multiplic...
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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 Subtype of open subsets in a topological space. -/ import topology.bases topology.subset_properties topology.constructions open filter lattice variable...
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/- Copyright (c) 2019 Microsoft Corporation. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Leonardo de Moura -/ prelude import Init.Data.HashMap import Init.Data.PersistentHashMap universes u v w w' namespace Lean /- Staged map for implementing the Environment. The ...
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import game.world3.level10 -- hide import game.world2.level7 -- succ ne zero -- hide import game.world2.level13 -- add_left_eq_zero -- hide namespace mynat -- hide /- # Multiplication World ## Level 11: `mul_eq_zero_iff` Now you have `eq_zero_or_eq_zero_of_mul_eq_zero` this is pretty straightforward. -/ /- Theorem...
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/- Copyright © 2020 Nicolò Cavalleri. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Nicolò Cavalleri -/ import ring_theory.derivation.lie import geometry.manifold.derivation_bundle /-! # Left invariant derivations > THIS FILE IS SYNCHRONIZED WITH MATHLIB4. > Any c...
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/- Copyright (c) 2020 Yakov Pechersky. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Yakov Pechersky -/ import data.string.basic import data.buffer.basic import data.nat.digits /-! # Parsers `parser α` is the type that describes a computation that can ingest a `char...
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new_frontend def f : List Int → Bool := fun _ => true def ex3 : IO Bool := do let xs ← pure [1, 2, 3]; pure $ f xs -- Works inductive Expr | val : Nat → Expr | app : Expr → Expr → Expr instance : Coe Nat Expr := ⟨Expr.val⟩ def foo : Expr → Expr := fun e => e def ex1 : Bool := f [1, 2, 3] -- Works def ex2 : Bool...
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/- Copyright (c) 2014 Microsoft Corporation. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Leonardo de Moura notation, basic datatypes and type classes -/ prelude notation `Prop` := Sort 0 notation f ` $ `:1 a:0 := f a /- Reserving notation. We do this sot that the...
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import data.nat.parity tactic open nat example : ∀ m n : nat, even n → even (m * n) := begin -- say m and n are natural numbers, and assume n=2*k rintros m n ⟨k, hk⟩, -- We need to prove m*n is twice a natural. Let's show it's twice m*k. use m * k, -- substitute in for n rw hk, -- and now it's obvious ...
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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: Johannes Hölzl, Mario Carneiro, Alexander Bentkamp, Anne Baanen -/ import linear_algebra.finsupp import order.zorn import data.finset.order import data.equiv.fin /-! # Linear independen...
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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 tactic data.set.basic universes u v variable {α : Type u} section variable [semiring α] theorem mul_two...
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-- LEAN (* definition prefix_sum : ℕ → list ℕ → list ℕ | sum [] := [sum] | sum (head :: tail) := sum :: (prefix_sum (sum + head) tail). definition plus_list : list ℕ → list ℕ → list ℕ | [] _ := [] | _ [] := [] | (h1 :: t1) (h2 :: t2) := (h1 + h2) :: plus_list t1 t2. example : ∀ l1 l2 : list ℕ, prefix_sum 0 (plus_...
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open tactic nat expr option attribute [simp] lemma succ_eq_add (n : nat) : succ n = n + 1 := rfl example (a b : nat) : a = b → succ (succ a) = succ (b + 1) := by do intro `Heq, trace_state, s ← simp_lemmas.mk_default, t' ← target >>= s^.dsimplify, change t', trace "---- after change ----...
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/- Copyright (c) 2021 Jannis Limperg. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Jannis Limperg -/ -- TODO Instead of tracing, I think we want to construct a couple of big -- messages at the end: one with the ruleset, one with the final search tree, -- one with th...
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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, Alexander Bentkamp -/ import linear_algebra.finsupp import linear_algebra.projection import order.zorn import data.fintype.card /-! # Linear independe...
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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, Floris van Doorn -/ import data.ulift import data.fintype import category_theory.opposites category_theory.equivalence namespace category_theory unive...
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/- Copyright (c) 2019 Microsoft Corporation. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Leonardo de Moura -/ prelude import Init.Data.Array.Basic namespace Array -- TODO: remove the [Inhabited α] parameters as soon as we have the tactic framework for automating pr...
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lemma eq_zero_of_add_right_eq_self {a b : mynat} : a + b = a → b = 0 := begin intro h, apply add_left_cancel a, rw add_zero, exact h, end
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/- Copyright (c) 2021 Wojciech Nawrocki. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Wojciech Nawrocki, Marc Huisinga -/ import Lean.DeclarationRange import Lean.Data.Json import Lean.Data.Lsp import Lean.Server.FileWorker.Utils import Lean.Server.Requests import...
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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.CollectLevelParams import Lean.Util.Recognizers import Lean.Compiler.ExternAttr import Lean.Meta.Check import Lean.Meta.Closure import Lean...
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/- Copyright (c) 2019 Zhouhang Zhou. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Zhouhang Zhou, Frédéric Dupuis, Heather Macbeth -/ import analysis.convex.basic import analysis.inner_product_space.basic import analysis.normed_space.is_R_or_C /-! # The orthogonal pr...
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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, Callum Sutton, Yury Kudryashov -/ import data.equiv.mul_add import algebra.field import algebra.opposites /-! # (Semi)ring equivs In this file we define extension of ...
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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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/- Copyright (c) 2016 Microsoft Corporation. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Leonardo de Moura, Jeremy Avigad -/ prelude import init.data.ordering.basic init.function init.meta.name init.meta.format init.control.monad open format private meta def forma...
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/- Copyright (c) 2019 Gabriel Ebner. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Gabriel Ebner, Sébastien Gouëzel -/ import analysis.calculus.fderiv import data.polynomial.derivative /-! # One-dimensional derivatives This file defines the derivative of a function...
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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.list.chain import category_theory.is_connected import category_theory.sigma.basic import category_theory.full_subcategory /-! # Connected components of a cat...