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Difference between let and have keywords in lean 4...


lean

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Mathlib keeps rebuilding even after I `lake exe cache get`...


leanmathliblake

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Lean4 Coercion between Nat/ Fin3/Fin9 with simp tactic pass the proof of 0=2...


coercionlean

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How to Construct a Term Proof for an Existential (moved to -- 'Proof Assistants Beta')...


proofexistential-typeleanconstruction

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Lean 4: Agda user struggling to understand Lean's equality type, type mismatch, not reducing...


functional-programmingtheorem-provingformal-verificationleantype-theory

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Lean4 lambda calculus DSL macro...


parsingdsllambda-calculustheorem-provinglean

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How to use the summation sign in lean?...


syntaxlibrarieslean

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while_true_nonterm in Lean4...


rocq-provertheorem-provinglean

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Negation as a Conclusion from And.Intro and Or.Elim...


negationlean

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Categories in Lean4...


categorieslean

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Lean4 string interpolation: Possible to format as hex?...


string-interpolationlean

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Composing dependent functions in Lean...


dependent-typelean

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Associated types in Lean...


typeclassassociated-typeslean

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LEAN 4: Apparent Contradiction re Arguments that may be referenced by 'match'...


syntaxpolymorphismpattern-matchinglean

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Why does this typecheck in Lean?...


lean

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Non-empty list examples from "Functional Programming in Lean" produce error: unsolved goal...


lean

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Simple dependent type example in lean4...


functional-programminglean

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How to prove mathematical induction formulae in LEAN theorem prover?...


theorem-provinglean

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How to define mutual inductive propositions in Lean?...


dependent-typetheorem-provingmutual-recursionlean

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How to include special characters like ≅ into "UnexpandM Syntax" syntax quotations?...


lean

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Creating a macro/elab which converts a new identifier into two existing identifiers...


lean

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confusion over meaning of underscore `_` in simple Lean example...


lean

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How to define free monads and cofree comonads in Lean4?...


haskellmonadscategory-theoryleancomonad

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Use obtain in tactic mode in Lean theorem prover...


lean

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Output of #check Nat.add...


lean

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How to change current working directory in Lean 4?...


lean

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How to do function composition in Lean 4?...


functional-programmingfunction-compositionlean

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In Lean is there automatic detection of nearly identical definitions?...


lean

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How to prove a = b → a + 1 = b + 1 in lean?...


dependent-typeformal-verificationlean

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Leverage theorem in the reals for the natural numbers...


lean

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