dingc - Network

Why does the following lean code not work?variable (p q r : Prop)example : (p ∨ q) ∨ r ↔ p ∨ (q ∨ r) := Iff.intro (fun...

Why does the following lean code not work?

variable (p q r : Prop)
example : (p ∨ q) ∨ r ↔ p ∨ (q ∨ r) :=
Iff.intro
(fun ⟨⟨hp, hq⟩, hr⟩ => ⟨hp, ⟨hq, hr⟩⟩)
(fun ⟨hp, ⟨hq, hr⟩⟩ => ⟨⟨hp, hq⟩, hr⟩)

More facts about the resultant over a UFDhttps://functor.network/user/2593/entry/1083

More facts about the resultant over a UFD
https://functor.network/user/2593/entry/1083

Classic results on homogeneous polynomialshttps://functor.network/user/2593/entry/1076

Classic results on homogeneous polynomials
https://functor.network/user/2593/entry/1076

Some fun with Euler’s identityhttps://functor.network/user/2982/entry/1064

Some fun with Euler’s identity
https://functor.network/user/2982/entry/1064

Notes on Holevo’s Theoremhttps://functor.network/user/2982/entry/1064

Notes on Holevo’s Theorem
https://functor.network/user/2982/entry/1064

Computing the prime ideals in the ring of polynomials with integer coefficientshttps://functor.network/user/2593/entry/1061

Computing the prime ideals in the ring of polynomials with integer coefficients
https://functor.network/user/2593/entry/1061

Two rules, same function; two functions, same rulehttps://functor.network/user/2473/entry/1055

Two rules, same function; two functions, same rule
https://functor.network/user/2473/entry/1055

Equivalence Between Almost Uniform Convergence and $\varepsilon_n$-Level Set Decayhttps://functor.network/user/2628/entry/1050

Equivalence Between Almost Uniform Convergence and $\varepsilon_n$-Level Set Decay
https://functor.network/user/2628/entry/1050

Relative primality of polynomials over a UFD is preserved over the fraction fieldhttps://functor.network/user/2593/entry/1047

Relative primality of polynomials over a UFD is preserved over the fraction field
https://functor.network/user/2593/entry/1047

Some notes on relative primalityhttps://functor.network/user/2593/entry/1045

Some notes on relative primality
https://functor.network/user/2593/entry/1045

Ideal-theoretic characterization of irreducibilityhttps://functor.network/user/2593/entry/1043

Ideal-theoretic characterization of irreducibility
https://functor.network/user/2593/entry/1043

Computing the prime ideals in the ring of complex polynomials in two variableshttps://functor.network/user/2593/entry/1041

Computing the prime ideals in the ring of complex polynomials in two variables
https://functor.network/user/2593/entry/1041

Next-Word Prediction, Good-Turing Estimation, and Expectations of Sumshttps://functor.network/user/2906/entry/994

Next-Word Prediction, Good-Turing Estimation, and Expectations of Sums
https://functor.network/user/2906/entry/994

linear regression from scratchhttps://functor.network/user/2964/entry/1039

linear regression from scratch
https://functor.network/user/2964/entry/1039

Examples of funny a priori analytic knowledgehttps://functor.network/user/2593/entry/1037

Examples of funny a priori analytic knowledge
https://functor.network/user/2593/entry/1037

Algèbre linéaire :Une notation plus explicite pour les matrices de passagehttps://functor.network/user/1333/entry/1034

Algèbre linéaire :Une notation plus explicite pour les matrices de passage
https://functor.network/user/1333/entry/1034

Revisiting the infinitude of primeshttps://functor.network/user/2593/entry/1032

Revisiting the infinitude of primes
https://functor.network/user/2593/entry/1032

small attack on lwehttps://functor.network/user/2029/entry/996

small attack on lwe
https://functor.network/user/2029/entry/996

Minimal polynomial, naturallyhttps://functor.network/user/2593/entry/1029

Minimal polynomial, naturally
https://functor.network/user/2593/entry/1029

A minor observation about conditionals and logical equivalencehttps://functor.network/user/2473/entry/1011

A minor observation about conditionals and logical equivalence
https://functor.network/user/2473/entry/1011