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11.3.15 says `Suppose f : Q → R is Lipschitz, then there exists f' : R -> R Lipschitz such that forall q, f'(rat q) = f q`, but then in the proof it says `for q : Q define f'(rat q) = rat (f q)`, ie u…
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# Why? 😕
Being proficient at mathematics is one of the single best _predictors_ of "success"1 in life.
# What? 💭 🔢
A repository for us to collect links to good math tutorials, puzzles, insi…
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According to the Google group discussion https://groups.google.com/d/msg/metamath/XKl7K0qx4uc/hRykryMhDgAJ (see also issue #866), the currently used abbreviation "rng" for a unital ring `Ring` should …
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Test case (pdflatex):
```
\documentclass{article}
\usepackage{fancyhdr}
\pagestyle{fancy}
\usepackage{hyperref}
\newtheorem{thm}{Theorem}
\textheight60pt
\begin{document}
1\\2\\3\\4\\5\\6
…
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https://github.com/coq-community/corn/blob/af4b86e6ad6cfd242562f9c33c0e438298fc4e1f/coq_reals/Rreals_iso.v#L261
While trying to translate between Coquelicot and corn's complex numbers, I noticed t…
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```agda
{-# OPTIONS --rewriting #-}
open import Relation.Binary.PropositionalEquality
{-# BUILTIN REWRITE _≡_ #-}
postulate
A B : Set
module Rewr where
postulate
q : A ≡ B
…
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In [this comment](https://github.com/pi-base/data/pull/547#issuecomment-1920580779) @marswill suggested introducing the notion of "totally arc disconnected", as it would allow to unify some theorems r…
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In the compiler (#59) we had to generalize the relation for `Ret` in `eutt` to be a parameter (also we opted to make it heterogeneous). This gave us additional flexibility in stating theorems that see…
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Let's integrate the unification of each step as "low-hanging fruits" on the "lattice of the Tree of Knowledge" in the "Garden of Eden," where "genetic algorithms mutate ideas." This will symbolize the…
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Some comments for you and Jocelyn to discuss.
S154/P187: "non-trivial sequence" is not clear and seemingly not right. You probably meant a sequence of all distinct elements instead.
T473: "Asser…