SheafofThoughts
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How many primes are there?
Fermat's Christmas Theorem
Divulgation
In the previous post we asked some questions about prime numbers such as:
Dec 8, 2025
Ax–Grothendieck Theorem
Advanced Topics
Algebraic Geometry
We all know from basic linear algebra that injective endomorphisms of a finite-dimensional vector space are also surjective. The same holds for finite sets. Over…
Dec 7, 2025
Introduction
Fermat's Christmas Theorem
Divulgation
On Christmas day (25 December 1640), Pierre de Fermat wrote a letter to Marin Mersenne where he stated that every prime number of the form
\(4n+1\)
could be written as the…
Nov 29, 2025
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