An illustration of a paradox about the idoneal, or suitable, numbers
Abstract
In this paper Euler shows that there are no additional square idoneal numbers aside from 1, 4, 9, 16, and 25.
0
Turn this paper into a full lesson
ArcXiv compiles a staged curriculum from this paper: 8-12 lessons across beginner → advanced, synthesised section guides, visuals, flashcards, a quiz, exercises, and on-demand deep dives per section. Grounded in the abstract, never invented.