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Results tagged with reference-request
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user 44293
This tag is used if a reference is needed in a paper or textbook on a specific result.
8
votes
2
answers
527
views
Integer numbers of the form $m = x^n + y^n$
First of all, I am no number theorist, so this question may be a little dummy.
The two squares theorem imply that $m = x^2 + y^2$ for some (possible zero) integer numbers $x,y$ iff $m$ factors as $m = …
- 800
33
votes
Proofs without words
I am surprised that no one had cited the "proof" that the rationals are countable yet. See, for example, this picture