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Henri Cohen's user avatar
Henri Cohen's user avatar
Henri Cohen
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51
Closed formula for a certain infinite series
Aug 8, 2021
28
Infinitely many integer solutions to $X^4+Y^4-18Z^4= -16$
Apr 8, 2018
26
Sets of algebraic integers whose differences are units
Jun 27, 2024
25
Show that these matrices are invertible for all $p>3$
Mar 10, 2022
24
Analogue of Fermat's "little" theorem
Jun 14, 2022
23
wrong formula for Atkin--Lehner operators?
Mar 23, 2018
23
Derivation of certain sums "the hard way"
Oct 8, 2017
22
Hadamard factorization of L-functions
Aug 30, 2020
22
Possible new series for $\pi$
Jun 26, 2024
20
Why is fast matrix multiplication impractical?
Apr 28, 2022