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Alexey Ustinov
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Solving hard problems by easy methods

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53
Most intriguing mathematical epigraphs
Sep 29, 2015
50
Rediscovery of lost mathematics
Jun 28, 2017
43
Examples of unexpected mathematical images
Nov 12, 2016
41
'Important' applications of p-adic numbers outside of algebra (and number theory).
Oct 29, 2013
40
Is there a regular pentagon with a rational point on each edge?
Nov 25, 2023
38
Rediscovery of lost mathematics
Apr 12, 2015
35
Solve in positive integers: $n!=m(m+1)$
Sep 18, 2010
35
"The Two Sheriffs" puzzle
Apr 17, 2015
33
Applications of finite continued fractions
Dec 19, 2010
25
The origin of Discrete `Liouville's theorem'
Nov 22, 2013
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Two Sheriffs and Eavesdroppers - 2
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Is there a cryptographic solution for this “dating protocol”?
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How hard is Self-DLOG?
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Fundamental unit in the ring of integers $\mathbb Z[\frac{1+\sqrt{141}}{2}]$