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Mathematics
John Bentin's user avatar
John Bentin's user avatar
John Bentin's user avatar
John Bentin
  • Member for 15 years, 4 months
  • Last seen this week
  • Oxford, United Kingdom
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133
Why is the Penrose triangle "impossible"?
Jul 2, 2020
74
Find $xy+yz+zx$ given systems of three homogenous quadratic equations for $x, y, z$
Feb 9, 2018
36
How few disks are needed to cover a square efficiently?
Aug 14, 2018
35
To sum $1+2+3+\cdots$ to $-\frac1{12}$
Sep 8, 2012
33
When do two functions become equal?
Aug 19, 2015
32
What are usual notations for surjective, injective and bijective functions?
Jun 21, 2011
32
Is sudoku only one puzzle?
Aug 20, 2024
26
"a Euler graph" or "an Euler graph"?
Jul 4, 2023
25
Theorems' names that don't credit the right people
Jun 3, 2013
23
What are some surprising appearances of $e$?
Feb 8, 2016

Top Meta posts

34
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64
A plea to consider "unclear" questions.
32
Demotivating test reviews
22
An unsatisfying editing experience
17
Is it OK to roll back stylistic editing on one's own post?
17
How long should one wait before cross-posting?

Top network posts

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28
Is this a known question about the expression of a function on $\Bbb R^2$ as an infinite sum of products?
25
Is Cauchy induction used for proofs other than for AM–GM?
25
Suggestions for special lectures at next ICM
24
Can a unit square be cut into rectangles that tile a rectangle with irrational sides?
21
If a thousand people whisper inaudibly, will the resulting sound be audible?