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Mathematics
John Bentin's user avatar
John Bentin's user avatar
John Bentin's user avatar
John Bentin
  • Member for 13 years, 11 months
  • Last seen this week
  • Oxford, United Kingdom
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131
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
32
When do two functions become equal?
Aug 19, 2015
31
What are usual notations for surjective, injective and bijective functions?
Jun 21, 2011
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
17
Why can't we order Complex Numbers?
May 15, 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?
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27
Is this a known question about the expression of a function on $\Bbb R^2$ as an infinite sum of products?
24
Can a unit square be cut into rectangles that tile a rectangle with irrational sides?
24
Is Cauchy induction used for proofs other than for AM–GM?
24
Suggestions for special lectures at next ICM
21
If a thousand people whisper inaudibly, will the resulting sound be audible?