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Mathematics
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Malkin
  • Member for 9 years
  • Last seen more than a week ago
  • Bristol, United Kingdom
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Maths grad and secondary school maths teacher.

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25
Upside-down equation: algebra puzzle
Dec 19, 2018
15
Definitions of analytic, regular, holomorphic, differentiable, conformal: what implies what and do any imply that a function is a bijection?
Aug 7, 2018
12
Is there a special name for primes $p = 2^n+1$ and what is the largest known to date?
Aug 10, 2018
9
Show $\frac{\sin20^\circ\sin30^\circ\tan40^\circ}{\sin20^\circ\sin30^\circ+\tan40^\circ\sin50^\circ} =\tan10^\circ$
May 16, 2021
8
Does $\tan (x)$ equal $\frac{-1}{x-\frac{\pi}{2}}+\frac{-1}{x+\frac{\pi}{2}}+\frac{-1}{x-\frac{3\pi}{2}}+\frac{-1}{x+\frac{3\pi}{2}}+...$?
Jul 4, 2015
6
Do angle properties (e.g. interior angles of a triangle sum to $\pi$) hold in general inner product spaces?
Apr 14, 2017
5
How many zeros does $x^2 + y^2 \pmod d$ have on $[0, d-1]^2$?
Nov 28, 2020
5
What surface forms when you glue opposite sides of a rectangle together, introducing a half twist for both gluings?
Aug 16, 2018
5
Find real number $a$ such that matrix $A$ is NOT diagonalisable
Aug 7, 2018
4
Shadow cast by a wall; coordinate geometry/ calculus problem
Jul 24, 2018