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Mathematics
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Alex
  • Member for 6 years, 6 months
  • Last seen more than 2 years ago
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4
Computing the binomial sum $\sum_{0\le i<j\le n}j\binom ni$
Apr 6, 2020
4
Integration twist
Jul 31, 2020
4
2n ambassador problem
Aug 20, 2021
3
3D geometry-skew lines, distance of a point from a line
Dec 4, 2019
3
Volume of a weird shape
Mar 29, 2020
3
Number of ways to fill 4 cells in a $4 \times 4$ array under constraints
Apr 6, 2020
3
Prove that there exists infinitely many prime numbers of the form 4k+3 for some integer k.
Aug 20, 2021
2
Circular arrangement with consecutive numbers
Feb 6, 2020
2
How to convert an informal proof to something formal?
Sep 4, 2021
1
Vectors angle between two lines
Jan 6, 2020