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Mathematics
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pi66
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30
Suppose $M$ is an $m \times n$ matrix such that all rows and columns of $M$ sum to $1$. Show that $m=n$
Sep 6, 2016
28
Prove $|P(0)|\leq 2n+1$
Feb 1, 2016
27
Parts with the maximum number of each integer
Apr 14, 2017
26
Is there a simple function that generates the series; $1,1,2,1,1,2,1,1,2...$ or $-1,-1,1,-1,-1,1...$
Aug 21, 2016
18
Partition of 4-tuples
Aug 2, 2018
16
Sum of roots rational but product irrational
Jul 21, 2016
15
Tic-tac-toe with one mark type
Jul 24, 2020
14
Dividing books between two couples
May 4, 2016
14
Function of two sets
Sep 28, 2020
13
very basic question about coordinate geometry
Aug 24, 2016
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18
Function of two sets intersection
18
Tic-tac-toe with one mark type
10
Disjoint sets with twice ratio
9
Maximize sum of products of binary variable
8
Partition of 4-tuples