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Mathematics
Dr Xorile's user avatar
Dr Xorile's user avatar
Dr Xorile's user avatar
Dr Xorile
  • Member for 9 years, 4 months
  • Last seen more than a month ago
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About

I'm a South African/Brit living in Southern California with my wife and three kids. I have studied mathematics and have a PhD in physics. My kids were born in the UK and Singapore. I run Ubuntu at home, and enjoy puzzles. I like python and board games and rock climbing and outdoors generally. I write about science and religion and work in consulting.

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23
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Top posts
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17
Quick solution of an equation in factorials
Nov 16, 2016
13
Proof that every positive integer has at most one prime factor greater than its square root?
Aug 24, 2015
6
Uses of Ramsey Theory in Astronomy?
Jan 26, 2016
5
SAT math problem about probability
May 31, 2015
4
Is there a formula to find every number divisible by $7$ but not $2,3$,or $5$? Not counting numbers but looking for specific solutions.
Sep 11, 2015
3
Changing-sided dice probability problem.
May 31, 2015
3
Smallest graph that cannot be represented by the intersection graph of axis-aligned rectangles
Nov 18, 2016
3
How many ways are there to arrange 4n people around a square table if the 4 cyclic shifts around the table constitute the same seating?
Oct 14, 2015
3
This expression is always a perfect square
Jul 30, 2015
2
Summation of special series
Jun 30, 2015
Top network posts
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177
How can 64 = 65?
86
Three logicians walk out of the bar
49
Reverse Puzzling
44
Chess : The Lone King
42
How do you get 23 using the numbers 1, 2, 3 and 5?