David

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Name David
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417
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Family of subsets such that there are at most two sets containing two given elements

mar 30 12 at 13:53 gowers 17.8k●9●77●131

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7
votes
2
answers
582
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Number of x such that $m-x^2$ and $n-x^2$ are both squares

apr 28 12 at 10:08 joro 4,290●1●10●31

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4
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2
answers
236
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Conditions for an analogue of Cauchy-Davenport for simple groups

feb 20 12 at 0:47 quid 13.3k●33●54

 

 
1
vote
0
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125
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Pairs of numbers in columns of an increasing matrix

apr 2 12 at 2:07 David 207●1●2●6

 
0
votes
1
answer
187
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Solutions (a,b,c,d) to $a^2+b^2 = x$, $b^2+c^2 = y$, $c^2+d^2 = z$

may 7 12 at 4:33 David 207●1●2●6

 

1

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5
How to mentor an exceptional high school student?

 

73

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73

 

5

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