36

Questions
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10
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1
answer
184
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Fano plane drawings: embedding PG(2,2) into the real plane

may 15 at 1:41 Douglas Zare 13.5k●3●36●59

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10
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1
answer
526
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A delicate elementary inequality

dec 3 at 15:38 Seva 5,073●1●8●27

 
8
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2
answers
266
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An expander (?) graph

mar 16 at 18:42 Alain Valette 6,469●14●26

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1
answer
250
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An isoperimetric problem on the hypercube

sep 22 11 at 9:00 Boris Bukh 3,040●9●26

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1
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602
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Projecting the unit cube onto a (very special) subspace

jul 10 11 at 16:15 Seva 5,073●1●8●27

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534
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When does $P(a−b)=0$ for $a≠b$ ensure $P(0)=0$? (Continued.)

apr 20 11 at 14:22 MathOverflow♦ 1●2●3

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8
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3
answers
771
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The largest eigenvalue of a “hyperbolic” matrix

oct 23 10 at 15:13 Qiaochu Yuan 38.8k●5●117●306

 
7
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2
answers
389
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A hypercube-related graph

oct 28 11 at 4:21 Zack Wolske 1,114●2●9

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7
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1
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272
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When does $P(a-b)=0$ for $a\ne b$ ensure $P(0)=0$?

feb 7 11 at 11:08 Kevin Ventullo 3,224●10●20

2
7
votes
3
answers
454
views

The digit sum: $s(na)=s(nb)$

jun 17 12 at 19:16 Goldstern 5,310●1●12●27

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