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# Questions

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396
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### Odd perfect numbers. What’s the best progess we now about them? [closed]

oct 31 11 at 14:08 GarouDan 314

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672
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### How to isolate $f(x)$ in $f(x+a)=f(x)+a\times g(x)$?

nov 2 11 at 2:54 Barry Cipra 3,2391818

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367
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### How to prove? Prime numbers. [closed]

nov 2 11 at 15:42 GarouDan 314

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1
475
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### Matrices. $XX^t=A$. $X=?$

nov 7 11 at 7:03 Brendan McKay 9,11111333

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224
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### Summing a function using modulus. [closed]

nov 28 11 at 16:32 GarouDan 314

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