Carolus

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40 Questions

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16	Why should a combinatorialist know category theory?
14	Solving the recurrence relation $a_n=\frac{a_{n-1}^2+a_{n-2}^2}{a_{n-1}+a_{n-2}}$
13	How do we prove $n^n \mid m^m \Rightarrow n \mid m$?
12	Asymptotic formula for $\sum_{n \le x} \frac{\varphi(n)}{n^2}$
11	Find all positive integers $n$ for which $(n-1)!+1$ is a power of $n$

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1,065 Reputation

+5	Solving the recurrence relation $a_n=\frac{a_{n-1}^2+a_{n-2}^2}{a_{n-1}+a_{n-2}}$
+20	Morphisms in a category with products
+5	Why should a combinatorialist know category theory?
+5	How do we prove $n^n \mid m^m \Rightarrow n \mid m$?

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2 Answers

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4	Two Identities on Number Theory
4	Should I write out stuff?

24 Tags

4 analytic-number-theory × 14	0 asymptotics × 5
4 number-theory × 9	0 abstract-algebra × 5
4 soft-question × 3	0 sequences-and-series × 5
4 learning	0 ring-theory × 4
0 elementary-number-theory × 8	0 category-theory × 3

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$Mathematics Stack Exchange$	Mathematics	1,065 rep	2421
	Area 51	151 rep	2
	Mathematica	101 rep	2

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