Einar Rødland

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1,631 reputation

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27 Answers

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10	Solving functional equation $f(x)^2+f(y)^2=f(x+y)(f(f(x))+f(y))$
9	Find the terms of the sequence $a_{n+1}=1+n/a_n$ that are natural numbers
7	What type of object is a differential form?
6	What if the Euler Lagrange equation yields a 'trivial' answer
6	Rating system incorporating experience

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1,631 Reputation

+10	Sum inequality: $\sum_{k=1}^n \frac{\sin k}{k} \le \pi-1$
+10	An extension of the birthday problem
+10	graph that is a edge-disjoint union of trails of even length
+10	Inequality involving expectation

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38 Tags

13 differential-geometry × 4	9 elementary-number-theory
12 real-analysis × 3	7 combinatorics × 2
12 sequences-and-series × 2	6 probability × 4
12 calculus × 2	6 statistics
10 functional-equations	6 classical-mechanics

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4 Accounts

$Mathematics Stack Exchange$	Mathematics	1,631 rep	17
	Physics	126 rep	2
$TeX - LaTeX Stack Exchange$	TeX - LaTeX	111 rep	2
	Cross Validated	101 rep

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