Vafa Khalighi

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804 reputation

211

bio	website
	location	Shiraz, Iran
	age
visits	member for	2 years, 3 months
	seen	Nov 24 '11 at 11:00
stats	profile views	407

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30 Questions

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11	How to express $(1+x+x^2+\cdots+x^m)^n$ as a power series?
10	Working out a Group Presentation
8	Proofs of the Cauchy-Schwarz Inequality?
8	Partial fraction of $\frac{x^n}{(1-x)(1-2x)(1-3x)\ldots(1-nx)}$
6	Is any transposition a product of simple transpositions?

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804 Reputation

+5	The general argument to prove a set is closed/open
+5	Isomorphic groups
+5	subgroup of $\mathbf{Z}_9$ generated by $8$
+5	Textbook on “Generating Functions”

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7 Answers

votes activity newest

7	Prove inequality: When $n > 2$, $n! < {\left(\frac{n+2}{\sqrt{6}}\right)}^n$
4	Why does $a_n = (1+\frac{2}{n})^{n}$ converge to $e^2$?
2	Find the value of 'x' in a product of exponentiated logarithms
2	Exponential Summation
1	Non-associative, non-commutative binary operation with a identity

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23 Tags

7 inequality × 7	1 integral
5 calculus × 2	0 group-theory × 15
4 sequences-and-series × 4	0 real-analysis × 9
2 algebra-precalculus × 2	0 homework × 6
1 abstract-algebra × 11	0 big-list × 2

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3 Accounts

$TeX - LaTeX Stack Exchange$	TeX - LaTeX	1,726 rep	411
$Mathematics Stack Exchange$	Mathematics	804 rep	211
	Ask Ubuntu	101 rep

9 Badges

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Yearling × 2	Editor
Popular Question × 3	Scholar
Nice Question × 2	Supporter
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