Phira

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8,527 reputation

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221 Answers

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37	True or false? $x^2\ne x\implies x\ne 1$
23	How can I sum the infinite series $\frac{1}{5} - \frac{1\cdot4}{5\cdot10} + \frac{1\cdot4\cdot7}{5\cdot10\cdot15} - \cdots\qquad$
22	The Mathematics of Tetris
22	Identity involving binomial coefficients
15	Is $\pi$ more transcendent than $e$?

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8,527 Reputation

+10	Convergence of $a_{n+1}=\frac{1}{1+a_n}$
+50	A probabilistic method
+5	Probability of finding 2012 before any other occurence of 012 in a random infinite sequence of digits 0,1,2
+10	True or false? $x^2\ne x\implies x\ne 1$

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5 Questions

votes activity newest

11	When do Pell equation results imply applicability of the “Vieta jumping”-method to a given conic?
7	Examples for existence proofs using the parity of fixed points of involutions
6	Links to interesting metaphors for problematic aspects of mathematics education
4	Probability of finding 2012 before any other occurence of 012 in a random infinite sequence of digits 0,1,2
2	What are good examples for functions that are semi-continuous but not left/right continuous and vice versa?

120 Tags

145 combinatorics × 56	45 binomial-coefficients × 10
81 sequences-and-series × 14	40 logic × 3
61 calculus × 16	34 abstract-algebra × 9
55 number-theory × 22	30 homework × 12
46 analysis × 8	30 probability × 9

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23 Accounts

$Mathematics$	Mathematics	8,527 rep	11241
	German Language and Usage	6,161 rep	1539
	Area 51	1,828 rep	221
	Physics	834 rep	112
	Philosophy	743 rep	214

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Yearling	Enlightened × 4
Revival × 8	combinatorics
Necromancer	Investor

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1,285 Votes Cast

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1,221	up		627	question		58		10
64	down		658	answer		58		10

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