Phira

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12,169 reputation

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visits	member for	2 years, 1 month
	seen	May 1 at 18:04
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327 Answers

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51	True or false? $x^2\ne x\implies x\ne 1$
34	“How long 'til we get there?” Road trip puzzle
23	Identity for convolution of central binomial coefficients
22	The Mathematics of Tetris
22	How can I sum the infinite series $\frac{1}{5} - \frac{1\cdot4}{5\cdot10} + \frac{1\cdot4\cdot7}{5\cdot10\cdot15} - \cdots\qquad$

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12,169 Reputation

+10	True or false? $x^2\ne x\implies x\ne 1$
+10	What does the notation n* mean?
+10	Confidence level in answer being correct when multiple people give that same answer
+10	The Mathematics of Tetris

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9 Questions

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11	When do Pell equation results imply applicability of the “Vieta jumping”-method to a given conic?
6	Estimate variance given a sample of size one (7th Kolmogorov Student Olympiad)
6	Examples for existence proofs using the parity of fixed points of involutions
5	Generators of the multiplicative group modulo $2^k$
5	Links to interesting metaphors for problematic aspects of mathematics education

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162 Tags

182 combinatorics × 71	63 abstract-algebra × 15
115 calculus × 23	54 homework × 20
90 sequences-and-series × 19	54 logic × 3
70 number-theory × 27	49 real-analysis × 13
64 binomial-coefficients × 14	44 analysis × 9

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29 Accounts

$Mathematics Stack Exchange$	Mathematics	12,169 rep	12065
	German Language & Usage	6,990 rep	1748
	Area 51	2,044 rep	223
	Physics	934 rep	215
	Philosophy	833 rep	314

42 Badges

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Nice Answer × 20	Proofreader
Yearling × 2	Altruist
Revival × 11	Excavator
Custodian × 7	calculus
Necromancer × 2	Good Answer × 2

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