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Noam D. Elkies's user avatar
Noam D. Elkies's user avatar
Noam D. Elkies
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257
Should the formula for the inverse of a 2x2 matrix be obvious?
Feb 21, 2012
142
Source and context of $\frac{22}{7} - \pi = \int_0^1 (x-x^2)^4 dx/(1+x^2)$?
Jun 9, 2011
104
Tweetable Mathematics
Apr 27, 2017
91
Inverting lower triangular matrix in time $n^2$
Nov 23, 2020
85
Tweetable Mathematics
Apr 26, 2017
79
Does Zhang's theorem generalize to $3$ or more primes in an interval of fixed length?
Jun 4, 2013
70
How good is Kamenetsky's formula for the number of digits in n-factorial?
Aug 26, 2011
66
There's something strange about $\sqrt{\big(j(\tau)-1728\big)d}$
Jan 16, 2014
65
Absolute value inequality for complex numbers
May 21, 2014
63
Prominent non-mathematical work of mathematicians
Aug 20, 2020
Top Meta posts
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Why has the question "Optical methods for number theory?" been closed?
8
Interpretation of Time-limit for Editing Comments
6
Can a person other than the author start a bounty for a question they like?
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76
Does $\sum _{n=1}^{\infty } \frac{\sin(\text{ln}(n))}{n}$ converge?
76
Prove that if V is finite dimensional then V is even dimensional?
55
A conjectural closed form for $\sum\limits_{n=0}^\infty\frac{n!\,(2n)!}{(3n+2)!}$
38
Simplest or nicest proof that $1+x \le e^x$
38
Is there a way to write an infinite set that contains only irrational numbers without integer multiples?