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Barry Cipra's user avatar
Barry Cipra's user avatar
Barry Cipra
  • Member for 13 years, 6 months
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Author of Misteaks, and how to find them before the teacher does (a calculus supplement).

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70
How to write popular mathematics well?
Dec 21, 2011
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34
Gaussian prime spirals
Mar 18, 2012
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27
Is "Notices of the American Mathematical Society" available before 1995?
Nov 13, 2012
answer
26
What are some examples of ingenious, unexpected constructions?
Mar 12, 2012
answer
24
History of the high-dimensional volume paradox
Apr 26, 2013
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21
Non-enumerative proof that there are many derangements?
Jan 19, 2012
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21
Sums of Squares
Mar 14, 2013
answer
18
Billiard dynamics under gravity
Aug 1, 2011
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18
A "couple" of questions on Gauss's mathematical diary
Jan 26, 2012
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17
How many sequences of rational squares are there, all of whose differences are also rational squares?
Aug 4, 2011
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169
Why does L'Hopital's rule fail in calculating $\lim_{x \to \infty} \frac{x}{x+\sin(x)}$?
114
How do people perform mental arithmetic for complicated expressions? (In particular, $\frac{10^2+11^2+12^2+13^2+14^2}{365}$)
104
Hanging a picture on the wall using two nails in such a way that removing any nail makes the picture fall down
89
Identification of a quadrilateral as a trapezoid, rectangle, or square
71
Is there a "positive" definition for irrational numbers?