User Casteels - Mathematics Meta Stack Exchange

Casteels

Member for 10 years
Last seen more than 3 years ago

math.ucsb.edu/~casteels
Santa Barbara, CA

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May 18, 2015
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97

Express 99 2/3% as a fraction? No calculator

54

Proof that $2^{222}-1$ is divisible by 3

44

What should I ask deans during my interview?

27

Rational + irrational = always irrational?

24

when is $n!+10$ a perfect square?