Mathematics
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David P

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48 An example of a problem which is difficult but is made easier when a diagram is drawn Jan 11 '15
19 What is the volume of the $3$-dimensional elliptope? Oct 16 '16
16 Probability that a 5 occurs first Oct 8 '18
16 Prove: The pre-image of an ideal is an ideal. Feb 28 '14
11 Should I be afraid of using known identities that I can't prove? Oct 9 '14
11 Prove that determinant complex conjugate is complex conjugate of determinant Nov 30 '14
10 Is there an online calculator in which you can type a number and have it tell you if it could be a Lychrel number or not? Dec 27 '14
10 Probability that 2 appears at an earlier position than any other even number in a permutation of 1-20 Feb 8 '14
9 What is good chalk for lecturing? May 23 '13
8 If $(m,n)\in\mathbb Z_+^2$ satisfies $3m^2+m = 4n^2+n$ then $(m-n)$ is a perfect square. Feb 18 '14
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