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Eric Fisher

I did philosophy and comparative literature at Princeton, international relations at Johns Hopkins, and economics at Berkeley. But my true love is math.

I've published in economics, political science, and computational physics.

I am a Christian and a Freemason.

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  • San Luis Obispo, CA, United States
  • Member for 3 years, 6 months
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  • Last seen Mar 27 '18 at 3:29

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6 Let $x \in \mathbb{R}$ and assume that for all $\epsilon > 0, |x| < \epsilon$. Prove: $x = 0$ Sep 16 '17
5 A game consists of tossing a fair die. A player wins if the number is even and loses if the number is odd. Sep 19 '17
5 Prove diagonal entries of positive definite matrices cannot be smaller than the eigenvalues Dec 6 '17
4 Simplification of series Nov 14 '17
3 Using the natural homomorphism $\mathbb Z$ to $\mathbb Z_5$ Dec 6 '17
3 Is the time-dependent matrix invertible? Dec 14 '17
3 Improper integral of p and f Dec 14 '17
2 square root of covariance of two variables Dec 16 '17
2 Prove $\mathrm{ext}\,(A)=\mathrm{int}\,(X\setminus A)$ Nov 7 '17
2 Prove that if $A$ has a maximum, then the maximum must be the supremum Dec 12 '17
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