Michael Hardy

Minneapolis

After doing nearly all the coursework for a Ph.D. in math, I then did all the coursework for a Ph.D. in statistics and completed that degree.
26s
revised Second order differential equations where rhs $= 6e^2\cos(3x)$
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1m
revised Substitutions in Probability Generating Functions
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2m
revised What is $\max(\operatorname{Re} \{ \frac{x^* Ax}{x^* x}:0 \ne x \in C^n\} )$?
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7m
revised Does this sum converge, is my solution good?
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10m
revised How to prove the function $f$ has an antiderivative?
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1h
comment Proving that $\sum_{i=2}^n(5i-4)=\frac{n(5n-3)-2}{2}$ for all $n\geq 1$ by mathematical induction
@LuisGomezSanchez : I assume those mean "left-hand side" and "right-hand side".
1h
comment Limits and Trigonometry
I've immensely simplified the code. All the complications that have no effect on the appearance can only make editing more difficult.
1h
revised Limits and Trigonometry
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1h
revised Limits and Trigonometry
deleted 174 characters in body
1h
revised Limits and Trigonometry
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1h
revised Limits and Trigonometry
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1h
comment Limits and Trigonometry
One seldom sees MathJax code written as badly as this. Obviously it was done by one of those softwares that writes the code for you. If an actual human wrote code like this, I'd diagnose him as psychotic.
1h
comment Proving that $\sum_{i=2}^n(5i-4)=\frac{n(5n-3)-2}{2}$ for all $n\geq 1$ by mathematical induction
I'm not convinced this doesn't work when $n=1$. When $n=1$, then the fraction on the right is $0$, and the number of terms on the left is $0$. ${}\qquad{}$
1h
revised Proving that $\sum_{i=2}^n(5i-4)=\frac{n(5n-3)-2}{2}$ for all $n\geq 1$ by mathematical induction
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1h
revised For what values of $x\in \Bbb N$ is $\tan^{-1}\left(\frac{360}{x}\right)$ rational?
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1h
revised for which values of $\theta$ does this equation $x^{\cos\theta} +y^{\sin\theta }=1$ have solutions in integers .?
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1h
revised Probability of being between two independent Gaussian random variables
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2h
revised If $D$ from $X*X $ to $R$ with this condition that $ D(x,y)=-D(y,x)$, and if $ D(x,y)\ge0$, $D(y,z)\ge0$, can we implies that $D(x,z)\ge0$?
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2h
revised Fourier transform of this?
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2h
revised Quantum mechanics question?
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