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1h
revised Taking derivative of $\log \det[x(I - y H)^{-1} + z I] \text{ w.r.t. }x, y, z$
edited title
1h
revised Decribe the set ? List or word
deleted 20 characters in body
1h
comment What is the use of the double modulus signs.
Notice this code: \|\cdot\|. The difference between ||a|| and \|a\| is perhaps most conspicuous when you see the difference in rendering between ||a||||b|| and \|a\|\|b\|, thus: $||a||||b||$ versus $\|a\|\|b\|$. I edited accordingly. ${}\qquad{}$
2h
revised What is the use of the double modulus signs.
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2h
revised Second order differential equations where rhs $= 6e^2\cos(3x)$
added 6 characters in body; edited title
2h
revised Substitutions in Probability Generating Functions
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2h
revised What is $\max(\operatorname{Re} \{ \frac{x^* Ax}{x^* x}:0 \ne x \in C^n\} )$?
added 5 characters in body; edited title
2h
revised Does this sum converge, is my solution good?
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2h
revised How to prove the function $f$ has an antiderivative?
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3h
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".
3h
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.
3h
revised Limits and Trigonometry
deleted 174 characters in body
3h
revised Limits and Trigonometry
deleted 174 characters in body
3h
revised Limits and Trigonometry
deleted 174 characters in body
3h
revised Limits and Trigonometry
deleted 174 characters in body
4h
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.
4h
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 $0$. ${}\qquad{}$
4h
revised Proving that $\sum_{i=2}^n(5i-4)=\frac{n(5n-3)-2}{2}$ for all $n\geq 1$ by mathematical induction
edited body; edited title
4h
revised For what values of $x\in \Bbb N$ is $\tan^{-1}\left(\frac{360}{x}\right)$ rational?
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4h
revised for which values of $\theta$ does this equation $x^{\cos\theta} +y^{\sin\theta }=1$ have solutions in integers .?
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