7h
revised A good book on convolutional neural networks
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9h
revised Is coloring equations good practice or bad?
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17h
revised $7^{6} | (a+b+ab)^2$ Find the value of $a,b$
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17h
revised How can I make sense of this basic algebraic manipulation backwards?
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20h
revised Show that two rings are not isomorphic
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20h
revised Best and worst tags for % answered rate
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20h
comment $\int \frac{1}{\sqrt{x^2+1}} dx$
Please do not use titles consisting only of math expressions; these are discouraged for technical reasons -- see meta.
1d
answered Dual of $l^\infty$ is not $l^1$
1d
revised Induction to prove that for any $r \in \mathbb{R}$ such tht $r \notin (0,1)$ $\sum_{i=1}^n r^i-1 = \frac{(1-r^n)}{1-r}$ for all $n \in \mathbb{N}$.
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1d
revised continuous linear functional on $l^{\infty}$ space
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1d
revised Given two column vectors $a$ and $b$, what is the determinant of $A$ if $A=Id-ab^T$
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1d
comment Given two column vectors $a$ and $b$, what is the determinant of $A$ if $A=Id-ab^T$
Wikipedia: Matrix determinant lemma
1d
revised Given two column vectors $a$ and $b$, what is the determinant of $A$ if $A=Id-ab^T$
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1d
comment Developping $\ln(x)$ in power series in $1$
Your question was put on hold, the message above (and possibly comments) should give an explanation why. (In particular, this link might be useful.) You might try to edit your question to address these issues. Note that the next edit puts your post in the review queue, where users can vote to reopen this. (Therefore it would be good to avoid minor edits and improve your question as much as possible with the next edit.)
1d
comment Ratio test for sequences, the other direction
You wrote $u_{2n}$ twice. I guess one of them is supposed to be $u_{2n+1}$. (Also $\infty!$ at the end of your post looks like infinity factorial. But that is probably nitpicking.)
1d
revised Ratio test for sequences, the other direction
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1d
comment Creating Lists on this site for reference as an on going project
Have a look at answers to List of inequalities including proofs. In particular, notice thatthere already exists something similar: Catalog of standard exercises.
1d
revised If A and B are ideals of a ring, show that A + B = $\{a+b|a \in A, b \in B\}$ is an ideal
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1d
revised Show that $I + J = \{a + b\vert a \in I, b \in J\}$ is an ideal of R.
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1d
revised Subjective behavior regarding to which question are immediately closed
link to a question rather than to a comment
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