Reputation
1,260
Top tag
Next privilege 2,000 Rep.
Edit questions and answers
Badges
2 7 21
Newest
 Yearling
Impact
~5k people reached

Aug
20
revised proof of log-sum giving maximum value given equality constraint
fix log and min
Aug
20
suggested approved edit on proof of log-sum giving maximum value given equality constraint
Aug
20
comment How to solve $\int \frac{\tan^{-1}x}{(1+x)^2}dx$?
And please, leave only question here, without any other solved examples...
Aug
20
comment How to solve $\int \frac{\tan^{-1}x}{(1+x)^2}dx$?
$\tan^{-1}(x)$ is an $\arctan(x)$, yes?
Aug
19
answered Evaluate $\int_2^4\frac{\sqrt{x^2-4}}{x^2}\mathrm dx$
Aug
19
answered Is there any simple analytic method for solving $\sqrt{x}+y=7$ and $x+\sqrt{y}=11$ simultaneously.
Aug
19
revised Is there any simple analytic method for solving $\sqrt{x}+y=7$ and $x+\sqrt{y}=11$ simultaneously.
improved formatting
Aug
19
suggested approved edit on Is there any simple analytic method for solving $\sqrt{x}+y=7$ and $x+\sqrt{y}=11$ simultaneously.
Aug
17
suggested rejected edit on Probability Distribution, where $E(X^2) = 2E(X)$
Aug
17
revised Relation between $\dim V$ and $\dim V^{\star}$
improved math formatting
Aug
17
suggested approved edit on Relation between $\dim V$ and $\dim V^{\star}$
Aug
17
answered How Matrix A is called $A^2=I$
Aug
17
comment How Matrix A is called $A^2=I$
Involutory matrix.
Aug
17
comment How Matrix A is called $A^2=I$
Equal to identity matrix? I know about nilpotent, idempotent and periodic matrices.
Aug
17
comment Calculus of variations: big-O notation?
Just replacement of terms smaller than $C^2$ with $O(C^2)$, assuming $C$ is small.
Aug
17
comment Calculus of variations: big-O notation?
You have particular question on something or overall explanation? For last, some calculus textbook would be better.
Aug
17
comment May seem like a noob question: really, why can't we divide by 0?
Maybe because it can be defined in many different ways and none of this definitions would be useful. Unlike $1+2+\cdots=-1/12$, where multiple definitions yields to the same result and have a practical results.
Aug
16
revised Finding $p'(0)$ for the polynomial of least degree which has a local maximum at $x=1$ and a local minimum at $x=3$
fixed formatting
Aug
16
suggested approved edit on Finding $p'(0)$ for the polynomial of least degree which has a local maximum at $x=1$ and a local minimum at $x=3$
Aug
16
revised A $n\cdot n$ square grid problem?
improved overall formatting