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22h
comment Obfuscated proofs
Somewhat similar question on MathOverflow: mathoverflow.net/questions/42512/…
May
26
revised Why imaginary numbers axis is plotted perpendicular to the real numbers axis?
edited tags
May
24
comment Square & square root
gallery.carnegiefoundation.org/gallery_of_tl/collections/…
May
24
revised How to plot a phase portrait for system of differential equations in mathematica or R?
edited tags
May
24
comment Calculating $\int_0^\pi \frac{1}{a+b\sin^2(x)} dx $
@Christian: Yes, of course it should be $\pi$. That was a contamination from all the other square roots... Anyway, I've fixed it now.
May
24
revised Calculating $\int_0^\pi \frac{1}{a+b\sin^2(x)} dx $
Corrected another typo.
May
24
comment Different methods to compute $\sum\limits_{n=1}^\infty \frac{1}{n^2}$
@VividD: Feel free to try, I'm not going to stop you! ;-)
May
24
revised Calculating $\int_0^\pi \frac{1}{a+b\sin^2(x)} dx $
Fixed a typo, added more details, and moved a comment into the answer.
May
24
answered Calculating $\int_0^\pi \frac{1}{a+b\sin^2(x)} dx $
May
21
revised Coordinate vectors
edited tags
May
20
comment Solving the integral $\int_{0}^{\infty} \frac{\sin{x}}{x} \ dx = \frac{\pi}{2}$?
@LucasSilva: Robin hasn't been active on this site for several years (unfortunately).
May
20
comment How to prove no integer roots for this Polynomial?
@DanielFischer: Are you thinking of this one: math.stackexchange.com/questions/680102/…?
May
20
comment Relation between Noether's one-sided ideals and Polish notation?
What a strange question...
May
20
comment What's wrong with l'Hopital's rule?
Another related meta question.
May
19
revised Deciding when to use $\mu^2$ or $-\mu^2$ in separation of variable (PDE'S)
Corrected mistake (the cases with > and < were switched).
May
19
answered Deciding when to use $\mu^2$ or $-\mu^2$ in separation of variable (PDE'S)
May
14
comment Is an irrational number odd or even?
@ChrisDrost: When and only when. :-)
May
14
answered Multivariable limit which should be simple !
May
14
comment Can we still learn from the old masters?
By the way, here's a similar question: math.stackexchange.com/questions/157789/historic-literature
May
14
comment Can we still learn from the old masters?
There is a joke that much of computer graphics research is mathematical archaeology (digging up old results from 19th century Italian algebraic geometers). But I have no personal experience, so I can't really judge to which extent this is true.