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nov 7 at 14:51
Normed algebra with multiplicative norm, non-isomorphic to $R$, $C$, $H$.
— commenter
1,007414
nov 2 at 9:39
Convergence/Divergence of infinite series $\sum_{n=1}^{\infty} \frac{(\sin(n)+2)^n}{n3^n}$
— Unoqualunque
50123
oct 31 at 6:13
What is the spectral theorem for compact self-adjoint operators on a Hilbert space actually for?
— paul garrett
10.5k12035
oct 28 at 3:13
Possibility to simplify $\sum\limits_{k = - \infty }^\infty {\frac{{{{\left( { - 1} \right)}^k}}}{{a + k}} = \frac{\pi }{{\sin \pi a}}} $
— Argon
9,24822154
oct 20 at 5:43
Example of a stochastic process which does not have the Markov property
— Did
102k1074180
oct 19 at 8:52
Proving the identity $\sum\limits_{k=1}^n {k^3} = \left(\sum\limits_{k=1}^n k\right)^2$ without induction
— Martin Sleziak
20.3k33186
oct 10 at 1:36
Interesting integral related to the Omega Constant/Lambert W Function
— Argon
9,24822154
oct 8 at 15:10
Interesting integral related to the Omega Constant/Lambert W Function
— robjohn♦
59.5k352153
oct 2 at 7:23
What are some good iPhone/iPod Touch/iPad Apps for mathematicians?
— Zev Chonoles
53.5k476177
sep 30 at 5:28
Why does the series $\frac 1 1 + \frac 12 + \frac 13 + \cdots$ not converge?
— Américo Tavares
20.6k334105
sep 15 at 19:24
Proving $ \int_{0}^{\infty} \frac{\ln(t)}{\sqrt{t}}e^{-t} \mathrm dt=-\sqrt{\pi}(\gamma+\ln{4})$
— J. M.
38.9k365160
sep 14 at 19:15
Why determinant of a 2 by 2 matrix is the area of a parallelogram?
— Tpofofn
1,524514
sep 7 at 12:16
What is a good language to develop in for simple, yet customizable math programs?
— Giacomo d'Antonio
51047
aug 28 at 18:34
Why is the derivative of a circle's area its perimeter (and similarly for spheres)?
— Hexagon Tiling
19116
aug 27 at 23:14
Does $ \int_0^{\infty}\frac{\sin x}{x}dx $ have an improper Riemann integral or a Lebesgue integral?
— robjohn♦
59.5k352153
aug 16 at 11:31
Elementary proof regarding the largest prime in the factorization of $n!$
— mixedmath♦
27.3k23892