Reputation
2,061
Top tag
Next privilege 2,500 Rep.
Create tag synonyms
Badges
1 9 21
Impact
~29k people reached

Mar
15
asked What special role plays the function $\pi^{\frac x\pi}$ in analysis?
Mar
15
comment What function satisfies the following equation?
What if additional condition is imposed, that isfunction $f(x+\pi/4)e^{-x}\Gamma(x/\pi +1/4)$ is even?
Mar
10
comment What function satisfies the following equation?
This is Great!!! Thank you very much!
Mar
10
accepted What function satisfies the following equation?
Mar
10
asked What function satisfies the following equation?
Mar
10
comment What exactly *is* the Riemann zeta function?
The latest identity is wrong :-(
Mar
8
comment Can such function exist?
What about the second part of the question?
Mar
8
comment Can such function exist?
What about the second part?
Mar
8
asked Can such function exist?
Mar
5
comment What are the negative-dimentional n-sphere and n-cube?
@MvG if distance is defined on a fractal (for instance, on Serpinsky triangle en.wikipedia.org/wiki/Hausdorff_dimension#mediaviewer/… ), then all points equally distant from a given one form a sphere.
Mar
5
comment What are the negative-dimentional n-sphere and n-cube?
@Yuval Filmus what non-integer positive dimentional space and n-sphere is clear: a fractal. But what about negative?
Mar
5
asked What are the negative-dimentional n-sphere and n-cube?
Mar
4
revised Explaining $\cos^\infty$
another form
Mar
4
suggested approved edit on Explaining $\cos^\infty$
Mar
4
comment Solving $\cos x=x$
math.stackexchange.com/questions/227317/explaining-cos-infty/…
Mar
4
comment What is the solution of cos(x)=x?
math.stackexchange.com/questions/227317/explaining-cos-infty/…
Mar
4
comment Explaining $\cos^\infty$
@GDumphart you can check it. If you eliminate arctan and tan, the result changes, becomes wrong. It you know other ways to simplify it, you are welcome.
Mar
4
answered Explaining $\cos^\infty$
Mar
4
comment Solving $2x - \sin 2x = \pi/2$ for $0 < x < \pi/2$
Why the index of the Bessel functions is not equal to the argument in your expression?
Mar
4
comment Solving $2x - \sin 2x = \pi/2$ for $0 < x < \pi/2$
By the way, the formula $$\sum_{n=1}^\infty \frac{2J_n(n)}{n} \sin(\pi n/2)$$ works for Dottier number.