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visits member for 3 years, 6 months
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2d
asked How the extension of complex plane with complex infinity $\tilde{\infty}$ coexists with extension of real line with positive infinity $\infty$?
Mar
24
asked Is there a special name for pi-based finite difference?
Mar
20
asked What happens if to postulate that complex numbers whose argument differs by $2 \pi$ are not equal?
Mar
16
answered What is the arithmetic mean of all positive integers less than $1$?
Mar
16
answered Is it wrong to tell children that 1/0 = NaN is incorrect, and should be ∞?
Mar
5
asked If the operator is linear but diverges on the basis vectors, how to find its matrix?
Mar
5
asked Is there a name for the class of functions which are infinitely integrable in elementary functions?
Mar
5
answered What is series coefficient for $f(x)=\csc^2 x - \frac1{x^2}$?
Mar
4
asked Why this function is elementary and its pair is not?
Mar
4
asked What is series coefficient for $f(x)=\csc^2 x - \frac1{x^2}$?
Mar
4
asked Given an even function how to obtain the most close odd function and vise versa?
Feb
12
asked Prove that when converge, the following expansions are equal
Jan
8
asked How is called the class of functions whose inverse function is a polynomial?
Nov
7
asked Proof that Newton expansion over derivatives has the properties of an integral
Nov
7
asked Does the series $\sum(-1)^k\binom{x}{k}$ converge for -1<x<0?
Nov
6
asked Natural functions and their consequences
Nov
6
asked Is there an example of an analytic function whose derivative is not analytic?
May
17
asked New differintegral formula: how is it related to other differintegral formulas?
Jan
9
answered If $f(x)+f'(x)-\frac{1}{x+1}\int_{0}^{x}f(t)dt=0$ and $f(0)=0$, then what is $f'(x)$?
Dec
9
answered How to calculate $f(x)$ in $f(f(x)) = e^x$?