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Apr
6
asked Proof that derivative operator cannot be written in terms of composition operator (without limits)
Apr
4
asked $\gamma=0$? Where is my error?
Apr
2
asked How to solve the following equation? $\left(\sqrt{u^2-1}+u\right)^{1/u}=\pi ^{1/\pi }$
Mar
28
asked Proof that $\lim_{x\to 0^+}{\sin \frac1x}=\sin \left(\frac{1}{2}\right)-\frac 12 \text{Ci}\left(\frac{1}{2}\right)$
Mar
28
asked Find limit $\lim_{a\to 0} \, \frac{\left(a^{2 \varepsilon }-1\right) a^{x-\varepsilon }}{2 \varepsilon \log (a)}$
Mar
28
answered Given this operator what is inverse operator?
Mar
28
asked Given this operator what is inverse operator?
Mar
25
asked General form for series coefficient of Taylor series expansion of $(x+1)^{1/x}$
Mar
25
asked Has anybody ever considered “full derivative”?
Mar
18
answered When $f(x+1)-f(x)=f'(x)$, what are the solutions for $f(x)$?
Mar
17
asked Why hyperreal numbers are built so complicatedly?
Mar
15
asked What special role plays the function $\pi^{\frac x\pi}$ in analysis?
Mar
10
asked What function satisfies the following equation?
Mar
8
asked Can such function exist?
Mar
5
asked What are the negative-dimentional n-sphere and n-cube?
Mar
4
answered Explaining $\cos^\infty$
Mar
1
answered Does a non-trivial solution exist for $f'(x)=f(f(x))$?
Feb
28
asked Closed form solution to $\frac{1}{a-1}= \log a$
Feb
5
answered Is there a general formula for solving 4th degree equations?
Feb
5
asked Are there divergent series that cannot be summed up by any method?