Anixx
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 Apr6 asked Proof that derivative operator cannot be written in terms of composition operator (without limits) Apr4 asked $\gamma=0$? Where is my error? Apr2 asked How to solve the following equation? $\left(\sqrt{u^2-1}+u\right)^{1/u}=\pi ^{1/\pi }$ Mar28 asked Proof that $\lim_{x\to 0^+}{\sin \frac1x}=\sin \left(\frac{1}{2}\right)-\frac 12 \text{Ci}\left(\frac{1}{2}\right)$ Mar28 asked Find limit $\lim_{a\to 0} \, \frac{\left(a^{2 \varepsilon }-1\right) a^{x-\varepsilon }}{2 \varepsilon \log (a)}$ Mar28 answered Given this operator what is inverse operator? Mar28 asked Given this operator what is inverse operator? Mar25 asked General form for series coefficient of Taylor series expansion of $(x+1)^{1/x}$ Mar25 asked Has anybody ever considered “full derivative”? Mar18 answered When $f(x+1)-f(x)=f'(x)$, what are the solutions for $f(x)$? Mar17 asked Why hyperreal numbers are built so complicatedly? Mar15 asked What special role plays the function $\pi^{\frac x\pi}$ in analysis? Mar10 asked What function satisfies the following equation? Mar8 asked Can such function exist? Mar5 asked What are the negative-dimentional n-sphere and n-cube? Mar4 answered Explaining $\cos^\infty$ Mar1 answered Does a non-trivial solution exist for $f'(x)=f(f(x))$? Feb28 asked Closed form solution to $\frac{1}{a-1}= \log a$ Feb5 answered Is there a general formula for solving 4th degree equations? Feb5 asked Are there divergent series that cannot be summed up by any method?