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 Apr 6 revised Finding the maximum of $f(x,y,z)=x^ay^bz^c$ where $x,y,z\in [0,\infty)$ and $x^k+y^k+z^k=1$ edited body Apr 6 revised Is $\mathbb{R}\times\{0,1\}$ a manifold? added 1 character in body Apr 2 revised Finding the maximum of $f(x,y,z)=x^ay^bz^c$ where $x,y,z\in [0,\infty)$ and $x^k+y^k+z^k=1$ added 12 characters in body Mar 28 revised Finding the inverse of $f(x,y)=(e^{x}\cos(y),e^{x}\sin(y))$ around a neighborhood. Some additional thoughts Nov 28 revised Proving differentiability on every interval equals proving differentiability on all of $\mathbb{R}$? edited tags Oct 29 revised Show that if $E\subseteq F$ is a subfield and $f,g\in E[x]$ then $\gcd(f,g)$ (relative to $F$) is in $E$ added 300 characters in body Oct 23 revised Integrating $\frac{\ln{ax}}{x\ln{bx}}$ added 20 characters in body Jun 30 revised A negative third derivative implies a positive first derivative at a point. added 47 characters in body Jun 17 revised For any closed set $A$ of $\mathbb R$ , does there exists a function $f:\mathbb R \to \mathbb R$ such that, $f$ is discontinuous exactly on $A$? deleted 258 characters in body Jun 9 revised Using second derivative to find a bound for the first derivative deleted 26 characters in body Jun 9 revised Evaluate $\lim \limits_{n\to \infty }\sin^2 (\pi \sqrt{(n!)^2-(n!)})$ deleted 83 characters in body Jun 9 revised Evaluate $\lim \limits_{n\to \infty }\sin^2 (\pi \sqrt{(n!)^2-(n!)})$ added 6 characters in body Jun 7 revised Proving the inequality $2^{-1+\frac{1}{n}}\left(x+1\right)\leq\left(x^{n}+1\right)^{\frac{1}{n}}$ for $n\in\mathbb{N}$ and $x>0$ edited body May 25 revised Limit of $\frac{f\left(x+g\left(x\right)\right)-f\left(g\left(x\right)\right)}{x}$ as $x\to 0$ edited title May 25 revised Limit of $\frac{f\left(x+g\left(x\right)\right)-f\left(g\left(x\right)\right)}{x}$ as $x\to 0$ added 6 characters in body Apr 23 revised Fixed point of a differentiable function on a closed interval added 1 character in body; added 2 characters in body Mar 16 revised Generalized Bernoulli's inequality of the form $\frac{1}{1-\sum_{i=1}^nx_i}\geq\prod_{i=1}^n(1+x_i)$ added 472 characters in body Nov 25 revised Proving that if $a_n\in\mathbb{Z}$ for all $n$ then it's limit is also in $\mathbb{Z}$? added 224 characters in body Nov 7 revised Proving a set of functions from $\mathbb{N}$ to $\{1,0\}$ is countable added 300 characters in body Nov 6 revised Proving a set of functions from $\mathbb{N}$ to $\{1,0\}$ is countable added 417 characters in body