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1d
accepted Proving that $|P\{X=m\}-P\{Y=m\}| \leq P\{X\neq Y\}$
Apr
6
accepted Is $\mathbb{R}\times\{0,1\}$ a manifold?
Apr
6
accepted Finding the maximum of $f(x,y,z)=x^ay^bz^c$ where $x,y,z\in [0,\infty)$ and $x^k+y^k+z^k=1$
Mar
16
accepted Directional derivative of determinant at the identity is the trace of the matrix?
Jan
2
accepted Using Lagrange's diagonalization on degenerate linear forms
Dec
29
accepted Any transformation that commutes with a transformation commuting with $S$ must be a polynomial in $S$
Dec
25
accepted Linear transformations preserve the squared sum of norms of orthonormal bases
Dec
22
accepted All the ternary n-words with an even sum of digits and a zero.
Dec
20
accepted All the binary n-words without the sequence 011
Dec
5
accepted Finding the function of the power series $\sum\limits _{n=1}^{\infty}\frac{x^{2n+1}}{n}$
Nov
28
accepted Proving differentiability on every interval equals proving differentiability on all of $\mathbb{R}$?
Nov
26
accepted If $\lim\limits _{x\to\infty}\left(\log f\right)'\left(x\right)$ is negative, then $\int_{0}^{\infty}f\left(x\right)dx $ converges?
Nov
19
accepted Powers of linear transformation and minimal polynomial
Nov
8
accepted If $H<G$ is of finite index, and for some $x\in G$, $xHx^{-1}\subset H$, prove that $xHx^{-1}=H$
Oct
23
accepted Integrating $\frac{\ln{ax}}{x\ln{bx}}$
Oct
23
accepted How many integers satisfy the condition?
Jul
23
accepted Fundamental Theorem of Calculus and the left endpoint of the interval.
Jul
9
accepted A negative third derivative implies a positive first derivative at a point.
Jun
29
accepted Proving that $\ln ^3|x|=x$ has exactly 3 real solutions
Jun
9
accepted Using second derivative to find a bound for the first derivative