21,555 reputation
23382
bio website
location
age 29
visits member for 4 years, 4 months
seen 5 hours ago

Dec
3
accepted If the difference of two i.i.d. random variables is normal, must the variables themselves be normal?
Dec
3
accepted Are there functions that satisfy $f(km)\bmod m=f(m)$ that are not of the form $m\mapsto n\bmod m$?
Nov
23
accepted If the sum of two i.i.d. random variables is normal, must the variables themselves be normal?
Nov
21
accepted Why is the nuclear norm called so?
Nov
21
accepted You can't solve Laplace's equation with boundary conditions on isolated points. But why?
Nov
1
accepted Does this notion of the “directed area” of a closed curve in $\mathbb R^3$ have a standard name?
May
31
accepted Why is $\square\square=\square$ and $\Diamond\Diamond=\Diamond$ in the S5 modal logic?
Mar
26
accepted Is the determinant the “only” group homomorphism from $\mathrm{GL}_n(\mathbb R)$ to $\mathbb R^\times$?
May
31
accepted What is the name for a vector field that is both divergence-free and curl-free?
Aug
22
accepted Uniform distributions on the space of rotations in 3D
Jun
11
accepted On minimizing the area of an enclosing surface subject to nonnegative Gaussian curvature
May
30
accepted Maximizing a quadratic subject to $\lVert x\rVert_2 \le 1$
Apr
29
accepted Why does this distribution of polynomial roots resemble a collection of affine IFS fractals?
Jan
25
accepted Is there a nice way to define the “maximum” of two quadratic forms?
Dec
20
accepted Is there an analytical solution to this nonlinear ODE?
Mar
23
accepted Is there a specific name and/or representation for the group of distinguishable orientations of a given shape?
Jan
13
accepted Evaluating $f(x) f(x/2) f(x/4) f(x/8) \cdots$
Nov
14
accepted On the relationship between the commutators of a Lie group and its Lie algebra
Nov
4
accepted Why does the polynomial equation $1 + x + x^2 + \cdots + x^n = S$ have at most two solutions in $x$?
Oct
3
accepted Why are these two definitions of the Mandelbrot set equivalent?