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user106860
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Some answers I find very informative

"Bivariate Normal conditional Variance" (projection theorem?)

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7
Can I use Leibniz' rule to differentiate when integral is $\int_0^\gamma f(\gamma,s)dF(s)$, instead of $\int_0^\gamma f(\gamma,s)ds$ ($F$ is a CDF)
May 19, 2018
6
Is there an intuition for cyclic monotonicity?
Nov 30, 2016
6
Why continuity of $X$ needed for $\int_{g^{-1}(y)}^\infty f_X(x) \, dx = 1-F_X(g^{-1}(y))$?
May 26, 2018
5
Why don't terms in the summation expression for an integral (almost) cancel out?
Nov 7, 2018
4
Does the definition of the angle between two vectors require that they have the same "origin"?
Aug 31, 2018
3
Conditions that ensure a convex function is log-concave?
Feb 8, 2020
3
Let $A_1, A_2,\dots$ be a sequence of disjoint, finite subsets of $\mathbb{N}$. How can $\bigcup_{n=1}^\infty A_n$ be either finite or infinite?
Aug 5, 2016
3
If $f_x(x,y)>0$, $f_{xx}(x,y)<0$, $f_y(x,y)>0$, $f_{yy}(x,y)<0$ can $f_{xy} $ change sign?
Feb 20, 2021
3
Intuition for $E[E[X\vert \mathcal{H}]\vert \mathcal{G}]\not= E[X\vert \mathcal{G}]$ where $\mathcal{G}\supset\mathcal{H}$?
Apr 18, 2017
3
Intuition for why a integral with jump discontinuity is continuous but not differentiable?
May 19, 2018
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8
Simple Region plot with "or" condition (||) does not connect the or parts "smoothly"?
6
Benefits/downsides of defining function that is discontinuous at a point "explicitly" vs using piecewise?
6
Applying transformation rule for corresponding indices?
6
Proving equation 3.3.12 in Angrist Pischke Mostly Harmless Econometrics (inverse probability weighting formula for ATT effect)
5
Breaking a Kinked line into $(n-1)$ segments of equal Euclidean distance?