The symbol $(Y-Y_1)^-$
49287
What is $A^-$ in topology?
17508
Knowing $|z|$ and $|w|$ (and possibly $z\overline{w}$), what are $|z+w|^2$, $|zw|^2$, $|z-w|^2$, $|z/w|^2$?
86567
Understanding $\sum_{x = 0}^y x = \frac{y(y + 1)}{2}$ in a step of a proof
1932
How to show this equality of $\rho(X,Y)$
17859
Showing $F[x,y]/(ax^2+by^2-1)$ is a Dedekind domain
378
Does $\hat{\beta}=(X′X)^{−1}X′ \ Y$ simplify further?
102398
Help deriving that $\mathrm{sign} : S_n\to \{\pm 1\}$ is multiplicative
140829
What does $b_i\mid b_{i+1}$ mean in this context?
70266
1-1 correspondence between [0,1] and [0,1)
129647
$A^{-1}$ has integer entries if and only if the ${\rm det}\ (A) =\pm 1$
124827
Show that $Y\sim N(a+A\mu,AVA^T)$
106609
Show that $e^{iy} = 1 + iy + \frac{\mu_1 y^2}{2}$ for all $y \in \mathbb{R}$ with $|\mu_1| \leq 1$
131629
A helpful proof in contracting the Christoffel symbol?
131223
How to solve the equation $yy''-y'y^2-(y')^2$?
15025
Solve $xu_x+(x+y)u_y=1$ when $u(1,y)=y$
100968
Why is $|e^{i \lambda z}| |e^{- \lambda y}|= |e^{- \lambda y}|$ here?
76188
Show $(W_1 + W_2 )^\perp = W_1^\perp \cap W_2^\perp$ and $W_1^\perp + W_2^\perp ⊆ (W_1 \cap W_2 )^\perp$