Integal of ds ==> Integal Integal of r dθ dr
4287
Proving $\int_{0}^{\infty} \mathrm{e}^{-x^2} dx = \frac{\sqrt \pi}{2}$
98660
(complex measures) $d\nu=d\lambda +f\,dm \Rightarrow d|\nu|=d|\lambda| +|f|\,dm$ and $f\in L^1(\nu)\Rightarrow f\in L^1(|\nu|)$
37928
Isomorphism between $D_{2n}/Z(D_{2n})$ and $D_n$
141858
$\forall \vec{b} \in \mathbb{R}^n, B \vec{x} = \vec{b}$ is consistent is equivalent to....
74924
identity element of $(D_n ,\gcd)$
5789
$ d = \gcd(a,b)\Rightarrow\ \gcd(a/d,b/d) = 1$
77891
$(U\circ T)^{*} = T^{*}\circ U^{*}$
16910
du vs. df difference
12825
Bijection between $2^{\mathbb R}$ and $\mathbb{ R ^ R}$
14158
Prove that $R$ is an integral domain $\Leftrightarrow$ $R[x]$ is an integral domain
62140
Direction of $d\mathbf{l}$
76589
When does product of derivatives equals derivative of products?
109318
Equivalence relation $(a,b) R (c,d) \Leftrightarrow a + d = b + c$
85
Difference between $\Delta$, $d$ and $\delta$
81973
Definition of $d (P (x ,y )dx)$
66563
Is $ (A∪B)×(C∩D)=(A∪C)×(B∪D)$ true for all sets A,B,C and D?
56143
Proof of a basic $AC_\omega$ equivalence