$$x'=x,\quad y'=ky,\quad k>0.$$
$$x'=x,\quad y'=y,\quad z'=kz,\quad k>0.$$
715 bytes (114 words) - 07:14, 23 August 2014
$$x=a\cos t,\quad y=\pm\sqrt{b^2-a^2\sin^2t},\quad z=a\sin t,\quad b\geq a,$$
379 bytes (73 words) - 09:40, 5 August 2014
$$\sin x=x+o(x^2),\quad x\to0;$$
$$\cos x=1+O(x^2),\quad x\to0;$$
814 bytes (130 words) - 19:15, 7 July 2014
$$m_j=\overline{m_{-j}},\quad\sum_{-l}^{+l}m_j\lambda^j\leq0,\quad|\lambda|=1;$$
298 bytes (54 words) - 16:36, 13 November 2014
$$B_n: \quad \left\| \begin{array} { r r r r r r }
$$D_n: \quad \left\| \begin{array} { r r r r r r r }
5 KB (334 words) - 11:03, 3 November 2019
a+b=b+a,\quad \text{ and } \quad ab=ba.
427 bytes (66 words) - 22:17, 26 October 2014
$$p^0=1,\quad p^1=\dotsb=p^{n-1}=0,\quad p^n=1;$$
$$p^0=1,\quad p^1=p^2=0;$$
1 KB (172 words) - 13:05, 14 February 2020
\ \ \,\,1\quad \text{if } x>0,\\
\ \ \,\,0\quad \text{if } x=0,\\
630 bytes (102 words) - 15:41, 23 November 2012
$$A\supset(B\supset A),\quad(A\supset(B\supset C))\supset((A\supset B)\supset(A\supset C)),$$
$$A\&B\supset A,\quad A\&B\supset B,\quad A\supset(B\supset A\&B),$$
2 KB (246 words) - 08:00, 12 August 2014
$$x'=x+ky,\quad y'=y,\quad k\ne 0.$$
$$x'=x+ky,\quad y'=y,\quad z'=z,\quad k\ne 0.$$
1 KB (209 words) - 18:28, 21 December 2016
(Lu)(x) = f(x), \quad x\in D,
(Bu)(y) = \phi(y), \quad y\in S.
471 bytes (78 words) - 21:19, 2 May 2012
...align="center"><nowiki>{{User:Ulf Rehmann/sandbox/MSC|20G15|}}</nowiki>${\quad}^{(*)}$</td><td align="center">{{User:Ulf Rehmann/sandbox/MSC|20G15|}} </t
...td><td align="center">{{User:Ulf Rehmann/sandbox/MSC|20G15|14L10,14F35}} $\quad^{(**)}$</td></tr>
3 KB (508 words) - 20:57, 20 January 2012
$$a \cdot x = b \quad;\quad\quad y \cdot a = b $$
1 KB (170 words) - 17:50, 28 December 2013
$$z=f(w),\quad g(w)=\sum_{n=0}^\infty b_nw^n.$$
$$z=f(w)=\frac{1-\sqrt{1-w}}{1+\sqrt{1+w}},\quad w=\frac{4z}{(1+z)^2},\quad g(w)=\frac{1}{\sqrt{1-w}}.$$
1 KB (199 words) - 21:48, 18 October 2014
$$x=\phi(t),\quad t\leq t_0,$$
$$f\in C^{m,n,n},\quad\alpha,\beta\in C^m,\quad\phi\in C^p,\quad m,n\geq0,p\geq1,$$
1 KB (232 words) - 15:01, 14 February 2020
$$\dot x=A(t)x,\quad t\in\mathbf R,\quad x\in\mathbf R^n,$$
550 bytes (90 words) - 17:01, 12 August 2014
...Diamond A,\quad\Box\Diamond\Box A,\quad\neg\Box A,\quad\neg\Box\Diamond A,\quad\neg\Box\Diamond\Box A,$$
2 KB (334 words) - 00:10, 25 November 2018
...cdot a^m = a^{n+m},\quad (ab)^n = a^n b^n,\quad \frac{a^n}{a^m} = a^{n-m},\quad (a^n)^m = a^{nm}.$$
1,020 bytes (193 words) - 21:50, 31 December 2015
f(b)-f(a)=f'(\xi)(b-a),\quad a<\xi<b.
f(x+\Delta x)-f(x)=f'(x+\theta\Delta x)\Delta x,\quad 0<\theta<1.
2 KB (312 words) - 08:41, 28 April 2016
$$t=\arccos x\quad\text{for }|x|<1,$$
$$t=\operatorname{Arcosh}|x|\quad\text{for }|x|>1$$
1 KB (219 words) - 19:57, 21 November 2018