Markdown 数学公式输入

(a+b)

[a+b ]

$a+b$    //左边显示
$$a+b$$  //居中显示

(vec A)

$vec A$

(x^{y^z} = (1+e^x)^{-2xy^w})

$x^{y^z} = (1+e^x)^{-2xy^w}$

(f(x, y) = x^2 + y^2, x epsilon [0, 100], y epsilon {3, 4, 5})

$f(x, y) = x^2 + y^2, x epsilon [0, 100], y epsilon {3, 4, 5}$

((frac {x} {y})^2 , left(frac {x} {y} ight)^2)

$(frac {x} {y})^2 , left(frac {x} {y} 
ight)^2$

(left. frac{du}{dx} ight| _{x=0})

$left. frac{du}{dx} 
ight| _{x=0}$

(frac{1}{2x+1} , {{1} over {2x+1}})

$frac{1}{2x+1} , {{1} over {2x+1}}$

(sqrt[3]{9}, sqrt{16})

$sqrt[3]{9}, sqrt{16}$

(f(x_1,x_2,ldots,x_n) = x_1^2+x_2^2+cdots+x_n^2)

$f(x_1,x_2,ldots,x_n) = x_1^2+x_2^2+cdots+x_n^2$

(vec a cdot vec b = 0)

$vec a cdot vec b = 0$

(int_0^1x^2dx)

$int_0^1x^2dx$

(lim_{n ightarrow+infty}frac{1}{n(n+1)})

$lim_{n
ightarrow+infty}frac{1}{n(n+1)}$

(sum_1^nfrac{1}{x^2}, prod_{i=0}^n{1 over {x^2}})

$sum_1^nfrac{1}{x^2}, prod_{i=0}^n{1 over {x^2}}$

(alpha eta gamma Gamma delta Delta epsilon varepsilon zeta eta heta Theta vartheta iota kappa lambda Lambda mu u xi Xi pi Pi varpi ho varrho sigma Sigma varsigma au upsilon Upsilon phi Phi varphi chi psi Psi Omega omega)

$alpha eta gamma Gamma delta Delta epsilon varepsilon zeta eta 	heta Theta vartheta iota kappa lambda Lambda mu 
u xi Xi pi Pi varpi 
ho varrho sigma Sigma varsigma 	au upsilon Upsilon phi Phi varphi chi psi Psi Omega omega$

显示	命令	显示	命令
(alpha)	alpha	(eta)	eta
(gamma)	gamma	(delta)	delta
(epsilon)	epsilon	(zeta)	zeta
(eta)	eta	( heta)	heta
(iota)	iota	(kappa)	kappa
(lambda)	lambda	(mu)	mu
( u)	u	(xi)	xi
(pi)	pi	( ho)	ho
(sigma)	sigma	( au)	au
(upsilon)	upsilon	(phi)	phi
(chi)	chi	(psi)	psi
(omega)	omega

(# $ \%&\_{})

$# $ \%&\_{}$

(pm imes div mid)

$pm 	imes div mid$

(cdot circ ast igodot igotimes leq geq eq approx equiv sum prod coprod)

$cdot circ ast igodot igotimes leq geq 
eq approx equiv sum prod coprod$

(emptyset in otin subset supset subseteq supseteq igcap igcup igvee igwedge iguplus igsqcup)

$emptyset in 
otin subset supset subseteq supseteq igcap igcup igvee igwedge iguplus igsqcup$

(log lg ln)

$log lg ln$

(ot angle 30^circ sin cos an cot sec csc)

$ot angle 30^circ sin cos 	an cot sec csc$

(y{prime}x int iint iiint oint lim infty abla)

$y{prime}x int iint iiint oint lim infty 
abla$

(ecause herefore forall exists)

$ecause 	herefore forall exists$

(uparrow downarrow leftarrow ightarrow Uparrow Downarrow Leftarrow Rightarrow longleftarrow longrightarrow Longleftarrow Longrightarrow)

$uparrow downarrow leftarrow 
ightarrow Uparrow Downarrow Leftarrow Rightarrow longleftarrow longrightarrow Longleftarrow Longrightarrow$

(overline{a+b+c+d} underline{a+b+c+d} overbrace{a+underbrace{b+c}_{1.0}+d}^{2.0} hat{y} check{y} reve{y})

$overline{a+b+c+d}
underline{a+b+c+d}
overbrace{a+underbrace{b+c}_{1.0}+d}^{2.0}
hat{y} check{y} reve{y}$

( egin{matrix} 1&0&0\ 0&1&0\ 0&0&1\ end{matrix} )

$
egin{matrix}
1&0&0\
0&1&0\
0&0&1\
end{matrix}
$

在起始、结束标记处用下列词替换 matrix
pmatrix ：小括号边框
bmatrix ：中括号边框
Bmatrix ：大括号边框
vmatrix ：单竖线边框
Vmatrix ：双竖线边框

[egin{bmatrix} {a_{11}}&{a_{12}}&{cdots}&{a_{1n}}\ {a_{21}}&{a_{22}}&{cdots}&{a_{2n}}\ {vdots}&{vdots}&{ddots}&{vdots}\ {a_{m1}}&{a_{m2}}&{cdots}&{a_{mn}}\ end{bmatrix} ]

$$
egin{bmatrix}
{a_{11}}&{a_{12}}&{cdots}&{a_{1n}}\
{a_{21}}&{a_{22}}&{cdots}&{a_{2n}}\
{vdots}&{vdots}&{ddots}&{vdots}\
{a_{m1}}&{a_{m2}}&{cdots}&{a_{mn}}\
end{bmatrix}
$$

[egin{array}{c|lll} {↓}&{a}&{b}&{c}\ hline {R_1}&{c}&{b}&{a}\ {R_2}&{b}&{c}&{c}\ end{array} ]

$$
egin{array}{c|lll}
{↓}&{a}&{b}&{c}\
hline
{R_1}&{c}&{b}&{a}\
{R_2}&{b}&{c}&{c}\
end{array}
$$

[egin{cases} a_1x+b_1y+c_1z=d_1\ a_2x+b_2y+c_2z=d_2\ a_3x+b_3y+c_3z=d_3\ end{cases} ]

$$
egin{cases}
a_1x+b_1y+c_1z=d_1\
a_2x+b_2y+c_2z=d_2\
a_3x+b_3y+c_3z=d_3\
end{cases}
$$

https://www.jianshu.com/p/a0aa94ef8ab2
https://math.meta.stackexchange.com/questions/5020/mathjax-basic-tutorial-and-quick-reference
https://blog.csdn.net/xingxinmanong/article/details/78528791