markdown手册（一）

希望能做一些麻瓜的事情造福人类。。。

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f(x)=x f ( x ) = x

$ f(x)=x $

s=∑n1ni s = ∑ 1 n n i

$
s=\sum_1^n{n_i}
$

x2 x 2

$ x^2 $

xi x i

$ x_i $

{a+x} { a + x }

$ \lbrace a+x \rbrace $

⟨x⟩ ⟨ x ⟩

$ \langle x \rangle $

⌈x2⌉ ⌈ x 2 ⌉

$ \lceil \frac{x}{2} \rceil $

⌊x⌋ ⌊ x ⌋

$ \lfloor x \rfloor $

{∑ni=0i2=2ax2+1} { ∑ i = 0 n i 2 = 2 a x 2 + 1 }

$
    \lbrace  \sum_{i=0}^{n}i^{2}=\frac{2a}{x^2+1}   \rbrace
$

{∑ni=0i2=2ax2+1} { ∑ i = 0 n i 2 = 2 a x 2 + 1 }

$  
\left\lbrace 
\sum_{i=0}^{n}i^{2}=\frac{2a}{x^2+1}                            
\right\rbrace 
$

∑ni ∑ i n

$\sum_i^n$

∫∞1 ∫ 1 ∞

$ \int_{1}^{\infty} $

∏n1 ⋃n1 ∬n1 ∏ 1 n   ⋃ 1 n   ∬ 1 n

$
\prod_{1}^{n} \\
\bigcup_{1}^{n} \\
\iint_{1}^{n}
$

ab a b

$
\frac ab
$

12 1 2

$
\frac{1}{2}
$

a+1b+1 a + 1 b + 1

$
{a+1 \over b+1}
$

x2‾‾√x+1 x 2 x + 1

$
\sqrt[x+1]{x^2}
$

y={xα y = { x α

$y =\begin{cases} x\\ \alpha	\end{cases}$

⋅ ⋅

$\cdot$

≤ ≤

$\leq$  

≥ ≥

$\geq$  

≠ ≠

$\neq$  

≈ ≈

$\approx$  

∏ ∏

$\prod$

∐ ∐

$\coprod$

⋯ ⋯

$\cdots$

∫ ∫

$\int$

∬ ∬

$\iint$

∮ ∮

$\oint$

∞ ∞

$\infty$

∇ ∇

$\nabla$

∵ ∵

$\because$

∴ ∴

$\therefore$

α α

$\alpha$  

β β

$\beta$

γ γ

$\gamma$

Γ Γ

$\Gamma$

δ δ

$\delta$

Δ Δ

$\Delta$

ϵ ϵ

$\epsilon$

ε ε

$\varepsilon$

ζ ζ

$\zeta$

η η

$\eta$

θ θ

$\theta$

Θ Θ

$\Theta$

ϑ ϑ

$\vartheta$

ι ι

$\iota$

π π

$\pi$

ϕ ϕ

$\phi$

ψ ψ

$\psi$

Ψ Ψ

$\Psi$

ω ω

$\omega$

Ω Ω

$\Omega$  

χ χ

$\chi$

ρ ρ

$\rho$

ο ο

$\omicron$  

σ σ

$\sigma$  

Σ Σ

$\Sigma$  

ν ν

$\nu$

ξ ξ

$\xi$

τ τ

$\tau$

λ λ

$\lambda$

Λ Λ

$\Lambda$

μ μ

$\mu$

∂ ∂

$\partial$