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<title>Tex 科学公式语言 (TeX/LaTeX) - Editor.md examples</title>
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<h1>Tex 科学公式语言 (TeX/LaTeX)</h1>
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<p>Based on KaTeX.js：<a href="http://khan.github.io/KaTeX/" target="_blank">http://khan.github.io/KaTeX/</a></p>
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<p>P.S. Default using CloudFlare KaTeX's CDN. (注：默认使用 CloudFlare 的 CDN，有时加载速度会比较慢，可自定义加载地址。)</p>
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<br/>
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<p><a href="https://jsperf.com/katex-vs-mathjax" target="_blank">KaTeX vs MathJax</a></p>
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</header>
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<div id="test-editormd">
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<textarea style="display:none;">[TOC]
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#### Setting
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{
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tex : true
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}
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#### Custom KaTeX source URL
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```javascript
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// Default using CloudFlare KaTeX's CDN
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// You can custom url
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editormd.katexURL = {
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js : "your url", // default: //cdnjs.cloudflare.com/ajax/libs/KaTeX/0.3.0/katex.min
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css : "your url" // default: //cdnjs.cloudflare.com/ajax/libs/KaTeX/0.3.0/katex.min
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};
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```
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#### Examples
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##### 行内的公式 Inline
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$$E=mc^2$$
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Inline 行内的公式 $$E=mc^2$$ 行内的公式，行内的$$E=mc^2$$公式。
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$$c = \\pm\\sqrt{a^2 + b^2}$$
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$$x > y$$
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$$f(x) = x^2$$
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$$\alpha = \sqrt{1-e^2}$$
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$$\(\sqrt{3x-1}+(1+x)^2\)$$
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$$\sin(\alpha)^{\theta}=\sum_{i=0}^{n}(x^i + \cos(f))$$
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$$\\dfrac{-b \\pm \\sqrt{b^2 - 4ac}}{2a}$$
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$$f(x) = \int_{-\infty}^\infty\hat f(\xi)\,e^{2 \pi i \xi x}\,d\xi$$
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$$\displaystyle \frac{1}{\Bigl(\sqrt{\phi \sqrt{5}}-\phi\Bigr) e^{\frac25 \pi}} = 1+\frac{e^{-2\pi}} {1+\frac{e^{-4\pi}} {1+\frac{e^{-6\pi}} {1+\frac{e^{-8\pi}} {1+\cdots} } } }$$
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$$\displaystyle \left( \sum\_{k=1}^n a\_k b\_k \right)^2 \leq \left( \sum\_{k=1}^n a\_k^2 \right) \left( \sum\_{k=1}^n b\_k^2 \right)$$
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$$a^2$$
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$$a^{2+2}$$
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$$a_2$$
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$${x_2}^3$$
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$$x_2^3$$
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$$10^{10^{8}}$$
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$$a_{i,j}$$
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$$_nP_k$$
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$$c = \pm\sqrt{a^2 + b^2}$$
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$$\frac{1}{2}=0.5$$
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$$\dfrac{k}{k-1} = 0.5$$
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$$\dbinom{n}{k} \binom{n}{k}$$
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$$\oint_C x^3\, dx + 4y^2\, dy$$
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$$\bigcap_1^n p \bigcup_1^k p$$
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$$e^{i \pi} + 1 = 0$$
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$$\left ( \frac{1}{2} \right )$$
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$$x_{1,2}=\frac{-b\pm\sqrt{\color{Red}b^2-4ac}}{2a}$$
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$${\color{Blue}x^2}+{\color{YellowOrange}2x}-{\color{OliveGreen}1}$$
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$$\textstyle \sum_{k=1}^N k^2$$
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$$\dfrac{ \tfrac{1}{2}[1-(\tfrac{1}{2})^n] }{ 1-\tfrac{1}{2} } = s_n$$
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$$\binom{n}{k}$$
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$$0+1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+\cdots$$
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$$\sum_{k=1}^N k^2$$
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$$\textstyle \sum_{k=1}^N k^2$$
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$$\prod_{i=1}^N x_i$$
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$$\textstyle \prod_{i=1}^N x_i$$
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$$\coprod_{i=1}^N x_i$$
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$$\textstyle \coprod_{i=1}^N x_i$$
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$$\int_{1}^{3}\frac{e^3/x}{x^2}\, dx$$
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$$\int_C x^3\, dx + 4y^2\, dy$$
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$${}_1^2\!\Omega_3^4$$
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##### 多行公式 Multi line
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> \`\`\`math or \`\`\`latex or \`\`\`katex
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```math
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f(x) = \int_{-\infty}^\infty
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\hat f(\xi)\,e^{2 \pi i \xi x}
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\,d\xi
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```
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```math
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\displaystyle
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\left( \sum\_{k=1}^n a\_k b\_k \right)^2
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\leq
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\left( \sum\_{k=1}^n a\_k^2 \right)
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\left( \sum\_{k=1}^n b\_k^2 \right)
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```
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```math
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\dfrac{
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\tfrac{1}{2}[1-(\tfrac{1}{2})^n] }
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{ 1-\tfrac{1}{2} } = s_n
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```
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```katex
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\displaystyle
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\frac{1}{
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\Bigl(\sqrt{\phi \sqrt{5}}-\phi\Bigr) e^{
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\frac25 \pi}} = 1+\frac{e^{-2\pi}} {1+\frac{e^{-4\pi}} {
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1+\frac{e^{-6\pi}}
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{1+\frac{e^{-8\pi}}
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{1+\cdots} }
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}
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}
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```
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```latex
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f(x) = \int_{-\infty}^\infty
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\hat f(\xi)\,e^{2 \pi i \xi x}
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\,d\xi
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```
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#### KaTeX vs MathJax
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[https://jsperf.com/katex-vs-mathjax](https://jsperf.com/katex-vs-mathjax "KaTeX vs MathJax")
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</textarea>
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$(function() {
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var testEditor = editormd("test-editormd", {
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width: "90%",
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height: 640,
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tex : true
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