初学LaTeX常见的数学符号误用：是 \text{log}\ x <script defer crossorigin="anonymous" integrity="sha256-bgI9WhLOPSUlPrdgHUg3rPIB2vq+D+mYkUTM3q0U8fw=" onload="katex.render(this.parentNode.innerText, this.parentNode, {"fleqn":false,"leqno":false,"output":"htmlAndMathml","throwOnError":false,"errorColor":"#cc0000","minRuleThickness":0.05,"maxSize":10,"maxExpand":1000,"macros":{},"colorIsTextColor":false,"displayMode":false})" src="https://lf6-cdn-tos.bytecdntp.com/cdn/expire-1-M/KaTeX/0.15.2/katex.min.js"> 而不是 log x <script defer crossorigin="anonymous" integrity="sha256-bgI9WhLOPSUlPrdgHUg3rPIB2vq+D+mYkUTM3q0U8fw=" onload="katex.render(this.parentNode.innerText, this.parentNode, {"fleqn":false,"leqno":false,"output":"htmlAndMathml","throwOnError":false,"errorColor":"#cc0000","minRuleThickness":0.05,"maxSize":10,"maxExpand":1000,"macros":{},"colorIsTextColor":false,"displayMode":false})" src="https://lf6-cdn-tos.bytecdntp.com/cdn/expire-1-M/KaTeX/0.15.2/katex.min.js"> 是 \text{min} <script defer crossorigin="anonymous" integrity="sha256-bgI9WhLOPSUlPrdgHUg3rPIB2vq+D+mYkUTM3q0U8fw=" onload="katex.render(this.parentNode.innerText, this.parentNode, {"fleqn":false,"leqno":false,"output":"htmlAndMathml","throwOnError":false,"errorColor":"#cc0000","minRuleThickness":0.05,"maxSize":10,"maxExpand":1000,"macros":{},"colorIsTextColor":false,"displayMode":false})" src="https://lf6-cdn-tos.bytecdntp.com/cdn/expire-1-M/KaTeX/0.15.2/katex.min.js"> 和 \text{max} <script defer crossorigin="anonymous" integrity="sha256-bgI9WhLOPSUlPrdgHUg3rPIB2vq+D+mYkUTM3q0U8fw=" onload="katex.render(this.parentNode.innerText, this.parentNode, {"fleqn":false,"leqno":false,"output":"htmlAndMathml","throwOnError":false,"errorColor":"#cc0000","minRuleThickness":0.05,"maxSize":10,"maxExpand":1000,"macros":{},"colorIsTextColor":false,"displayMode":false})" src="https://lf6-cdn-tos.bytecdntp.com/cdn/expire-1-M/KaTeX/0.15.2/katex.min.js"> 而不是 min <script defer crossorigin="anonymous" integrity="sha256-bgI9WhLOPSUlPrdgHUg3rPIB2vq+D+mYkUTM3q0U8fw=" onload="katex.render(this.parentNode.innerText, this.parentNode, {"fleqn":false,"leqno":false,"output":"htmlAndMathml","throwOnError":false,"errorColor":"#cc0000","minRuleThickness":0.05,"maxSize":10,"maxExpand":1000,"macros":{},"colorIsTextColor":false,"displayMode":false})" src="https://lf6-cdn-tos.bytecdntp.com/cdn/expire-1-M/KaTeX/0.15.2/katex.min.js"> 和 max <script defer crossorigin="anonymous" integrity="sha256-bgI9WhLOPSUlPrdgHUg3rPIB2vq+D+mYkUTM3q0U8fw=" onload="katex.render(this.parentNode.innerText, this.parentNode, {"fleqn":false,"leqno":false,"output":"htmlAndMathml","throwOnError":false,"errorColor":"#cc0000","minRuleThickness":0.05,"maxSize":10,"maxExpand":1000,"macros":{},"colorIsTextColor":false,"displayMode":false})" src="https://lf6-cdn-tos.bytecdntp.com/cdn/expire-1-M/KaTeX/0.15.2/katex.min.js"> 是 \text{Pr} <script defer crossorigin="anonymous" integrity="sha256-bgI9WhLOPSUlPrdgHUg3rPIB2vq+D+mYkUTM3q0U8fw=" onload="katex.render(this.parentNode.innerText, this.parentNode, {"fleqn":false,"leqno":false,"output":"htmlAndMathml","throwOnError":false,"errorColor":"#cc0000","minRuleThickness":0.05,"maxSize":10,"maxExpand":1000,"macros":{},"colorIsTextColor":false,"displayMode":false})" src="https://lf6-cdn-tos.bytecdntp.com/cdn/expire-1-M/KaTeX/0.15.2/katex.min.js"> 而不是 Pr <script defer crossorigin="anonymous" integrity="sha256-bgI9WhLOPSUlPrdgHUg3rPIB2vq+D+mYkUTM3q0U8fw=" onload="katex.render(this.parentNode.innerText, this.parentNode, {"fleqn":false,"leqno":false,"output":"htmlAndMathml","throwOnError":false,"errorColor":"#cc0000","minRuleThickness":0.05,"maxSize":10,"maxExpand":1000,"macros":{},"colorIsTextColor":false,"displayMode":false})" src="https://lf6-cdn-tos.bytecdntp.com/cdn/expire-1-M/KaTeX/0.15.2/katex.min.js"> 是 \text{sin}\ x <script defer crossorigin="anonymous" integrity="sha256-bgI9WhLOPSUlPrdgHUg3rPIB2vq+D+mYkUTM3q0U8fw=" onload="katex.render(this.parentNode.innerText, this.parentNode, {"fleqn":false,"leqno":false,"output":"htmlAndMathml","throwOnError":false,"errorColor":"#cc0000","minRuleThickness":0.05,"maxSize":10,"maxExpand":1000,"macros":{},"colorIsTextColor":false,"displayMode":false})" src="https://lf6-cdn-tos.bytecdntp.com/cdn/expire-1-M/KaTeX/0.15.2/katex.min.js"> 和 \text{cos}\ x <script defer crossorigin="anonymous" integrity="sha256-bgI9WhLOPSUlPrdgHUg3rPIB2vq+D+mYkUTM3q0U8fw=" onload="katex.render(this.parentNode.innerText, this.parentNode, {"fleqn":false,"leqno":false,"output":"htmlAndMathml","throwOnError":false,"errorColor":"#cc0000","minRuleThickness":0.05,"maxSize":10,"maxExpand":1000,"macros":{},"colorIsTextColor":false,"displayMode":false})" src="https://lf6-cdn-tos.bytecdntp.com/cdn/expire-1-M/KaTeX/0.15.2/katex.min.js"> 而不是 sin x <script defer crossorigin="anonymous" integrity="sha256-bgI9WhLOPSUlPrdgHUg3rPIB2vq+D+mYkUTM3q0U8fw=" onload="katex.render(this.parentNode.innerText, this.parentNode, {"fleqn":false,"leqno":false,"output":"htmlAndMathml","throwOnError":false,"errorColor":"#cc0000","minRuleThickness":0.05,"maxSize":10,"maxExpand":1000,"macros":{},"colorIsTextColor":false,"displayMode":false})" src="https://lf6-cdn-tos.bytecdntp.com/cdn/expire-1-M/KaTeX/0.15.2/katex.min.js"> 和 cos x <script defer crossorigin="anonymous" integrity="sha256-bgI9WhLOPSUlPrdgHUg3rPIB2vq+D+mYkUTM3q0U8fw=" onload="katex.render(this.parentNode.innerText, this.parentNode, {"fleqn":false,"leqno":false,"output":"htmlAndMathml","throwOnError":false,"errorColor":"#cc0000","minRuleThickness":0.05,"maxSize":10,"maxExpand":1000,"macros":{},"colorIsTextColor":false,"displayMode":false})" src="https://lf6-cdn-tos.bytecdntp.com/cdn/expire-1-M/KaTeX/0.15.2/katex.min.js"> 是 x \times y <script defer crossorigin="anonymous" integrity="sha256-bgI9WhLOPSUlPrdgHUg3rPIB2vq+D+mYkUTM3q0U8fw=" onload="katex.render(this.parentNode.innerText, this.parentNode, {"fleqn":false,"leqno":false,"output":"htmlAndMathml","throwOnError":false,"errorColor":"#cc0000","minRuleThickness":0.05,"maxSize":10,"maxExpand":1000,"macros":{},"colorIsTextColor":false,"displayMode":false})" src="https://lf6-cdn-tos.bytecdntp.com/cdn/expire-1-M/KaTeX/0.15.2/katex.min.js"> 而不是 x * y <script defer crossorigin="anonymous" integrity="sha256-bgI9WhLOPSUlPrdgHUg3rPIB2vq+D+mYkUTM3q0U8fw=" onload="katex.render(this.parentNode.innerText, this.parentNode, {"fleqn":false,"leqno":false,"output":"htmlAndMathml","throwOnError":false,"errorColor":"#cc0000","minRuleThickness":0.05,"maxSize":10,"maxExpand":1000,"macros":{},"colorIsTextColor":false,"displayMode":false})" src="https://lf6-cdn-tos.bytecdntp.com/cdn/expire-1-M/KaTeX/0.15.2/katex.min.js"> 是 \text{arg} <script defer crossorigin="anonymous" integrity="sha256-bgI9WhLOPSUlPrdgHUg3rPIB2vq+D+mYkUTM3q0U8fw=" onload="katex.render(this.parentNode.innerText, this.parentNode, {"fleqn":false,"leqno":false,"output":"htmlAndMathml","throwOnError":false,"errorColor":"#cc0000","minRuleThickness":0.05,"maxSize":10,"maxExpand":1000,"macros":{},"colorIsTextColor":false,"displayMode":false})" src="https://lf6-cdn-tos.bytecdntp.com/cdn/expire-1-M/KaTeX/0.15.2/katex.min.js"> 而不是 arg <script defer crossorigin="anonymous" integrity="sha256-bgI9WhLOPSUlPrdgHUg3rPIB2vq+D+mYkUTM3q0U8fw=" onload="katex.render(this.parentNode.innerText, this.parentNode, {"fleqn":false,"leqno":false,"output":"htmlAndMathml","throwOnError":false,"errorColor":"#cc0000","minRuleThickness":0.05,"maxSize":10,"maxExpand":1000,"macros":{},"colorIsTextColor":false,"displayMode":false})" src="https://lf6-cdn-tos.bytecdntp.com/cdn/expire-1-M/KaTeX/0.15.2/katex.min.js"> 很少登录，今天登录了，就顺便再发一个，这是公众号“算法时空”今天的推送，我第一次用LaTeX也犯了这些错误。这个公众号是西邮的一个老师的，他的微博也叫这个名字，有兴趣可以关注一下他。（广告费就不用了哈哈哈）

不知道大家能否看出差别在哪呢？源码如下：初学LaTeX常见的数学符号误用： - 是[imath] \text{log}\ x [/imath]而不是[imath] log x [/imath] - 是[imath] \text{min} [/imath]和[imath] \text{max} [/imath]而不是[imath] min [/imath]和[imath] max [/imath] - 是[imath] \text{Pr} [/imath]而不是[imath] Pr [/imath] - 是[imath] \text{sin}\ x [/imath]和[imath] \text{cos}\ x [/imath]而不是[imath] sin x [/imath]和[imath] cos x [/imath] - 是[imath] x \times y [/imath]而不是[imath] x * y [/imath] - 是[imath] \text{arg} [/imath]而不是[imath] arg [/imath] if(window.hljsLoader && !document.currentScript.parentNode.hasAttribute('data-s9e-livepreview-onupdate')) { window.hljsLoader.highlightBlocks(document.currentScript.parentNode); } PS: 论坛的数学公式功能似乎还是不够强。如果用VSCode + LaTeX Workshop的话，你打 Pr[x = i] ，它会提醒你最好用 \Pr[x = i] ，大部分LaTeX应该都会提示。。。吧。上面我用 \text{Pr} 是因为这里打 \Pr 没有作用。。。大概就是这个意思~

Error PS: 论坛的数学公式功能似乎还是不够强。这里的数学公式是用 KaTeX 渲染的，刚试了下，在官网的公式编辑器上渲染没问题，可能是某些配置的关系。（但我暂时还没空搞，先将就着吧，或者有有兴趣的小伙伴可以帮忙看看？🤪

一直都没注意到这个问题orz 谢谢分享！

Colin_Downey 我也是，第一次用完全没意识到～

Error 补一下原文链接，就不局限微信啦～

0x0001 啊对！漏了原文链接，感谢补充。再补充一个微博链接，他微博上有不少有趣的想法，个人觉得比公众号更值得一看。

Error 关注+1！我有做过一个 RSS 订阅微博的工具，生成了它的链接啦~ https://rssfeed.today/weibo/rss/5819320755

这个我还真不知道。。我以前写的 blog 都是直接 min(x) 的，有时候更随意，直接 min{f(x)} 。。学艺不精（还好没人看我的 blog （逃

Error 哈哈哈，上面列出的大部分不算是误用符号，是错误使用Latex而已。我都错习惯了，错错得对:-P 我这里列一个误用的例子，大家看看能区分吗？ [imath] \sum_{i=0}^n [/imath] 与 [imath] \Sigma_{i=0}^n [/imath]的区别？ if(window.hljsLoader && !document.currentScript.parentNode.hasAttribute('data-s9e-livepreview-onupdate')) { window.hljsLoader.highlightBlocks(document.currentScript.parentNode); } 公式显示不正常啊！站长 @0x0001

\Pi <script defer crossorigin="anonymous" integrity="sha256-bgI9WhLOPSUlPrdgHUg3rPIB2vq+D+mYkUTM3q0U8fw=" onload="katex.render(this.parentNode.innerText, this.parentNode, {"fleqn":false,"leqno":false,"output":"htmlAndMathml","throwOnError":false,"errorColor":"#cc0000","minRuleThickness":0.05,"maxSize":10,"maxExpand":1000,"macros":{},"colorIsTextColor":false,"displayMode":false})" src="https://lf6-cdn-tos.bytecdntp.com/cdn/expire-1-M/KaTeX/0.15.2/katex.min.js"> 与 \prod <script defer crossorigin="anonymous" integrity="sha256-bgI9WhLOPSUlPrdgHUg3rPIB2vq+D+mYkUTM3q0U8fw=" onload="katex.render(this.parentNode.innerText, this.parentNode, {"fleqn":false,"leqno":false,"output":"htmlAndMathml","throwOnError":false,"errorColor":"#cc0000","minRuleThickness":0.05,"maxSize":10,"maxExpand":1000,"macros":{},"colorIsTextColor":false,"displayMode":false})" src="https://lf6-cdn-tos.bytecdntp.com/cdn/expire-1-M/KaTeX/0.15.2/katex.min.js"> 的区别。这是一种符号误用。上面公式的代码如下，似乎是出了问题。 [imath] \Pi [/imath] 与 [imath] \prod [/imath] if(window.hljsLoader && !document.currentScript.parentNode.hasAttribute('data-s9e-livepreview-onupdate')) { window.hljsLoader.highlightBlocks(document.currentScript.parentNode); } 更多例子可以参考文献。

[转] 常见的数学符号误用

Error

Bintou 更多例子可以参考文献

wow~ 这个文献可以，得认真读一遍！

Bintou

关于符号误用最最最较真的是Knuth，Latex是他的Tex发展出来的。有一个关于希腊字母\delta的故事，说的是Knuth认为大多数人把这符号写错了，于是在他的Tex中给出了正确的写法。之前有一幅图展示两种delta的不同，现在找不回来了。大家有空去Google一下。大概就是delta脑袋上的那一个小勾勾是怎么个勾法。。。

\delta

Error

Bintou 大概就是delta脑袋上的那一个小勾勾是怎么个勾法

哈哈哈哈哈哈就是这篇文章吧。

0x0001

Bintou 公式显示不正常啊！站长

我这里可以啊？

\sum_{i=0}^n 与 \Sigma_{i=0}^n 的区别？

Bintou

0x0001 不对啊，显示出来都是重复的，但是，我只有一个\sum，是有显示公式，但是现实错误。

Colin_Downey

Bintou ！！！经常用\Sigma作为求和的我:;(∩´﹏`∩);:

0x0001

Bintou 不太明白哪里显示错误，也许可以贴下截图？Ctrl/Cmd + V 就可以自动上传截的图片。

\sum \Sigma

0x709394

0x0001

影分身。 katex的CSS没有加载到。在Firefox里那个onload没有运行。Chrome没问题。

0x0001

0x709394 对哦，是一个已知的兼容问题，尽快修复🤪
https://caniuse.com/#feat=link-rel-preload

hsxfjames

0x0001 感觉是不是可以只输出 html （反正你也不用 SEO （逃

0x0001

hsxfjames 发现了问题所在，Chrome 不支持 MathML，所以就有了两者一体的渲染姿势（捂脸

这个是只输出 MathML 的效果：

hsxfjames

0x0001 不是，是 MathML 本来就应该被隐藏的，上次不是跟你说过 Firefox 下 css 加载失败了，于是就没隐藏到~

0x0001

hsxfjames 我先临时隐藏一个吧，明天再提交下代码 = =

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