使用MathJax生成Sigma的问题(1次成功和1次失败)

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问题描述

因此，我尝试使用类似于

So I am trying to generate a lower case sigma using a HTML code similar to

<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width">
    <title>MathJax example</title>
    <script type="text/javascript" async src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/latest.js?config=TeX-MML-AM_CHTML" async>
    </script>
</head>

<body>
    <p id="This_Is_What_I_Want"> $$ \sigma^2 $$</p>
    <p id="Output"></p>
    <p id="Activate"><button onclick="RUN()">Test This out</button></p>
    <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js?config=TeX-AMS_HTML,http://myserver.com/MathJax/config/local/local.js">
        function RUN() {
            document.getElementById("Output").innerHTML = "$$ \sigma^2 $$";
            MathJax.Hub.Queue(["Typeset", MathJax.Hub]);
        }
    </script>
</body>

第一个sigma正确加载，但是当我按下按钮时，第二个sigma无法正确加载

The first sigma loads correctly but when I hit the button the second one will not load correctly

推荐答案

<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width">
    <title>MathJax example</title>
    <script type="text/javascript" async src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/latest.js?config=TeX-MML-AM_CHTML" async>
    </script>
</head>

<body>
    <p id="This_Is_What_I_Want"> $$ \sigma^2 $$</p>
    <p id="Output"></p>
    <p id="Activate"><button onclick="RUN()">Test This out</button></p>
    <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js?config=TeX-AMS_HTML,http://myserver.com/MathJax/config/local/local.js">
        function RUN() {
            document.getElementById("Output").innerHTML = "$$ \\sigma^2 $$";
            MathJax.Hub.Queue(["Typeset", MathJax.Hub]);
        }
    </script>
</body>

显然我没有阅读文档中的说明，但是默认情况是您需要两个\而不是一个

apparently I did not read instructions on the documentation but the default is you need two \ as opposed to one

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