7.3 Math Environments

Display math enclosed in double dollar signs ($$...$$), but note that

• the dollar signs ($$) should not appear on separate lines
• No space between $$ and the math content

This won't work:
$$
E = mc^2
$$

This will work:
$$E = mc^2$$

In html tags, math should be enclosed in \( ... \) for inline math and \[ ... \] for display math.

• If using $...$, there are backticks surrounding the math after rendering…

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7.3.1 Color equations

1. In mathjax configuration file, define color macros, e.g., in libs/mathjax.html:

   <!-- MathJax V2 Configuration -->
   <script type="text/x-mathjax-config">
   MathJax.Hub.Config({
     TeX: {
       extensions: ["color.js"], // load the color extension, support color names, RGB, and grey-scale color spaces
       equationNumbers: { autoNumber: "AMS" }, // use ams rules to number equations
       Macros: {
         // define colors
         red: ["{\\color[RGB]{185,64,71}{#1}}", 1],
       }
     }
   });
   </script>

2. In your slide, you can use the macros, e.g., \red{...}, \blue{...}, etc.

   $$\red{Y_t} \equiv I_tI_{t-1} + (1-I_t)(1-I_{t-1})$$

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