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@faceless2
Created August 23, 2020 14:38
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MathML with font-size
<math display="block" xmlns="http://www.w3.org/1998/Math/MathML">
<mrow>
<mfenced>
<mtable>
<mtr>
<mtd>
<mfenced>
<mtable>
<mtr>
<mtd>
<msub>
<mi>a</mi>
<mn>1</mn>
</msub>
</mtd>
<mtd>
<msub>
<mi>a</mi>
<mn>2</mn>
</msub>
</mtd>
<mtd>
<msub>
<mi>a</mi>
<mn>3</mn>
</msub>
</mtd>
<mtd>
<msub>
<mi>a</mi>
<mn>4</mn>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mi>a</mi>
<mn>5</mn>
</msub>
</mtd>
<mtd>
<msub>
<mi>a</mi>
<mn>6</mn>
</msub>
</mtd>
<mtd>
<msub>
<mi>a</mi>
<mn>7</mn>
</msub>
</mtd>
<mtd>
<msub>
<mi>a</mi>
<mn>8</mn>
</msub>
</mtd>
</mtr>
</mtable>
</mfenced>
</mtd>
<mtd rowspan="2">
<mfenced>
<mtable>
<mtr>
<mtd>
<msub>
<mi>b</mi>
<mn>1</mn>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mi>b</mi>
<mn>2</mn>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mi>b</mi>
<mn>3</mn>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mi>b</mi>
<mn>4</mn>
</msub>
</mtd>
</mtr>
</mtable>
</mfenced>
</mtd>
</mtr>
<mtr>
<mtd>
<mtable>
<mtr>
<mtd>
<mspace width="1.25em"></mspace>
<mn style="font-size: 1.5em">0</mn>
<mi> </mi>
</mtd>
<mtd>
<mfenced>
<mtable>
<mtr>
<mtd>
<msub>
<mi>c</mi>
<mn>1</mn>
</msub>
</mtd>
<mtd>
<msub>
<mi>c</mi>
<mn>2</mn>
</msub>
</mtd>
</mtr>
<mtr>
<mtd>
<msub>
<mi>c</mi>
<mn>3</mn>
</msub>
</mtd>
<mtd>
<msub>
<mi>c</mi>
<mn>4</mn>
</msub>
</mtd>
</mtr>
</mtable>
</mfenced>
</mtd>
</mtr>
</mtable>
</mtd>
</mtr>
</mtable>
</mfenced>
</mrow>
</math>
@fred-wang
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This is font-size on a token element with no nodes inside, so that's ok the interpretation of scriptlevel below it does not matter. There is also no font-size: scriptlevel() rules on that element applying AFAIK, but in any case MathML3 / Core says font-size would win and one can always wrap the element into an additional mrow if they want to keep the scriptlevel change.

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