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<html xmlns="http://www.w3.org/1999/xhtml" xmlns:m="http://www.w3.org/1998/Math/MathML">
<body>
<!-- Test interactions between CSS font-size and scriptlevel changes -->
<p><m:math><m:mstyle scriptlevel="0" scriptsizemultiplier="0.5" scriptminsize="18px" style="font-size:48px;">
  <m:mstyle scriptlevel="+5"><m:mi>Id</m:mi></m:mstyle>
  <!-- Test that we can explicitly go below scriptminsize -->
  <m:mi style="font-size:10px;">Id</m:mi>
  <!-- Test that a relative font-size ignores the scriptlevel change in the same element -->
  <m:mstyle scriptlevel="+5" style="font-size:100%;"><m:mi>Id</m:mi></m:mstyle>
</m:mstyle></m:math></p>

<p><m:math><m:mstyle scriptlevel="0" scriptsizemultiplier="0.5" scriptminsize="18px" style="font-size:48px;">
  <!-- Test that scriptlevel changes are incremental (this should be 24px) -->
  <m:mstyle scriptlevel="+1" style="font-size:48px;"><m:mstyle scriptlevel="+1"><m:mi>Id</m:mi></m:mstyle></m:mstyle>
</m:mstyle></m:math></p>

<p><m:math><m:mstyle scriptlevel="0" scriptsizemultiplier="0.5" scriptminsize="18px" style="font-size:48px;">
  <!-- Decreasing the font size due to a scriptlevel change should do nothing when we're below minscriptsize -->
  <m:mstyle style="font-size:10px;"><m:mstyle scriptlevel="+1"><m:mi>Id</m:mi></m:mstyle></m:mstyle>
  <!-- but we can increase -->
  <m:mstyle style="font-size:10px;"><m:mstyle scriptlevel="-1"><m:mi>Id</m:mi></m:mstyle></m:mstyle>
  <m:mstyle style="font-size:10px;"><m:mstyle scriptlevel="-2"><m:mi>Id</m:mi></m:mstyle></m:mstyle>
</m:mstyle></m:math></p>

<p><m:math><m:mstyle scriptlevel="0" scriptsizemultiplier="0.5" scriptminsize="18px" style="font-size:48px;">
  <!-- An absolute font-size value resets the unconstrained size to that value, so we
       can increase above that value with a negative scriptlevel change -->
  <m:mstyle scriptlevel="+5"><m:mstyle style="font-size:24px;"><m:mstyle scriptlevel="-1"><m:mi>Id</m:mi></m:mstyle></m:mstyle></m:mstyle>
  <!-- A relative font-size value resets the unconstrained to that value, resolved relative to the constrained size -->
  <m:mstyle scriptlevel="+2"><m:mstyle style="font-size:200%;"><m:mstyle scriptlevel="-1"><m:mi>Id</m:mi></m:mstyle></m:mstyle></m:mstyle>
  <!-- The unconstrained size does not cap the font size to below scriptminsize (so this is 18px) -->
  <m:mstyle scriptlevel="+2"><m:mstyle style="font-size:50%;"><m:mstyle scriptlevel="-1"><m:mi>Id</m:mi></m:mstyle></m:mstyle></m:mstyle>
</m:mstyle></m:math></p>

</body>
</html>