<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>MathML lengths</title>
<link rel="help" href="https://w3c.github.io/mathml-core/#css-styling">
<link rel="help" href="https://w3c.github.io/mathml-core/#types-for-mathml-attribute-values">
<link rel="help" href="https://w3c.github.io/mathml-core/#legacy-mathml-style-attributes">
<link rel="help" href="https://w3c.github.io/mathml-core/#space-mspace">
<link rel="help" href="https://www.w3.org/TR/css-values-4/#relative-lengths">
<link rel="match" hr