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<html>
  <head>
    <meta charset="utf-8"/>
    <title>Spacing of empty and three-char operators</title>
    <link rel="help" href="https://w3c.github.io/mathml-core/#operator-fence-separator-or-accent-mo">
    <link rel="help" href="https://w3c.github.io/mathml-core/#operator-dictionary">
    <meta name="assert" content="Verifies that empty and three-char operators use the default spacing.">
    <link rel="match" href="operator-dictionary-empty-and-three-chars-ref.html">
    <link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
    <style>
      math {
        font: 50px/1 Ahem;
      }
      mn:first-child {
        color: blue;
      }
      mn:last-child {
        color: yellow;
      }
    </style>
  </head>
  <body>

    <p><math><mn>_</mn><mo lspace="0.2777777777777778em" rspace="0.2777777777777778em">_</mo><mn>_</mn></math></p>

    <p>The spacing after the blue squares and before the yellow squares should be the same as the above reference:</p>

    <p><math><mn>_</mn><mo><!-- empty --></mo><mn>_</mn></math></p>
    <p><math><mn>_</mn><mo>...</mo><mn>_</mn></math></p>
    <p><math><mn>_</mn><mo>lim</mo><mn>_</mn></math>
    <p><math><mn>_</mn><mo>max</mo><mn>_</mn></math>
    <p><math><mn>_</mn><mo>min</mo><mn>_</mn></math>
    <p><math><mn>_</mn><mo>|||</mo><mn>_</mn></math>

    <script src="/mathml/support/feature-detection.js"></script>
    <script>MathMLFeatureDetection.ensure_for_match_reftest("has_operator_spacing");</script>
  </body>
</html>
