<article xmlns:mml="http://www.w3.org/1998/Math/MathML">
  <front>
    <article-meta>
      <title-group>
        <article-title>Math Test</article-title>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author">
          <name>
            <surname>!</surname>
          </name>
        </contrib>
      </contrib-group>
      <abstract>
        <p>!</p>
      </abstract>
    </article-meta>
  </front>
  <article-body>
    <section id="notation">
      <h2>Notation</h2>
      <ul>
        <li>
          <p>"<inline-formula>
              <alternatives>
                <tex-math>\operatorname{dom}f</tex-math>
              </alternatives>
            </inline-formula>" denotes the domain of function <inline-formula>
              <alternatives>
                <tex-math>f</tex-math>
              </alternatives>
            </inline-formula></p>
        </li>
        <li>
          <p>"<inline-formula>
              <alternatives>
                <tex-math>&#10214; x \in S &#10215;</tex-math>
              </alternatives>
            </inline-formula>" is Iverson bracket notation for the indicator function of <inline-formula>
              <alternatives>
                <tex-math>S</tex-math>
                <mml:math display="inline"><mml:mi>S</mml:mi></mml:math>
              </alternatives>
            </inline-formula>, namely
          </p>
          <disp-formula>
            <alternatives>
              <tex-math>&#10214; x \in S &#10215; =
                  \begin{cases}
                    1 &amp; \text{if } x \in S  \\
                    0 &amp; \text{otherwise.}
                  \end{cases}</tex-math>
            </alternatives>
          </disp-formula>
          <p> </p>
        </li>
      </ul>
    </section>
  </article-body>
</article>
