rec-lambda2

lambda integral f(x)dx

W3C sample	WIRIS
	$b\mapsto \int_a^b f(x)\,d x$

<math xmlns="http://www.w3.org/1998/Math/MathML">
  <lambda>
    <bvar>
      <ci>b</ci>
    </bvar>
    <apply>
      <int/>
      <bvar>
        <ci>x</ci>
      </bvar>
      <lowlimit>
        <ci>a</ci>
      </lowlimit>
      <uplimit>
        <ci>b</ci>
      </uplimit>
      <apply>
        <fn>
          <ci>f</ci>
        </fn>
        <ci>x</ci>
      </apply>
    </apply>
  </lambda>
</math>

Author: MathML 2 Recommendation