set5

set of sets

W3C sample	WIRIS
	$\{\{a, d\}, \{x, y, z\}, \{0, 2, 6, 8, 9\}\}$

<math xmlns="http://www.w3.org/1998/Math/MathML">
  <set>
    <set>
      <ci>a</ci>
      <ci>d</ci>
    </set>
    <set>
      <ci>x</ci>
      <ci>y</ci>
      <ci>z</ci>
    </set>
    <set>
      <cn>0</cn>
      <cn>2</cn>
      <cn>6</cn>
      <cn>8</cn>
      <cn>9</cn>
    </set>
  </set>
</math>

Author: Design Science, Inc. (E. Cannon, E. Tabacman, R.Miner)