rec-naturalnumbers1

natural numbers

W3C sample	WIRIS
	$1729\in \mathbb{N}$

<math xmlns="http://www.w3.org/1998/Math/MathML">
  <apply>
    <in/>
    <cn type="integer">1729</cn>
    <naturalnumbers/>
  </apply>
</math>

Author: MathML 2 Recommendation