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Re: Combinatorial numbers

From: David Carlisle <davidc@nag.co.uk>
Date: Tue, 8 Apr 2003 20:37:10 +0100
Message-Id: <200304081937.UAA09746@e3000>
To: info@mathsformore.com
CC: www-math@w3.org


I'm not sure quite what you mean by combinatorial numbers?
Do you mean "n choose m" notations for the number of combinations
choosing m items from n, if sothere's an example to get
(m)
(n)
notation using mfrac in the mathml spec in chapter 3.
<mrow>
   <mo> ( </mo>
   <mfrac linethickness="0">
      <mi> a </mi>
      <mi> b </mi>
   </mfrac>
   <mo> ) </mo>
</mrow>


If you want the 
  m
C
  n

notation you would use msubsup with a C in the base.

There is no standard Content MathML element for this, but you could use 
<csymbol>choose</csymbol>
together with a stylesheet or mathml semantics element specifying one of
the above presentation mathml forms for display.

David
Received on Tuesday, 8 April 2003 15:37:27 GMT

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