parallel lines and arc of circle

Hi,

I have two basic questions :

I did not found how to code the following two math expressions with 
(presentation) mathml :
1) In basic geometry, when two lines, say (AB) and (CD), are parallel 
lines, i write (AB)//(CD).
How do i code the symbol // (at the moment i use // but i don't 
think it is the right way, is it ?).
2) How to denote the arc of a circle ? Let A,B be two points on a 
circle. How do i get AB rendered with a little arc over it (which 
accent to use ?) ? More precisely :
<mover accent="true">
  <mrow>
    <mi> A </mi>
    <mi> B </mi>
  </mrow>
  <mo> ??? </mo>
</mover>


Well, these are basic questions !
Thanks a lot,
Stephan

Received on Friday, 6 February 2004 08:10:28 UTC