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Anonymous committed 2f4a5f7

Fixed some validation problems in disco_circle.

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t2/MathVentures/disco_circle.html.wml

 If we can traverse this drawing, so that every link is drawn once,
 and the pencil is not lifted off the paper, then we found a dancing
 order that satistfies the request. In mathematical terminology a
-drawing with lines and circles is commonly called a <B>"Graph"</B>, and
-the field of mathemtics that deals with graphs is called <B>Graph
-Theory</B>.
+drawing with lines and circles is commonly called a <b>"Graph"</b>, and
+the field of mathemtics that deals with graphs is called <b>Graph
+Theory</b>.
 </p>
 
 <p>
 In our case, it's obvious that the number of links for every girl is
 equal to the number of boys and vice versa. Thus, to have an even
 number of links that emerge from every circle, we will need to have an
-even number of boys <B>and</B> an even number of girls. Plus, if there
+even number of boys <b>and</b> an even number of girls. Plus, if there
 are two boys and an uneven number of girls, we'll still get a graph
 with only two circles having an uneven number of links. (and likewise
 for two girls and an uneven number of boys).
 
 <h3><a href="./">Back to the Math-Ventures web page</a></h3>
 
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