--- a/web/index.shtml
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 <tr><td class="entry">
+2010-06-21:
+<a href="entries/Category2.shtml">Category Theory</a>
+<br>Author: Alexander Katovsky
+</td></tr>
+
+<tr><td class="entry">
 2010-06-17:
 <a href="entries/Matrix.shtml">Executable Matrix Operations on Matrices of Arbitrary Dimensions</a>
 <br>Author: Christian Sternagel and Ren&eacute; Thiemann