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Date: Thu, 21 Nov 1996 20:14:39 GMT
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Last-modified: Mon, 27 Mar 1995 17:25:09 GMT
<HTML><HEAD><title>Research Interests: Laszlo Babai</title></HEAD><BODY><h1>Laszlo Babai</h1><hr> My fields of interest include computational complexity theory,algorithms, combinatorics, and finite groups. Randomization plays a rolein each area.<p> A major recent result, obtained in collaboration with Lance Fortnow,our former graduate students Carsten Lund (Ph.D. '91) and Mario Szegedy(Ph.D. '89), and Leonid Levin of Boston University, is the invention of"transparent proofs," proofs one can verify by a small number of spotchecks.We have shown that all formal mathematical proofs can be transformed intotransparent form. The result and its subsequent refinements have foundapplications in areas as seemingly remote as approximate discrete optimization(e.g., nearly optimal traveling salesman routing).<P> In joint work with graduate student Bob Beals (Ph.D. '93), we havefound Monte Carlo algorithms with guaranteed performance bounds to findstructural elements of matrix groups (given by a list of generators). Thework involves methods from group theory, combinatorics, and probabilitytheory (Markov chains).<P> I have been studying group actions on graphs. A recent resultprovides an asymptotic classification of finite vertex-symmetric graphswith an excluded minor, using connections to hyperbolic geometry.<P><hr><!WA0><a href="http://cs-www.uchicago.edu/info/admin/html/faculty-research.html"><!WA1><img align=middle src="http://cs-www.uchicago.edu/images/directional/back32x32.gif" border=0 ALT="Faculty Interests"> Back to faculty interests home page.</a><!WA2><a href="http://cs-www.uchicago.edu/"><!WA3><img align=middlesrc="http://cs-www.uchicago.edu/images/buttons/text/cshome-button.gif" border=0 ALT="Home"></a><!WA4><a href="http://cs-www.uchicago.edu/info/admin/html/people.html"><!WA5><img align=middlesrc="http://cs-www.uchicago.edu/images/buttons/text/people-button.gif" border=0 ALT="People"></a><!WA6><a href="http://cs-www.uchicago.edu/html/groups/theory"><!WA7><img align=middlesrc="http://cs-www.uchicago.edu/images/buttons/text/theory-button.gif" border=0 ALT="Theory"></a><hr><!-- hhmts start -->Last modified: Mon Mar 27 11:25:07 1995<!-- hhmts end --><address>millard@cs.uchicago.edu</address></BODY></HTML>
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