Or Zamir:Faster k-SAT Algorithms Using Biased-PPSZ

Wednesday, September 18, 2019 - 4:00pm to 5:00pm
Location: 
32-G575
Speaker: 
Or Zamir
Biography: 
Tel Aviv University
The PPSZ algorithm, due to Paturi, Pudlak, Saks and Zane, is currently the fastest known algorithm for the k-SAT problem, for every k>3. For 3-SAT, a tiny improvement over PPSZ was obtained by Hertli. We introduce a biased version of the PPSZ algorithm using which we obtain an improvement over PPSZ for every k≥3. For k=3 we also improve on Herli’s result and get a much more noticeable improvement over PPSZ, though still relatively small. In particular, for Unique 3-SAT, we improve the current bound from 1.308^n to 1.307^n.
 
(Joint work with Thomas Dueholm Hansen, Haim Kaplan and Uri Zwick)