## Theory of Combinatorial Algorithms

Prof. Emo Welzl and Prof. Bernd Gärtner

# Mittagsseminar (in cooperation with M. Ghaffari, A. Steger and B. Sudakov)

 Mittagsseminar Talk Information

Date and Time: Wednesday, March 23, 2011, 12:15 pm

Duration: This information is not available in the database

Location: CAB G51

Speaker: Ramamohan Paturi (UC San Diego)

## Sparsification lemma

In this talk, I will present a lemma which shows that, for any fixed \epsilon > 0, an arbitrary k-CNF formula can be represented as a disjunction of 2^{\epsilon n} k-CNF formulas that are sparse, that is, each has O(n) clauses. I will discuss the motivation for the lemma and mention its key applications.

Joint work with R. Impagliazzo and F. Zane .

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