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On the Influences of Variables on Boolean Functions in Product Spaces

Published online by Cambridge University Press:  09 July 2010

NATHAN KELLER
NATHAN KELLER*
Affiliation:
Einstein Institute of Mathematics, Hebrew University, Jerusalem 91904, Israel (e-mail: nkeller@math.huji.ac.il)
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Abstract

In this paper we consider the influences of variables on Boolean functions in general product spaces. Unlike the case of functions on the discrete cube, where there is a clear definition of influence, in the general case several definitions have been presented in different papers. We propose a family of definitions for the influence that contains all the known definitions, as well as other natural definitions, as special cases. We show that the proofs of the BKKKL theorem and of other results can be adapted to our new definition. The adaptation leads to generalizations of these theorems, which are tight in terms of the definition of influence used in the assertion.

Type
Paper
Information
Combinatorics, Probability and Computing , Volume 20 , Issue 1 , January 2011 , pp. 83 - 102
Copyright
Copyright © Cambridge University Press 2010

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