Communication Lower Bounds Using Dual Polynomials

  title={Communication Lower Bounds Using Dual Polynomials},
  author={Alexander A. Sherstov},
  journal={Bulletin of the EATCS},
Representations of Boolean functions by real polynomials play an important role in complexity theory. Typically, one is interested in the least degree of a polynomial p(x1, . . . , xn) that approximates or sign-represents a given Boolean function f (x1, . . . , xn). This article surveys a new and growing body of work in communication complexity that centers around the dual objects, i.e., polynomials that certify the difficulty of approximating or signrepresenting a given function. We provide a… CONTINUE READING