Symmetric Alternation Captures BPP

We introduce the natural class Sp2 containing those languages which may be expressed in terms of two symmetric quantifiers. This class lies between ? and ? and naturally generates a "symmetric" hierarchy corresponding to the polynomial-time hierarchy. We demonstrate, using the probabilist...

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Bibliographic Details
Main Authors: Russell, Alexander, Sundaram, Ravi
Published: 2023
Online Access:https://hdl.handle.net/1721.1/149253
Description
Summary:We introduce the natural class Sp2 containing those languages which may be expressed in terms of two symmetric quantifiers. This class lies between ? and ? and naturally generates a "symmetric" hierarchy corresponding to the polynomial-time hierarchy. We demonstrate, using the probabilistic method, new containment theorems for BPP.