Two comments on targeted canonical derandomizers

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

Abstract

We revisit the notion of a targeted canonical derandomizer, introduced in our prior work (ECCC, TR10-135) as a uniform notion of a pseudorandom generator that suffices for yielding BPP=P. The original notion was derived (as a variant of the standard notion of a canonical derandomizer) by providing both the distinguisher and the generator with the same auxiliary-input. Here we take one step further and consider pseudorandom generators that fool a single circuit that is given to both (the distinguisher and the generator) as auxiliary input. Building on the aforementioned prior work, we show that such pseudorandom generators of constant seed length exist if and only if BPP=P, which means that they exist if and only if the previously defined targeted canonical derandomizers (of exponential stretch, as in the prior work) exist. We also relate such targeted canonical derandomizer to targeted hitters, which are the analogous canonical derandomizers for RP.

Original languageEnglish
Title of host publicationComputational Complexity and Property Testing
Subtitle of host publicationOn the Interplay Between Randomness and Computation
EditorsOded Goldreich
PublisherSpringer Verlag
Chapter4
Pages24-35
Number of pages12
DOIs
StatePublished - 4 Apr 2020

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume12050 LNCS

All Science Journal Classification (ASJC) codes

  • Theoretical Computer Science
  • General Computer Science

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