Extractors for varieties

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

We study the task of randomness extraction from sources that are distributed uniformly on an unknown algebraic variety. In other words, we are interested in constructing a function (an extractor) whose output is close to uniform even if the input is drawn uniformly from the set of solutions of an unknown system of low degree polynomials. This problem generalizes the problem of extraction from affine sources which has drawn a considerable amount of interest lately. We present two constructions of explicit extractors for varieties. The first works for varieties of any size (including one-dimensional varieties or curves) and requires field size that is exponential in the overall dimension of the space. Our second extractor allows the field size to be polynomial in the degree of the equations defining the variety, but works only for varieties whose size is at least the square root of the total size of the space.

Original languageEnglish (US)
Pages (from-to)515-572
Number of pages58
JournalComputational Complexity
Volume21
Issue number4
DOIs
StatePublished - Oct 1 2012

All Science Journal Classification (ASJC) codes

  • Theoretical Computer Science
  • Mathematics(all)
  • Computational Theory and Mathematics
  • Computational Mathematics

Keywords

  • Deterministic extractors
  • algebraic geometry

Fingerprint Dive into the research topics of 'Extractors for varieties'. Together they form a unique fingerprint.

Cite this