English

Uniform Approximation by (Quantum) Polynomials

Quantum Physics 2011-03-15 v3

Abstract

We show that quantum algorithms can be used to re-prove a classical theorem in approximation theory, Jackson's Theorem, which gives a nearly-optimal quantitative version of Weierstrass's Theorem on uniform approximation of continuous functions by polynomials. We provide two proofs, based respectively on quantum counting and on quantum phase estimation.

Keywords

Cite

@article{arxiv.1008.1599,
  title  = {Uniform Approximation by (Quantum) Polynomials},
  author = {Andrew Drucker and Ronald de Wolf},
  journal= {arXiv preprint arXiv:1008.1599},
  year   = {2011}
}

Comments

9 pages; minor improvements based on journal version; http://www.rintonpress.com/journals/qiconline.html#v11n34

R2 v1 2026-06-21T15:58:47.875Z