English

Quadratic Harnesses, q-commutations, and orthogonal martingale polynomials

Probability 2007-11-27 v1 Mathematical Physics math.MP

Abstract

We introduce the quadratic harness condition and show that integrable quadratic harnesses have orthogonal martingale polynomials with a three step recurrence that satisfies a q-commutation relation. This implies that quadratic harnesses are essentially determined uniquely by five numerical constants. Explicit recurrences for the orthogonal martingale polynomials are derived in several cases of interest.

Keywords

Cite

@article{arxiv.math/0504194,
  title  = {Quadratic Harnesses, q-commutations, and orthogonal martingale polynomials},
  author = {Wlodzimierz Bryc and Wojciech Matysiak and Jacek Wesolowski},
  journal= {arXiv preprint arXiv:math/0504194},
  year   = {2007}
}
R2 v1 2026-07-22T17:17:56.514Z