Recurrence relations and the Christoffel–Darboux formula for a special class of elliptic orthogonal polynomials

Journal article

In recent years, there has been significant progress in the theory of orthogonal polynomials on algebraic curves, particularly on genus 1 surfaces. In this paper, we focus on elliptic orthogonal polynomials and establish several of their fundamental properties. In particular, we derive general five-term and seven-term recurrence relations, which lead to a Christoffel–Darboux formula and the construction of an associated point process on the A-cycle of the torus. Notably, the recurrence coefficients in these relations are intricately linked through the underlying elliptic curve equation. Under additional symmetry assumptions on the weight function, the structure simplifies considerably, recovering known results for orthogonal polynomials on the complex plane.

Authors: Desiraju, H; Lahiry, S

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: IOP Publishing
• Journal: Journal of Physics A: Mathematical and Theoretical
• Volume: 59
• Issue: 23
• Pages: 235203
• Article number: 235203
• Publication date: 2026-06-10
• Acceptance date: 2026-05-22
• DOI: 10.1088/1751-8121/ae7227
• EISSN: 1751-8121
• ISSN: 1751-8113
• Language: English
• Keywords: recurrence relation; elliptic curve; orthogonal polynomials; Christoffel–Darboux formula