# Christoffel–Darboux formula

> identity for a sequence of orthogonal polynomials by E. Christoffel and J. Darboux

**Wikidata**: [Q5111650](https://www.wikidata.org/wiki/Q5111650)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Christoffel–Darboux_formula)  
**Source**: https://4ort.xyz/entity/christoffel-darboux-formula