Bessel function of the first kind
type: Concept
preferred label: تابع بسل نوع اول @fa
related: Lommel polynomial

Lommel polynomial
type: Concept
broader: Lommel differential equation
preferred label: چندجمله‌ای لومل @fa
related: Bessel function of the first kind

Lommel differential equation
type: Concept
narrower: Lommel polynomial
preferred label: معادله دیفرانسیل لومل @fa