delta function
type: Concept
preferred label: تابع دلتا @fa
related: Sommerfeld radiation condition

Helmholtz differential equation
type: Concept
preferred label: معادله دیفرانسیل هِلمهولتس @fa
related: Sommerfeld radiation condition

Sommerfeld radiation condition
type: Concept
broader: radiation condition
preferred label: شرط تابش سومرفلد @fa
related: Euclidean norm
related: delta function
related: Helmholtz differential equation

radiation condition
type: Concept
narrower: Sommerfeld radiation condition
preferred label: شرط تابش @fa

Euclidean norm
type: Concept
preferred label: نرم اقلیدسی @fa
related: Sommerfeld radiation condition