pi number
preferred label: عدد پی @fa
type: Concept
related: Plank formula

exponential function
preferred label: تابع نمایی @fa
type: Concept
related: Plank formula

Plank formula
related: pi number
related: exponential function
broader: quantum theory
preferred label: فرمول پلانک @fa
type: Concept

quantum theory
preferred label: نظریه کوانتومی @fa
type: Concept
narrower: Plank formula