This is an inofficial mirror of http://metamath.tirix.org for personal testing of a visualizer extension only.

Metamath Proof Explorer

Syntax definition cmpo

Description: Extend the definition of a class to include maps-to notation for defining an operation via a rule.

		Ref	Expression
	Assertion	cmpo	class ( 𝑥 ∈ 𝐴 , 𝑦 ∈ 𝐵 ↦ 𝐶 )