Definition df-inl 9826

Description: Left injection of a disjoint union. (Contributed by Mario Carneiro, 21-Jun-2022.)

Assertion

Ref	Expression
df-inl	⊢ inl = (𝑥 ∈ V ↦ ⟨∅, 𝑥⟩)

Detailed syntax breakdown of Definition df-inl

Step	Hyp	Ref	Expression
1		cinl 9823	. 2 class inl
2		vx	. . 3 setvar 𝑥
3		cvv 3442	. . 3 class V
4		c0 4287	. . . 4 class ∅
5	2	cv 1541	. . . 4 class 𝑥
6	4, 5	cop 4588	. . 3 class ⟨∅, 𝑥⟩
7	2, 3, 6	cmpt 5181	. 2 class (𝑥 ∈ V ↦ ⟨∅, 𝑥⟩)
8	1, 7	wceq 1542	1 wff inl = (𝑥 ∈ V ↦ ⟨∅, 𝑥⟩)

This definition is referenced by:  djulcl  9834  djulf1o  9836  inlresf  9838  djur  9843  djuss  9844  djuun  9850  1stinl  9851  2ndinl  9852