Definition df-succl 38492

Description: Define Suc as the class of all successors, i.e. the range of the successor map: 𝑛 ∈ Suc iff ∃𝑚suc 𝑚 = 𝑛 (see dfsuccl2 38493). By injectivity of suc (suc11reg 9509), every 𝑛 ∈ Suc has at most one predecessor, which is exactly what pre 𝑛 (df-pre 38498) names. Cf. dfsuccl3 38496 and dfsuccl4 38497. (Contributed by Peter Mazsa, 25-Jan-2026.)

Assertion

Ref	Expression
df-succl	⊢ Suc = ran SucMap

Detailed syntax breakdown of Definition df-succl

Step	Hyp	Ref	Expression
1		csuccl 38228	. 2 class Suc
2		csucmap 38227	. . 3 class SucMap
3	2	crn 5615	. 2 class ran SucMap
4	1, 3	wceq 1541	1 wff Suc = ran SucMap

This definition is referenced by:  dfsuccl2  38493  eupre  38516  sucpre  38519  presuc  38520