Theorem f1relOLD 6813

Description: Obsolete version of f1rel 6812 as of 10-Jun-2026. (Contributed by NM, 8-Mar-2014.) (Proof modification is discouraged.) (New usage is discouraged.)

Assertion

Ref	Expression
f1relOLD	⊢ (𝐹:𝐴⟶1-1𝐵 → Rel 𝐹)

Proof of Theorem f1relOLD

Step	Hyp	Ref	Expression
1		f1fn 6809	. 2 ⊢ (𝐹:𝐴⟶1-1𝐵 → 𝐹 Fn 𝐴)
2		fnrel 6671	. 2 ⊢ (𝐹 Fn 𝐴 → Rel 𝐹)
3	1, 2	syl 18	1 ⊢ (𝐹:𝐴⟶1-1𝐵 → Rel 𝐹)

This proof depends on syntax axioms:   → wi 4  Rel wrel 5663   Fn wfn 6561  ⟶1-1wf1 6563

This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8

This proof depends on definitions:  df-bi 210  df-an 402  df-fun 6568  df-fn 6569  df-f 6570  df-f1 6571

This theorem is used by: (None)