Theorem disjeqi 39465

Description: Equality theorem for disjoints, inference version. (Contributed by Peter Mazsa, 22-Sep-2021.)

Hypothesis

Ref	Expression
disjeqi.1	⊢ 𝐴 = 𝐵

Assertion

Ref	Expression
disjeqi	⊢ ( Disj 𝐴 ↔ Disj 𝐵)

Proof of Theorem disjeqi

Step	Hyp	Ref	Expression
1		disjeqi.1	. 2 ⊢ 𝐴 = 𝐵
2		disjeq 39464	. 2 ⊢ (𝐴 = 𝐵 → ( Disj 𝐴 ↔ Disj 𝐵))
3	1, 2	ax-mp 5	1 ⊢ ( Disj 𝐴 ↔ Disj 𝐵)

Syntax hints:   ↔ wb 209   = wceq 1570   Disj wdisjALTV 38849

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1825  ax-4 1839  ax-5 1940  ax-6 1997  ax-7 2038  ax-8 2145  ax-9 2153  ax-11 2192  ax-ext 2735  ax-sep 5258  ax-pr 5406

This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1810  df-sb 2097  df-clab 2742  df-cleq 2755  df-clel 2838  df-ral 3080  df-rex 3090  df-rab 3417  df-v 3457  df-dif 3909  df-un 3911  df-in 3913  df-ss 3923  df-nul 4288  df-if 4489  df-sn 4591  df-pr 4593  df-op 4597  df-br 5111  df-opab 5175  df-id 5558  df-xp 5669  df-rel 5670  df-cnv 5671  df-co 5672  df-dm 5673  df-rn 5674  df-res 5675  df-coss 39131  df-cnvrefrel 39237  df-funALTV 39397  df-disjALTV 39420

This theorem is referenced by:  disjxrnres5  39477  disjsuc  39489