Theorem eltrans 34172

Description: Membership in the class of all transitive sets. (Contributed by Scott Fenton, 31-Mar-2012.)

Hypothesis

Ref	Expression
eltrans.1	⊢ 𝐴 ∈ V

Assertion

Ref	Expression
eltrans	⊢ (𝐴 ∈ Trans ↔ Tr 𝐴)

Proof of Theorem eltrans

Step	Hyp	Ref	Expression
1		df-trans 34138	. . 3 ⊢ Trans = (V ∖ ran (( E ∘ E ) ∖ E ))
2	1	eleq2i 2831	. 2 ⊢ (𝐴 ∈ Trans ↔ 𝐴 ∈ (V ∖ ran (( E ∘ E ) ∖ E )))
3		eltrans.1	. . 3 ⊢ 𝐴 ∈ V
4	3	dftr6 33697	. 2 ⊢ (Tr 𝐴 ↔ 𝐴 ∈ (V ∖ ran (( E ∘ E ) ∖ E )))
5	2, 4	bitr4i 277	1 ⊢ (𝐴 ∈ Trans ↔ Tr 𝐴)

Syntax hints:   ↔ wb 205   ∈ wcel 2109  Vcvv 3430   ∖ cdif 3888  Tr wtr 5195   E cep 5493  ran crn 5589   ∘ ccom 5592   Trans ctrans 34114

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1801  ax-4 1815  ax-5 1916  ax-6 1974  ax-7 2014  ax-8 2111  ax-9 2119  ax-ext 2710  ax-sep 5226  ax-nul 5233  ax-pr 5355

This theorem depends on definitions:  df-bi 206  df-an 396  df-or 844  df-3an 1087  df-tru 1544  df-fal 1554  df-ex 1786  df-sb 2071  df-clab 2717  df-cleq 2731  df-clel 2817  df-ne 2945  df-rab 3074  df-v 3432  df-dif 3894  df-un 3896  df-in 3898  df-ss 3908  df-nul 4262  df-if 4465  df-sn 4567  df-pr 4569  df-op 4573  df-uni 4845  df-br 5079  df-opab 5141  df-tr 5196  df-eprel 5494  df-cnv 5596  df-co 5597  df-dm 5598  df-rn 5599  df-trans 34138

This theorem is referenced by:  dfon3  34173