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Theorem dfse3 6338
Description: Alternate definition of set-like relationships. (Contributed by Scott Fenton, 19-Aug-2024.)
Assertion
Ref Expression
dfse3 (𝑅 Se 𝐴 ↔ ∀𝑥 ∈ 𝐴 Pred(𝑅, 𝐴, 𝑥) ∈ V)
Distinct variable groups:   𝑥,𝐴   𝑥,𝑅

Proof of Theorem dfse3
StepHypRef Expression
1 dfse2 6098 . 2 (𝑅 Se 𝐴 ↔ ∀𝑥 ∈ 𝐴 (𝐴 ∩ (◡𝑅 “ {𝑥})) ∈ V)
2 df-pred 6303 . . . 4 Pred(𝑅, 𝐴, 𝑥) = (𝐴 ∩ (◡𝑅 “ {𝑥}))
32eleq1i 2852 . . 3 (Pred(𝑅, 𝐴, 𝑥) ∈ V ↔ (𝐴 ∩ (◡𝑅 “ {𝑥})) ∈ V)
43ralbii 3109 . 2 (∀𝑥 ∈ 𝐴 Pred(𝑅, 𝐴, 𝑥) ∈ V ↔ ∀𝑥 ∈ 𝐴 (𝐴 ∩ (◡𝑅 “ {𝑥})) ∈ V)
51, 4bitr4i 281 1 (𝑅 Se 𝐴 ↔ ∀𝑥 ∈ 𝐴 Pred(𝑅, 𝐴, 𝑥) ∈ V)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   ↔ wb 209   ∈ wcel 2145  ∀wral 3077  Vcvv 3451   ∩ cin 3898  {csn 4584   Se wse 5602  ◡ccnv 5650   “ cima 5654  Predcpred 6302
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1943  ax-6 2000  ax-7 2041  ax-8 2147  ax-9 2155  ax-ext 2733  ax-sep 5249  ax-pr 5391
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-sb 2100  df-clab 2740  df-cleq 2753  df-clel 2836  df-ral 3078  df-rex 3088  df-rab 3414  df-v 3453  df-dif 3902  df-un 3904  df-in 3906  df-ss 3916  df-nul 4280  df-if 4483  df-sn 4585  df-pr 4587  df-op 4591  df-br 5104  df-opab 5168  df-se 5605  df-xp 5657  df-cnv 5659  df-dm 5661  df-rn 5662  df-res 5663  df-ima 5664  df-pred 6303
This theorem is used by:  sexp2  8156  sexp3  8163  ttrclselem2  9720  ttrclse  9721
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