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Mirrors > Home > ILE Home > Th. List > abbii | GIF version |
Description: Equivalent wff's yield equal class abstractions (inference form). (Contributed by NM, 5-Aug-1993.) |
Ref | Expression |
---|---|
abbii.1 | ⊢ (𝜑 ↔ 𝜓) |
Ref | Expression |
---|---|
abbii | ⊢ {𝑥 ∣ 𝜑} = {𝑥 ∣ 𝜓} |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | abbi 2253 | . 2 ⊢ (∀𝑥(𝜑 ↔ 𝜓) ↔ {𝑥 ∣ 𝜑} = {𝑥 ∣ 𝜓}) | |
2 | abbii.1 | . 2 ⊢ (𝜑 ↔ 𝜓) | |
3 | 1, 2 | mpgbi 1428 | 1 ⊢ {𝑥 ∣ 𝜑} = {𝑥 ∣ 𝜓} |
Colors of variables: wff set class |
Syntax hints: ↔ wb 104 = wceq 1331 {cab 2125 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-11 1484 ax-4 1487 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2121 |
This theorem depends on definitions: df-bi 116 df-tru 1334 df-nf 1437 df-sb 1736 df-clab 2126 df-cleq 2132 |
This theorem is referenced by: rabswap 2609 rabbiia 2671 rabab 2707 csb2 3005 cbvcsbw 3007 cbvcsb 3008 csbid 3011 csbco 3013 cbvreucsf 3064 unrab 3347 inrab 3348 inrab2 3349 difrab 3350 rabun2 3355 dfnul3 3366 rab0 3391 tprot 3616 pw0 3667 dfuni2 3738 unipr 3750 dfint2 3773 int0 3785 dfiunv2 3849 cbviun 3850 cbviin 3851 iunrab 3860 iunid 3868 viin 3872 cbvopab 3999 cbvopab1 4001 cbvopab2 4002 cbvopab1s 4003 cbvopab2v 4005 unopab 4007 iunopab 4203 abnex 4368 uniuni 4372 ruv 4465 rabxp 4576 dfdm3 4726 dfrn2 4727 dfrn3 4728 dfdm4 4731 dfdmf 4732 dmun 4746 dmopab 4750 dmopabss 4751 dmopab3 4752 dfrnf 4780 rnopab 4786 rnmpt 4787 dfima2 4883 dfima3 4884 imadmrn 4891 imai 4895 args 4908 mptpreima 5032 dfiota2 5089 cbviota 5093 sb8iota 5095 dffv4g 5418 dfimafn2 5471 fnasrn 5598 fnasrng 5600 elabrex 5659 abrexco 5660 dfoprab2 5818 cbvoprab2 5844 dmoprab 5852 rnoprab 5854 rnoprab2 5855 fnrnov 5916 abrexex2g 6018 abrexex2 6022 abexssex 6023 abexex 6024 oprabrexex2 6028 dfopab2 6087 cnvoprab 6131 tfr1onlemaccex 6245 tfrcllemaccex 6258 tfrcldm 6260 frec0g 6294 frecsuc 6304 snec 6490 pmex 6547 dfixp 6594 cbvixp 6609 caucvgprprlemmu 7503 caucvgsr 7610 pitonnlem1 7653 mertenslem2 11305 toponsspwpwg 12189 tgval2 12220 bdcuni 13074 bj-dfom 13131 |
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