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Related theorems GIF version |
| Description: Inference adding restricted existential quantifier to both sides of an equivalence. |
| Ref | Expression |
|---|---|
| ralbii.1 | ⊢ (φ ↔ ψ) |
| Ref | Expression |
|---|---|
| rexbii | ⊢ (∃x ∈ A φ ↔ ∃x ∈ A ψ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | biid 168 | . 2 ⊢ (φ ↔ φ) | |
| 2 | 1 | hbth 1037 | . . 3 ⊢ ((φ ↔ φ) → ∀x(φ ↔ φ)) |
| 3 | ralbii.1 | . . . 4 ⊢ (φ ↔ ψ) | |
| 4 | 3 | a1i 8 | . . 3 ⊢ ((φ ↔ φ) → (φ ↔ ψ)) |
| 5 | 2, 4 | rexbid 1708 | . 2 ⊢ ((φ ↔ φ) → (∃x ∈ A φ ↔ ∃x ∈ A ψ)) |
| 6 | 1, 5 | ax-mp 7 | 1 ⊢ (∃x ∈ A φ ↔ ∃x ∈ A ψ) |
| Colors of variables: wff set class |
| Syntax hints: ↔ wb 144 ∃wrex 1692 |
| This theorem is referenced by: 2rexbii 1716 rexanali 1730 r19.29r 1803 r19.42v 1810 reeanv 1824 rexcom4 1870 ceqsrex2v 1936 reu7 1981 0el 2349 uni0b 2590 iuncom 2639 iuniin 2641 iunrab 2664 iinss 2668 iunn0 2676 iunin2 2677 iundif2 2679 iunun 2683 iununi 2686 iunpwss 2691 dffr2 2949 dfepfr 2960 epfrc 2961 sucel 3046 reuxfr 3127 iunpw 3137 iunxpf 3305 cnvuni 3392 dffr3 3523 dminxp 3568 imaco 3604 coiun 3608 isarep1 3683 iunfopab 3719 abrexexlem2 3973 imaiun 3978 abrexex2 3985 elrnoprabg 4186 dfrdg2 4234 rdglem1 4238 tz7.49 4260 uniqs 4436 qsid 4442 zfregcl 4738 zfreg 4739 zfreg2 4740 ac6n 4903 kmlem7 4917 kmlem13 4923 numth2 4931 zorn2lem7 4940 zorn 4943 brdom7disj 4950 brdom6disj 4951 isinfcard 5037 ssxr 5694 dfinfmr 6235 infmsup 6236 supxrre 6251 infmxrcl 6254 uzwo 6582 uzwoOLD 6583 nnwof 6586 cau3iri 7118 cbvsumi 7189 clmnnsi 7287 climunii 7301 climresi 7308 infcvglem1 7425 ivthlem6 7491 efaddlem27 7569 tgval2 7829 blrn2 8052 lmbrnns 8153 lmcvgnns 8154 bcthlem33 8242 isgrp2i 8293 axgroth4 9052 grothpw 9054 axgroth5 9055 grothprim 9057 axhcompl 9143 hhcmpl 9345 hlimuniii 9384 shne0i 9647 nmcopexlem1 10230 nmcopexlem2 10231 nmcfnexlem1 10259 nmcfnexlem2 10260 cdj3lem3b 10649 negcmpprcal2 10724 ntunte 10728 sallnei 11016 subsp 11056 lpni 11417 fictblem 11422 fictb 11423 ordtypelem4 11430 compcov 11486 hscptsscld 11491 reconnlem1 11507 is1stc3 11530 locfincomp 11575 neibastop2lem3 11582 neibastop2lem4 11583 ist0-2 11600 isufil2 11650 ufileu 11658 limfilcf 11683 hausfillim 11685 fcluscf 11724 flimfnfcls 11727 filnetlem2 11764 abrexex2g 11825 sdc 11877 txbas 11973 isbnd3 11997 heiborlem8 12018 heiborlem29 12039 ismrer1 12080 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-gen 999 ax-4 1009 ax-5o 1011 |
| This theorem depends on definitions: df-bi 145 df-an 223 df-ex 1017 df-rex 1696 |