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Related theorems GIF version |
| Description: Formula-building rule for restricted existential quantifier (deduction rule). |
| Ref | Expression |
|---|---|
| biraldv.1 | ⊢ (φ → (ψ ↔ χ)) |
| Ref | Expression |
|---|---|
| birexdv | ⊢ (φ → (∃x ∈ A ψ ↔ ∃x ∈ A χ)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ax-17 925 | . 2 ⊢ (φ → ∀xφ) | |
| 2 | biraldv.1 | . 2 ⊢ (φ → (ψ ↔ χ)) | |
| 3 | 1, 2 | birexd 1218 | 1 ⊢ (φ → (∃x ∈ A ψ ↔ ∃x ∈ A χ)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 2 ↔ wb 127 ∃wrex 1202 |
| This theorem is referenced by: rexeqd 1328 rcla42ev 1405 eliun 1998 dfiun2 2014 dfiin2 2015 iunrab 2022 iununi 2037 supmo 2156 suplub 2161 freq1 2174 orduninsuc 2365 elima 2606 funcnvuni 2706 fvelima 2859 fvelrn 2883 abrexexlem2 2911 abrexex2 2915 f1oiso 2942 f1oweOLD 2944 tfrlem3 2951 tfrlem12 2960 rdgeq1 2972 rdgeq2 2973 elrnoprab 3054 qseq2 3226 elqs 3227 pssnn 3428 unblem1 3431 unblem2 3432 unbnn2 3436 fiint 3445 tz9.13 3507 aceq1 3552 aceq2 3554 aceq5lem3 3560 aceq5lem4 3561 aceq6a 3564 aceq6b 3565 kmlem8 3587 kmlem11 3590 kmlem14 3593 numth2 3600 numthcor 3601 zornlem7 3609 cardiun 3665 cflim 3704 prnmax 3893 genpv 3896 axrecex 4079 axrnegex 4080 axrrecex 4081 axcnre 4087 nnunb 4520 arch 4521 creur 4532 creui 4533 elq 4629 revalt 4794 imvalt 4795 replimt 4798 clim 4877 clim2 4881 climunii 4883 hcauchy 5103 hlim 5108 hlim2 5112 hlimcaui |