| Metamath Proof Explorer |
< Previous
Next >
Related theorems GIF version |
| Description: Equality deduction for restricted existential quantifier. |
| Ref | Expression |
|---|---|
| raleq1d.1 | ⊢ (φ → A = B) |
| Ref | Expression |
|---|---|
| rexeq1d | ⊢ (φ → (∃x ∈ A ψ ↔ ∃x ∈ B ψ)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | raleq1d.1 | . 2 ⊢ (φ → A = B) | |
| 2 | rexeq1 1833 | . 2 ⊢ (A = B → (∃x ∈ A ψ ↔ ∃x ∈ B ψ)) | |
| 3 | 1, 2 | syl 10 | 1 ⊢ (φ → (∃x ∈ A ψ ↔ ∃x ∈ B ψ)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 3 ↔ wb 144 = wceq 992 ∃wrex 1692 |
| This theorem is referenced by: rexeq12d 1841 clmi2a 7294 opnfval 8067 cmsss 8208 hlcompl 8879 pjth 9510 pjtheu 9512 pjmval 9514 cayleythlem 10698 bwt2 11123 isplig 11319 compcov 11486 compsublem 11487 compsub 11488 uncomp 11490 hscptsscld 11491 cncomp 11494 alexsublem4 11499 alexsub 11500 islocfin 11567 locfinnei 11573 neibastop2lem2 11581 neibastop2lem3 11582 neibastop2lem4 11583 hausfillim 11685 filfm 11706 dirge 11754 totbndss 11993 heiborlem1 12011 heiborlem9 12019 heiborlem16 12026 heiborlem42 12052 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 998 ax-gen 999 ax-17 1007 ax-4 1009 ax-5o 1011 ax-6o 1014 ax-9o 1159 ax-ext 1500 |
| This theorem depends on definitions: df-bi 145 df-an 223 df-ex 1017 df-cleq 1511 df-clel 1514 df-rex 1696 |