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| Mirrors > Home > ILE Home > Th. List > raleqbi1dv | GIF version | ||
| Description: Equality deduction for restricted universal quantifier. (Contributed by NM, 16-Nov-1995.) |
| Ref | Expression |
|---|---|
| raleqd.1 | ⊢ (𝐴 = 𝐵 → (𝜑 ↔ 𝜓)) |
| Ref | Expression |
|---|---|
| raleqbi1dv | ⊢ (𝐴 = 𝐵 → (∀𝑥 ∈ 𝐴 𝜑 ↔ ∀𝑥 ∈ 𝐵 𝜓)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | raleq 2702 | . 2 ⊢ (𝐴 = 𝐵 → (∀𝑥 ∈ 𝐴 𝜑 ↔ ∀𝑥 ∈ 𝐵 𝜑)) | |
| 2 | raleqd.1 | . . 3 ⊢ (𝐴 = 𝐵 → (𝜑 ↔ 𝜓)) | |
| 3 | 2 | ralbidv 2506 | . 2 ⊢ (𝐴 = 𝐵 → (∀𝑥 ∈ 𝐵 𝜑 ↔ ∀𝑥 ∈ 𝐵 𝜓)) |
| 4 | 1, 3 | bitrd 188 | 1 ⊢ (𝐴 = 𝐵 → (∀𝑥 ∈ 𝐴 𝜑 ↔ ∀𝑥 ∈ 𝐵 𝜓)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ↔ wb 105 = wceq 1373 ∀wral 2484 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 711 ax-5 1470 ax-7 1471 ax-gen 1472 ax-ie1 1516 ax-ie2 1517 ax-8 1527 ax-10 1528 ax-11 1529 ax-i12 1530 ax-bndl 1532 ax-4 1533 ax-17 1549 ax-i9 1553 ax-ial 1557 ax-i5r 1558 ax-ext 2187 |
| This theorem depends on definitions: df-bi 117 df-tru 1376 df-nf 1484 df-sb 1786 df-cleq 2198 df-clel 2201 df-nfc 2337 df-ral 2489 |
| This theorem is referenced by: frforeq2 4392 weeq2 4404 peano5 4646 isoeq4 5873 exmidomni 7244 tapeq2 7365 pitonn 7961 peano1nnnn 7965 peano2nnnn 7966 peano5nnnn 8005 peano5nni 9039 1nn 9047 peano2nn 9048 dfuzi 9483 mhmpropd 13298 issubm 13304 isghm 13579 ghmeql 13603 iscmn 13629 dfrhm2 13916 islssm 14119 islssmg 14120 istopg 14471 isbasisg 14516 basis2 14520 eltg2 14525 ispsmet 14795 ismet 14816 isxmet 14817 metrest 14978 cncfval 15044 bj-indeq 15865 bj-nntrans 15887 |
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