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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 2749 | . 2 ⊢ (𝐴 = 𝐵 → (∀𝑥 ∈ 𝐴 𝜑 ↔ ∀𝑥 ∈ 𝐵 𝜑)) | |
| 2 | raleqd.1 | . . 3 ⊢ (𝐴 = 𝐵 → (𝜑 ↔ 𝜓)) | |
| 3 | 2 | ralbidv 2550 | . 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 |
| This proof depends on syntax axioms: → wi 4 ↔ wb 105 = wceq 1402 ∀wral 2528 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-ext 2220 |
| This proof depends on definitions: df-bi 117 df-tru 1405 df-nf 1514 df-sb 1816 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ral 2533 |
| This theorem is used by: frforeq2 4488 weeq2 4500 peano5 4743 isoeq4 6004 exmidomni 7476 papeq2 7604 tapeq2 7613 pitonn 8209 peano1nnnn 8213 peano2nnnn 8214 peano5nnnn 8253 peano5nni 9290 1nn 9298 peano2nn 9299 dfuzi 9739 mhmpropd 13756 issubm 13762 isghm 14029 ghmeql 14053 iscmn 14079 dfrhm2 14444 islssm 14677 islssmg 14678 istopg 15083 isbasisg 15128 basis2 15132 eltg2 15137 ispsmet 15407 ismet 15428 isxmet 15429 metrest 15590 cncfval 15656 bj-indeq 16938 bj-nntrans 16960 |
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