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| Mirrors > Home > MPE Home > Th. List > ralbii2 | Structured version Visualization version GIF version | ||
| Description: Inference adding different restricted universal quantifiers to each side of an equivalence. (Contributed by NM, 15-Aug-2005.) |
| Ref | Expression |
|---|---|
| ralbii2.1 | ⊢ ((𝑥 ∈ 𝐴 → 𝜑) ↔ (𝑥 ∈ 𝐵 → 𝜓)) |
| Ref | Expression |
|---|---|
| ralbii2 | ⊢ (∀𝑥 ∈ 𝐴 𝜑 ↔ ∀𝑥 ∈ 𝐵 𝜓) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ralbii2.1 | . . 3 ⊢ ((𝑥 ∈ 𝐴 → 𝜑) ↔ (𝑥 ∈ 𝐵 → 𝜓)) | |
| 2 | 1 | albii 1852 | . 2 ⊢ (∀𝑥(𝑥 ∈ 𝐴 → 𝜑) ↔ ∀𝑥(𝑥 ∈ 𝐵 → 𝜓)) |
| 3 | df-ral 3078 | . 2 ⊢ (∀𝑥 ∈ 𝐴 𝜑 ↔ ∀𝑥(𝑥 ∈ 𝐴 → 𝜑)) | |
| 4 | df-ral 3078 | . 2 ⊢ (∀𝑥 ∈ 𝐵 𝜓 ↔ ∀𝑥(𝑥 ∈ 𝐵 → 𝜓)) | |
| 5 | 2, 3, 4 | 3bitr4i 306 | 1 ⊢ (∀𝑥 ∈ 𝐴 𝜑 ↔ ∀𝑥 ∈ 𝐵 𝜓) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∀wal 1568 ∈ wcel 2145 ∀wral 3077 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 |
| This proof depends on definitions: df-bi 210 df-ral 3078 |
| This theorem is used by: ralbiia 3107 ralcom3 3113 raleqbii 3333 ralrab 3652 raldifb 4096 ralin 4195 raldifsni 4758 reusv2 5365 dfsup2 9429 iscard2 10050 acnnum 10124 dfac9 10208 dfacacn 10213 raluz2 13017 ralrp 13135 isprm4 16852 sdrgacs 21051 isnrm2 23669 ismbl 25840 ellimc3 26192 dchrelbas2 27557 onsis 28653 ons2ind 28654 h1dei 32145 iineq1i 36965 ixpeq1i 36969 fnwe2lem2 44037 |
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