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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 1851 | . 2 ⊢ (∀𝑥(𝑥 ∈ 𝐴 → 𝜑) ↔ ∀𝑥(𝑥 ∈ 𝐵 → 𝜓)) |
| 3 | df-ral 3077 | . 2 ⊢ (∀𝑥 ∈ 𝐴 𝜑 ↔ ∀𝑥(𝑥 ∈ 𝐴 → 𝜑)) | |
| 4 | df-ral 3077 | . 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 1567 ∈ wcel 2144 ∀wral 3076 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 |
| This proof depends on definitions: df-bi 210 df-ral 3077 |
| This theorem is used by: ralbiia 3106 ralcom3 3112 raleqbii 3332 ralrab 3651 raldifb 4085 ralin 4146 raldifsni 4754 reusv2 5364 fnwe2lem3 8150 dfsup2 9440 iscard2 10061 acnnum 10135 dfac9 10219 dfacacn 10224 raluz2 13028 ralrp 13146 isprm4 16865 sdrgacs 21064 isnrm2 23682 ismbl 25853 ellimc3 26205 dchrelbas2 27570 onsis 28666 ons2ind 28667 h1dei 32158 iineq1i 37078 ixpeq1i 37082 |
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