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Mirrors > Home > MPE Home > Th. List > rspcdf | Structured version Visualization version GIF version |
Description: Restricted specialization, using implicit substitution. (Contributed by Emmett Weisz, 16-Jan-2020.) |
Ref | Expression |
---|---|
rspcdf.1 | ⊢ Ⅎ𝑥𝜑 |
rspcdf.2 | ⊢ Ⅎ𝑥𝜒 |
rspcdf.3 | ⊢ (𝜑 → 𝐴 ∈ 𝐵) |
rspcdf.4 | ⊢ ((𝜑 ∧ 𝑥 = 𝐴) → (𝜓 ↔ 𝜒)) |
Ref | Expression |
---|---|
rspcdf | ⊢ (𝜑 → (∀𝑥 ∈ 𝐵 𝜓 → 𝜒)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | rspcdf.1 | . . 3 ⊢ Ⅎ𝑥𝜑 | |
2 | rspcdf.4 | . . . 4 ⊢ ((𝜑 ∧ 𝑥 = 𝐴) → (𝜓 ↔ 𝜒)) | |
3 | 2 | ex 415 | . . 3 ⊢ (𝜑 → (𝑥 = 𝐴 → (𝜓 ↔ 𝜒))) |
4 | 1, 3 | alrimi 2206 | . 2 ⊢ (𝜑 → ∀𝑥(𝑥 = 𝐴 → (𝜓 ↔ 𝜒))) |
5 | rspcdf.3 | . 2 ⊢ (𝜑 → 𝐴 ∈ 𝐵) | |
6 | rspcdf.2 | . . 3 ⊢ Ⅎ𝑥𝜒 | |
7 | 6 | rspct 3607 | . 2 ⊢ (∀𝑥(𝑥 = 𝐴 → (𝜓 ↔ 𝜒)) → (𝐴 ∈ 𝐵 → (∀𝑥 ∈ 𝐵 𝜓 → 𝜒))) |
8 | 4, 5, 7 | sylc 65 | 1 ⊢ (𝜑 → (∀𝑥 ∈ 𝐵 𝜓 → 𝜒)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 208 ∧ wa 398 ∀wal 1529 = wceq 1531 Ⅎwnf 1778 ∈ wcel 2108 ∀wral 3136 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1790 ax-4 1804 ax-5 1905 ax-6 1964 ax-7 2009 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2154 ax-12 2170 ax-ext 2791 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-tru 1534 df-ex 1775 df-nf 1779 df-sb 2064 df-clab 2798 df-cleq 2812 df-clel 2891 df-nfc 2961 df-ral 3141 df-v 3495 |
This theorem is referenced by: rspc2daf 30223 |
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