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Mirrors > Home > MPE Home > Th. List > sbimdvOLD | Structured version Visualization version GIF version |
Description: Obsolete version of sbimdv 2083 as of 6-Jul-2023. Deduction substituting both sides of an implication, with 𝜑 and 𝑥 disjoint. See also sbimd 2245. (Contributed by Wolf Lammen, 6-May-2023.) (Proof modification is discouraged.) (New usage is discouraged.) |
Ref | Expression |
---|---|
sbimdvOLD.2 | ⊢ (𝜑 → (𝜓 → 𝜒)) |
Ref | Expression |
---|---|
sbimdvOLD | ⊢ (𝜑 → ([𝑦 / 𝑥]𝜓 → [𝑦 / 𝑥]𝜒)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | sbimdvOLD.2 | . . . 4 ⊢ (𝜑 → (𝜓 → 𝜒)) | |
2 | 1 | imim2d 57 | . . 3 ⊢ (𝜑 → ((𝑥 = 𝑦 → 𝜓) → (𝑥 = 𝑦 → 𝜒))) |
3 | 1 | anim2d 613 | . . . 4 ⊢ (𝜑 → ((𝑥 = 𝑦 ∧ 𝜓) → (𝑥 = 𝑦 ∧ 𝜒))) |
4 | 3 | eximdv 1918 | . . 3 ⊢ (𝜑 → (∃𝑥(𝑥 = 𝑦 ∧ 𝜓) → ∃𝑥(𝑥 = 𝑦 ∧ 𝜒))) |
5 | 2, 4 | anim12d 610 | . 2 ⊢ (𝜑 → (((𝑥 = 𝑦 → 𝜓) ∧ ∃𝑥(𝑥 = 𝑦 ∧ 𝜓)) → ((𝑥 = 𝑦 → 𝜒) ∧ ∃𝑥(𝑥 = 𝑦 ∧ 𝜒)))) |
6 | dfsb1 2510 | . 2 ⊢ ([𝑦 / 𝑥]𝜓 ↔ ((𝑥 = 𝑦 → 𝜓) ∧ ∃𝑥(𝑥 = 𝑦 ∧ 𝜓))) | |
7 | dfsb1 2510 | . 2 ⊢ ([𝑦 / 𝑥]𝜒 ↔ ((𝑥 = 𝑦 → 𝜒) ∧ ∃𝑥(𝑥 = 𝑦 ∧ 𝜒))) | |
8 | 5, 6, 7 | 3imtr4g 298 | 1 ⊢ (𝜑 → ([𝑦 / 𝑥]𝜓 → [𝑦 / 𝑥]𝜒)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 398 ∃wex 1780 [wsb 2069 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-10 2145 ax-12 2177 ax-13 2390 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-ex 1781 df-nf 1785 df-sb 2070 |
This theorem is referenced by: (None) |
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