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| Mirrors > Home > MPE Home > Th. List > wfis2f | Structured version Visualization version GIF version | ||
| Description: Well-Ordered Induction schema, using implicit substitution. (Contributed by Scott Fenton, 29-Jan-2011.) |
| Ref | Expression |
|---|---|
| wfis2f.1 | ⊢ 𝑅 We 𝐴 |
| wfis2f.2 | ⊢ 𝑅 Se 𝐴 |
| wfis2f.3 | ⊢ Ⅎ𝑦𝜓 |
| wfis2f.4 | ⊢ (𝑦 = 𝑧 → (𝜑 ↔ 𝜓)) |
| wfis2f.5 | ⊢ (𝑦 ∈ 𝐴 → (∀𝑧 ∈ Pred (𝑅, 𝐴, 𝑦)𝜓 → 𝜑)) |
| Ref | Expression |
|---|---|
| wfis2f | ⊢ (𝑦 ∈ 𝐴 → 𝜑) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | wfis2f.1 | . . 3 ⊢ 𝑅 We 𝐴 | |
| 2 | wfis2f.2 | . . 3 ⊢ 𝑅 Se 𝐴 | |
| 3 | wfis2f.3 | . . . 4 ⊢ Ⅎ𝑦𝜓 | |
| 4 | wfis2f.4 | . . . 4 ⊢ (𝑦 = 𝑧 → (𝜑 ↔ 𝜓)) | |
| 5 | wfis2f.5 | . . . 4 ⊢ (𝑦 ∈ 𝐴 → (∀𝑧 ∈ Pred (𝑅, 𝐴, 𝑦)𝜓 → 𝜑)) | |
| 6 | 3, 4, 5 | wfis2fg 6342 | . . 3 ⊢ ((𝑅 We 𝐴 ∧ 𝑅 Se 𝐴) → ∀𝑦 ∈ 𝐴 𝜑) |
| 7 | 1, 2, 6 | mp2an 702 | . 2 ⊢ ∀𝑦 ∈ 𝐴 𝜑 |
| 8 | 7 | rspec 3255 | 1 ⊢ (𝑦 ∈ 𝐴 → 𝜑) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 208 Ⅎwnf 1805 ∈ wcel 2144 ∀wral 3078 Se wse 5600 We wwe 5601 Predcpred 6289 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1817 ax-4 1831 ax-5 1932 ax-6 1989 ax-7 2030 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2214 ax-ext 2736 ax-sep 5248 ax-pr 5392 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3an 1101 df-tru 1565 df-fal 1575 df-ex 1802 df-nf 1806 df-sb 2093 df-clab 2743 df-cleq 2756 df-clel 2839 df-nfc 2913 df-ne 2960 df-ral 3079 df-rex 3089 df-rab 3417 df-v 3458 df-sbc 3747 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-nul 4288 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-br 5103 df-opab 5165 df-po 5557 df-so 5558 df-fr 5602 df-se 5603 df-we 5604 df-xp 5655 df-cnv 5657 df-dm 5659 df-rn 5660 df-res 5661 df-ima 5662 df-pred 6290 |
| This theorem is referenced by: (None) |
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