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| Mirrors > Home > MPE Home > Th. List > frpoins3g | Structured version Visualization version GIF version | ||
| Description: Well-Founded Induction schema, using implicit substitution. (Contributed by Scott Fenton, 19-Aug-2024.) |
| Ref | Expression |
|---|---|
| frpoins3g.1 | ⊢ (𝑥 ∈ 𝐴 → (∀𝑦 ∈ Pred (𝑅, 𝐴, 𝑥)𝜓 → 𝜑)) |
| frpoins3g.2 | ⊢ (𝑥 = 𝑦 → (𝜑 ↔ 𝜓)) |
| frpoins3g.3 | ⊢ (𝑥 = 𝐵 → (𝜑 ↔ 𝜒)) |
| Ref | Expression |
|---|---|
| frpoins3g | ⊢ (((𝑅 Fr 𝐴 ∧ 𝑅 Po 𝐴 ∧ 𝑅 Se 𝐴) ∧ 𝐵 ∈ 𝐴) → 𝜒) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | frpoins3g.1 | . . 3 ⊢ (𝑥 ∈ 𝐴 → (∀𝑦 ∈ Pred (𝑅, 𝐴, 𝑥)𝜓 → 𝜑)) | |
| 2 | frpoins3g.2 | . . 3 ⊢ (𝑥 = 𝑦 → (𝜑 ↔ 𝜓)) | |
| 3 | 1, 2 | frpoins2g 6299 | . 2 ⊢ ((𝑅 Fr 𝐴 ∧ 𝑅 Po 𝐴 ∧ 𝑅 Se 𝐴) → ∀𝑥 ∈ 𝐴 𝜑) |
| 4 | frpoins3g.3 | . . 3 ⊢ (𝑥 = 𝐵 → (𝜑 ↔ 𝜒)) | |
| 5 | 4 | rspccva 3562 | . 2 ⊢ ((∀𝑥 ∈ 𝐴 𝜑 ∧ 𝐵 ∈ 𝐴) → 𝜒) |
| 6 | 3, 5 | sylan 582 | 1 ⊢ (((𝑅 Fr 𝐴 ∧ 𝑅 Po 𝐴 ∧ 𝑅 Se 𝐴) ∧ 𝐵 ∈ 𝐴) → 𝜒) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 207 ∧ wa 396 ∧ w3a 1088 = wceq 1543 ∈ wcel 2115 ∀wral 3050 Po wpo 5527 Fr wfr 5571 Se wse 5572 Predcpred 6254 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1970 ax-7 2011 ax-8 2117 ax-9 2125 ax-10 2148 ax-11 2164 ax-12 2185 ax-ext 2708 ax-sep 5221 ax-pr 5365 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 850 df-3an 1090 df-tru 1546 df-fal 1556 df-ex 1783 df-nf 1787 df-sb 2070 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2932 df-ral 3051 df-rex 3061 df-rab 3389 df-v 3430 df-sbc 3727 df-dif 3889 df-un 3891 df-in 3893 df-ss 3903 df-nul 4265 df-if 4458 df-pw 4534 df-sn 4559 df-pr 4561 df-op 4565 df-br 5076 df-opab 5138 df-po 5529 df-fr 5574 df-se 5575 df-xp 5627 df-cnv 5629 df-dm 5631 df-rn 5632 df-res 5633 df-ima 5634 df-pred 6255 |
| This theorem is referenced by: noinds 27958 |
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