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| Mirrors > Home > ILE Home > Th. List > wetrep | GIF version | ||
| Description: An epsilon well-ordering is a transitive relation. (Contributed by NM, 22-Apr-1994.) |
| Ref | Expression |
|---|---|
| wetrep | ⊢ (( E We 𝐴 ∧ (𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐴 ∧ 𝑧 ∈ 𝐴)) → ((𝑥 ∈ 𝑦 ∧ 𝑦 ∈ 𝑧) → 𝑥 ∈ 𝑧)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-3an 1011 | . . 3 ⊢ ((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐴 ∧ 𝑧 ∈ 𝐴) ↔ ((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐴) ∧ 𝑧 ∈ 𝐴)) | |
| 2 | df-wetr 4477 | . . . . . . . . 9 ⊢ ( E We 𝐴 ↔ ( E Fr 𝐴 ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 ∀𝑧 ∈ 𝐴 ((𝑥 E 𝑦 ∧ 𝑦 E 𝑧) → 𝑥 E 𝑧))) | |
| 3 | 2 | simprbi 275 | . . . . . . . 8 ⊢ ( E We 𝐴 → ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 ∀𝑧 ∈ 𝐴 ((𝑥 E 𝑦 ∧ 𝑦 E 𝑧) → 𝑥 E 𝑧)) |
| 4 | 3 | r19.21bi 2638 | . . . . . . 7 ⊢ (( E We 𝐴 ∧ 𝑥 ∈ 𝐴) → ∀𝑦 ∈ 𝐴 ∀𝑧 ∈ 𝐴 ((𝑥 E 𝑦 ∧ 𝑦 E 𝑧) → 𝑥 E 𝑧)) |
| 5 | 4 | r19.21bi 2638 | . . . . . 6 ⊢ ((( E We 𝐴 ∧ 𝑥 ∈ 𝐴) ∧ 𝑦 ∈ 𝐴) → ∀𝑧 ∈ 𝐴 ((𝑥 E 𝑦 ∧ 𝑦 E 𝑧) → 𝑥 E 𝑧)) |
| 6 | 5 | anasss 403 | . . . . 5 ⊢ (( E We 𝐴 ∧ (𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐴)) → ∀𝑧 ∈ 𝐴 ((𝑥 E 𝑦 ∧ 𝑦 E 𝑧) → 𝑥 E 𝑧)) |
| 7 | 6 | r19.21bi 2638 | . . . 4 ⊢ ((( E We 𝐴 ∧ (𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐴)) ∧ 𝑧 ∈ 𝐴) → ((𝑥 E 𝑦 ∧ 𝑦 E 𝑧) → 𝑥 E 𝑧)) |
| 8 | 7 | anasss 403 | . . 3 ⊢ (( E We 𝐴 ∧ ((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐴) ∧ 𝑧 ∈ 𝐴)) → ((𝑥 E 𝑦 ∧ 𝑦 E 𝑧) → 𝑥 E 𝑧)) |
| 9 | 1, 8 | sylan2b 287 | . 2 ⊢ (( E We 𝐴 ∧ (𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐴 ∧ 𝑧 ∈ 𝐴)) → ((𝑥 E 𝑦 ∧ 𝑦 E 𝑧) → 𝑥 E 𝑧)) |
| 10 | epel 4435 | . . 3 ⊢ (𝑥 E 𝑦 ↔ 𝑥 ∈ 𝑦) | |
| 11 | epel 4435 | . . 3 ⊢ (𝑦 E 𝑧 ↔ 𝑦 ∈ 𝑧) | |
| 12 | 10, 11 | anbi12i 464 | . 2 ⊢ ((𝑥 E 𝑦 ∧ 𝑦 E 𝑧) ↔ (𝑥 ∈ 𝑦 ∧ 𝑦 ∈ 𝑧)) |
| 13 | epel 4435 | . 2 ⊢ (𝑥 E 𝑧 ↔ 𝑥 ∈ 𝑧) | |
| 14 | 9, 12, 13 | 3imtr3g 204 | 1 ⊢ (( E We 𝐴 ∧ (𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐴 ∧ 𝑧 ∈ 𝐴)) → ((𝑥 ∈ 𝑦 ∧ 𝑦 ∈ 𝑧) → 𝑥 ∈ 𝑧)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ∧ w3a 1009 ∈ wcel 2209 ∀wral 2528 class class class wbr 4128 E cep 4430 Fr wfr 4471 We wwe 4473 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-sep 4247 ax-pow 4309 ax-pr 4344 |
| This theorem depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ral 2533 df-v 2823 df-un 3224 df-in 3226 df-ss 3233 df-pw 3690 df-sn 3714 df-pr 3715 df-op 3717 df-br 4129 df-opab 4191 df-eprel 4432 df-wetr 4477 |
| This theorem is referenced by: wessep 4723 |
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