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Related theorems GIF version |
| Description: The elements of an epsilon well-ordering are comparable. |
| Ref | Expression |
|---|---|
| wecmpep | ⊢ ((E We A ∧ (x ∈ A ∧ y ∈ A)) → (x ∈ y ∨ x = y ∨ y ∈ x)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | solin 2145 | . . 3 ⊢ ((E Or A ∧ (x ∈ A ∧ y ∈ A)) → (xEy ∨ x = y ∨ yEx)) | |
| 2 | epel 2124 | . . . 4 ⊢ (xEy ↔ x ∈ y) | |
| 3 | pm4.2 148 | . . . 4 ⊢ (x = y ↔ x = y) | |
| 4 | epel 2124 | . . . 4 ⊢ (yEx ↔ y ∈ x) | |
| 5 | 2, 3, 4 | bi3or 607 | . . 3 ⊢ ((xEy ∨ x = y ∨ yEx) ↔ (x ∈ y ∨ x = y ∨ y ∈ x)) |
| 6 | 1, 5 | sylib 173 | . 2 ⊢ ((E Or A ∧ (x ∈ A ∧ y ∈ A)) → (x ∈ y ∨ x = y ∨ y ∈ x)) |
| 7 | weso 2192 | . 2 ⊢ (E We A → E Or A) | |
| 8 | 6, 7 | sylan 343 | 1 ⊢ ((E We A ∧ (x ∈ A ∧ y ∈ A)) → (x ∈ y ∨ x = y ∨ y ∈ x)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 2 ∧ wa 196 ∨ w3o 580 = weq 797 ∈ wel 803 ∈ wcel 1092 class class class wbr 2054 Ecep 2056 Or wor 2059 We wwe 2062 |
| This theorem is referenced by: tz7.7 2224 |
| This theorem was proved from axioms: ax-1 3 ax-2 4 ax-3 5 ax-mp 6 ax-4 673 ax-5 674 ax-6 675 ax-7 676 ax-gen 677 ax-8 798 ax-9 799 ax-10 800 ax-11 801 ax-12 802 ax-13 804 ax-14 805 ax-16 922 ax-17 925 ax-ext 1074 ax-rep 1075 ax-pow 1077 |
| This theorem depends on definitions: df-bi 128 df-or 197 df-an 198 df-3or 582 df-ex 679 df-sb 853 df-clab 1093 df-cleq 1097 df-clel 1099 df-ral 1205 df-v 1349 df-dif 1489 df-un 1490 df-in 1491 df-ss 1492 df-nul 1708 df-pw 1799 df-sn 1811 df-pr 1812 df-op 1815 df-br 2063 df-opab 2098 df-eprel 2122 df-so 2138 df-we 2186 |