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Theorem wetrep 4345
Description: An epsilon well-ordering is a transitive relation. (Contributed by NM, 22-Apr-1994.)
Assertion
Ref Expression
wetrep (( E We 𝐴 ∧ (𝑥𝐴𝑦𝐴𝑧𝐴)) → ((𝑥𝑦𝑦𝑧) → 𝑥𝑧))
Distinct variable group:   𝑥,𝐴,𝑦,𝑧

Proof of Theorem wetrep
StepHypRef Expression
1 df-3an 975 . . 3 ((𝑥𝐴𝑦𝐴𝑧𝐴) ↔ ((𝑥𝐴𝑦𝐴) ∧ 𝑧𝐴))
2 df-wetr 4319 . . . . . . . . 9 ( E We 𝐴 ↔ ( E Fr 𝐴 ∧ ∀𝑥𝐴𝑦𝐴𝑧𝐴 ((𝑥 E 𝑦𝑦 E 𝑧) → 𝑥 E 𝑧)))
32simprbi 273 . . . . . . . 8 ( E We 𝐴 → ∀𝑥𝐴𝑦𝐴𝑧𝐴 ((𝑥 E 𝑦𝑦 E 𝑧) → 𝑥 E 𝑧))
43r19.21bi 2558 . . . . . . 7 (( E We 𝐴𝑥𝐴) → ∀𝑦𝐴𝑧𝐴 ((𝑥 E 𝑦𝑦 E 𝑧) → 𝑥 E 𝑧))
54r19.21bi 2558 . . . . . 6 ((( E We 𝐴𝑥𝐴) ∧ 𝑦𝐴) → ∀𝑧𝐴 ((𝑥 E 𝑦𝑦 E 𝑧) → 𝑥 E 𝑧))
65anasss 397 . . . . 5 (( E We 𝐴 ∧ (𝑥𝐴𝑦𝐴)) → ∀𝑧𝐴 ((𝑥 E 𝑦𝑦 E 𝑧) → 𝑥 E 𝑧))
76r19.21bi 2558 . . . 4 ((( E We 𝐴 ∧ (𝑥𝐴𝑦𝐴)) ∧ 𝑧𝐴) → ((𝑥 E 𝑦𝑦 E 𝑧) → 𝑥 E 𝑧))
87anasss 397 . . 3 (( E We 𝐴 ∧ ((𝑥𝐴𝑦𝐴) ∧ 𝑧𝐴)) → ((𝑥 E 𝑦𝑦 E 𝑧) → 𝑥 E 𝑧))
91, 8sylan2b 285 . 2 (( E We 𝐴 ∧ (𝑥𝐴𝑦𝐴𝑧𝐴)) → ((𝑥 E 𝑦𝑦 E 𝑧) → 𝑥 E 𝑧))
10 epel 4277 . . 3 (𝑥 E 𝑦𝑥𝑦)
11 epel 4277 . . 3 (𝑦 E 𝑧𝑦𝑧)
1210, 11anbi12i 457 . 2 ((𝑥 E 𝑦𝑦 E 𝑧) ↔ (𝑥𝑦𝑦𝑧))
13 epel 4277 . 2 (𝑥 E 𝑧𝑥𝑧)
149, 12, 133imtr3g 203 1 (( E We 𝐴 ∧ (𝑥𝐴𝑦𝐴𝑧𝐴)) → ((𝑥𝑦𝑦𝑧) → 𝑥𝑧))
Colors of variables: wff set class
Syntax hints:  wi 4  wa 103  w3a 973  wcel 2141  wral 2448   class class class wbr 3989   E cep 4272   Fr wfr 4313   We wwe 4315
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 704  ax-5 1440  ax-7 1441  ax-gen 1442  ax-ie1 1486  ax-ie2 1487  ax-8 1497  ax-10 1498  ax-11 1499  ax-i12 1500  ax-bndl 1502  ax-4 1503  ax-17 1519  ax-i9 1523  ax-ial 1527  ax-i5r 1528  ax-14 2144  ax-ext 2152  ax-sep 4107  ax-pow 4160  ax-pr 4194
This theorem depends on definitions:  df-bi 116  df-3an 975  df-tru 1351  df-nf 1454  df-sb 1756  df-eu 2022  df-mo 2023  df-clab 2157  df-cleq 2163  df-clel 2166  df-nfc 2301  df-ral 2453  df-v 2732  df-un 3125  df-in 3127  df-ss 3134  df-pw 3568  df-sn 3589  df-pr 3590  df-op 3592  df-br 3990  df-opab 4051  df-eprel 4274  df-wetr 4319
This theorem is referenced by:  wessep  4562
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