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Theorem onf1we 35764
Description: If 𝐹 maps 𝐴 one-to-one into the ordinals, then 𝑅 well-orders 𝐴. (Contributed by BTernaryTau, 16-Sep-2026.)
Hypothesis
Ref Expression
onf1we.1 𝑅 = {⟨𝑥, 𝑦⟩ ∣ (𝐹‘𝑥) ∈ (𝐹‘𝑦)}
Assertion
Ref Expression
onf1we (𝐹:𝐴–1-1→On → 𝑅 We 𝐴)
Distinct variable group:   𝑥,𝐹,𝑦
Allowed substitution hints:   𝐴(𝑥, 𝑦)   𝑅(𝑥, 𝑦)

Proof of Theorem onf1we
StepHypRef Expression
1 f1f 6778 . . . 4 (𝐹:𝐴–1-1→On → 𝐹:𝐴⟶On)
21frnd 6718 . . 3 (𝐹:𝐴–1-1→On → ran 𝐹 ⊆ On)
3 epweon 7789 . . 3 E We On
4 wess 5636 . . 3 (ran 𝐹 ⊆ On → ( E We On → E We ran 𝐹))
52, 3, 4mpisyl 22 . 2 (𝐹:𝐴–1-1→On → E We ran 𝐹)
6 f1f1orn 6836 . . 3 (𝐹:𝐴–1-1→On → 𝐹:𝐴–1-1-onto→ran 𝐹)
7 onf1we.1 . . . . 5 𝑅 = {⟨𝑥, 𝑦⟩ ∣ (𝐹‘𝑥) ∈ (𝐹‘𝑦)}
8 fvex 6898 . . . . . . 7 (𝐹‘𝑦) ∈ V
98epeli 5552 . . . . . 6 ((𝐹‘𝑥) E (𝐹‘𝑦) ↔ (𝐹‘𝑥) ∈ (𝐹‘𝑦))
109opabbii 5171 . . . . 5 {⟨𝑥, 𝑦⟩ ∣ (𝐹‘𝑥) E (𝐹‘𝑦)} = {⟨𝑥, 𝑦⟩ ∣ (𝐹‘𝑥) ∈ (𝐹‘𝑦)}
117, 10eqtr4i 2786 . . . 4 𝑅 = {⟨𝑥, 𝑦⟩ ∣ (𝐹‘𝑥) E (𝐹‘𝑦)}
1211f1owe 7361 . . 3 (𝐹:𝐴–1-1-onto→ran 𝐹 → (𝑅 We 𝐴 ↔ E We ran 𝐹))
136, 12syl 18 . 2 (𝐹:𝐴–1-1→On → (𝑅 We 𝐴 ↔ E We ran 𝐹))
145, 13mpbird 260 1 (𝐹:𝐴–1-1→On → 𝑅 We 𝐴)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   → wi 4   ↔ wb 209   = wceq 1569   ∈ wcel 2144   ⊆ wss 3895   class class class wbr 5102  {copab 5166   E cep 5549   We wwe 5602  ran crn 5651  Oncon0 6362  –1-1→wf1 6535  –1-1-onto→wf1o 6537  ‘cfv 6538
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1827  ax-4 1841  ax-5 1942  ax-6 1999  ax-7 2040  ax-8 2146  ax-9 2154  ax-10 2177  ax-11 2193  ax-12 2212  ax-ext 2732  ax-rep 5231  ax-sep 5248  ax-nul 5259  ax-pr 5390
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3or 1104  df-3an 1105  df-tru 1572  df-fal 1582  df-ex 1812  df-nf 1816  df-sb 2099  df-mo 2564  df-eu 2594  df-clab 2739  df-cleq 2752  df-clel 2835  df-ne 2956  df-ral 3077  df-rex 3087  df-rab 3413  df-v 3452  df-ss 3896  df-pss 4014  df-dif 4047  df-in 4091  df-un 4151  df-nul 4279  df-if 4482  df-pw 4558  df-sn 4584  df-pr 4586  df-op 4590  df-uni 4867  df-br 5103  df-opab 5167  df-tr 5212  df-id 5545  df-eprel 5550  df-po 5558  df-so 5559  df-fr 5603  df-we 5605  df-xp 5656  df-rel 5657  df-cnv 5658  df-co 5659  df-dm 5660  df-rn 5661  df-res 5662  df-ima 5663  df-ord 6365  df-on 6366  df-iota 6494  df-fun 6540  df-fn 6541  df-f 6542  df-f1 6543  df-fo 6544  df-f1o 6545  df-fv 6546  df-isom 6547
This theorem is used by:  dfac15  35802
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