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Theorem wevonprcf1o 35865
Description: If 𝑅 is a set-like well-ordering of the universe and 𝐴 is a proper class, then 𝐹 is a bijection from the ordinals to 𝐴. This is the ZFC version of (4 → 5) in https://tinyurl.com/hamkins-gblac. (Contributed by BTernaryTau, 9-Jun-2026.)
Hypothesis
Ref Expression
wevonprcf1o.1 𝐹 = OrdIso(𝑅, 𝐴)
Assertion
Ref Expression
wevonprcf1o ((𝑅 We V ∧ 𝑅 Se V ∧ ¬ 𝐴 ∈ V) → 𝐹:On–1-1-onto→𝐴)

Proof of Theorem wevonprcf1o
StepHypRef Expression
1 ssv 3955 . . . 4 𝐴 ⊆ V
2 wess 5637 . . . 4 (𝐴 ⊆ V → (𝑅 We V → 𝑅 We 𝐴))
31, 2ax-mp 5 . . 3 (𝑅 We V → 𝑅 We 𝐴)
4 sess2 5617 . . . 4 (𝐴 ⊆ V → (𝑅 Se V → 𝑅 Se 𝐴))
51, 4ax-mp 5 . . 3 (𝑅 Se V → 𝑅 Se 𝐴)
6 id 23 . . 3 (¬ 𝐴 ∈ V → ¬ 𝐴 ∈ V)
73, 5, 63anim123i 1169 . 2 ((𝑅 We V ∧ 𝑅 Se V ∧ ¬ 𝐴 ∈ V) → (𝑅 We 𝐴 ∧ 𝑅 Se 𝐴 ∧ ¬ 𝐴 ∈ V))
8 wevonprcf1o.1 . . 3 𝐹 = OrdIso(𝑅, 𝐴)
98ordtypeon 35698 . 2 ((𝑅 We 𝐴 ∧ 𝑅 Se 𝐴 ∧ ¬ 𝐴 ∈ V) → 𝐹 Isom E , 𝑅 (On, 𝐴))
10 isof1o 7323 . 2 (𝐹 Isom E , 𝑅 (On, 𝐴) → 𝐹:On–1-1-onto→𝐴)
117, 9, 103syl 19 1 ((𝑅 We V ∧ 𝑅 Se V ∧ ¬ 𝐴 ∈ V) → 𝐹:On–1-1-onto→𝐴)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:  ¬ wn 3   → wi 4   ∧ w3a 1103   = wceq 1570   ∈ wcel 2145  Vcvv 3451   ⊆ wss 3899   E cep 5550   Se wse 5602   We wwe 5603  Oncon0 6355  –1-1-onto→wf1o 6530   Isom wiso 6532  OrdIsocoi 9487
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1943  ax-6 2000  ax-7 2041  ax-8 2147  ax-9 2155  ax-10 2178  ax-11 2194  ax-12 2213  ax-ext 2733  ax-rep 5232  ax-sep 5249  ax-nul 5260  ax-pr 5391  ax-un 7740
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3or 1104  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-nf 1817  df-sb 2100  df-mo 2565  df-eu 2595  df-clab 2740  df-cleq 2753  df-clel 2836  df-nfc 2910  df-ne 2957  df-ral 3078  df-rex 3088  df-rmo 3366  df-reu 3367  df-rab 3414  df-v 3453  df-sbc 3740  df-csb 3848  df-dif 3902  df-un 3904  df-in 3906  df-ss 3916  df-pss 3919  df-nul 4280  df-if 4483  df-pw 4559  df-sn 4585  df-pr 4587  df-op 4591  df-uni 4868  df-iun 4953  df-br 5104  df-opab 5168  df-mpt 5187  df-tr 5213  df-id 5546  df-eprel 5551  df-po 5559  df-so 5560  df-fr 5604  df-se 5605  df-we 5606  df-xp 5657  df-rel 5658  df-cnv 5659  df-co 5660  df-dm 5661  df-rn 5662  df-res 5663  df-ima 5664  df-pred 6297  df-ord 6358  df-on 6359  df-lim 6360  df-suc 6361  df-iota 6487  df-fun 6533  df-fn 6534  df-f 6535  df-f1 6536  df-fo 6537  df-f1o 6538  df-fv 6539  df-isom 6540  df-riota 7369  df-ov 7415  df-2nd 7991  df-frecs 8283  df-wrecs 8314  df-recs 8363  df-oi 9488
This theorem is used by: (None)
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