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Theorem weiunwe 37179
Description: A well-ordering on an indexed union can be constructed from a well-ordering on its index class and a collection of well-orderings on its members. (Contributed by Matthew House, 23-Aug-2025.)
Hypotheses
Ref Expression
weiun.1 𝐹 = (𝑤 𝑥𝐴 𝐵 ↦ (𝑢 ∈ {𝑥𝐴𝑤𝐵}∀𝑣 ∈ {𝑥𝐴𝑤𝐵} ¬ 𝑣𝑅𝑢))
weiun.2 𝑇 = {⟨𝑦, 𝑧⟩ ∣ ((𝑦 𝑥𝐴 𝐵𝑧 𝑥𝐴 𝐵) ∧ ((𝐹𝑦)𝑅(𝐹𝑧) ∨ ((𝐹𝑦) = (𝐹𝑧) ∧ 𝑦(𝐹𝑦) / 𝑥𝑆𝑧)))}
Assertion
Ref Expression
weiunwe ((𝑅 We 𝐴𝑅 Se 𝐴 ∧ ∀𝑥𝐴 𝑆 We 𝐵) → 𝑇 We 𝑥𝐴 𝐵)
Distinct variable groups:   𝑢,𝐴,𝑣,𝑤,𝑥   𝑦,𝐴,𝑧,𝑥   𝑢,𝐵,𝑣,𝑤   𝑦,𝐵,𝑧   𝑦,𝐹,𝑧   𝑢,𝑅,𝑣,𝑤   𝑦,𝑅,𝑧   𝑦,𝑆,𝑧
Allowed substitution hints:   𝐵(𝑥)   𝑅(𝑥)   𝑆(𝑥, 𝑤, 𝑣, 𝑢)   𝑇(𝑥, 𝑦, 𝑧, 𝑤, 𝑣, 𝑢)   𝐹(𝑥, 𝑤, 𝑣, 𝑢)

Proof of Theorem weiunwe
StepHypRef Expression
1 wefr 5637 . . . 4 (𝑆 We 𝐵𝑆 Fr 𝐵)
21ralimi 3099 . . 3 (∀𝑥𝐴 𝑆 We 𝐵 → ∀𝑥𝐴 𝑆 Fr 𝐵)
3 weiun.1 . . . 4 𝐹 = (𝑤 𝑥𝐴 𝐵 ↦ (𝑢 ∈ {𝑥𝐴𝑤𝐵}∀𝑣 ∈ {𝑥𝐴𝑤𝐵} ¬ 𝑣𝑅𝑢))
4 weiun.2 . . . 4 𝑇 = {⟨𝑦, 𝑧⟩ ∣ ((𝑦 𝑥𝐴 𝐵𝑧 𝑥𝐴 𝐵) ∧ ((𝐹𝑦)𝑅(𝐹𝑧) ∨ ((𝐹𝑦) = (𝐹𝑧) ∧ 𝑦(𝐹𝑦) / 𝑥𝑆𝑧)))}
53, 4weiunfr 37177 . . 3 ((𝑅 We 𝐴𝑅 Se 𝐴 ∧ ∀𝑥𝐴 𝑆 Fr 𝐵) → 𝑇 Fr 𝑥𝐴 𝐵)
62, 5syl3an3 1183 . 2 ((𝑅 We 𝐴𝑅 Se 𝐴 ∧ ∀𝑥𝐴 𝑆 We 𝐵) → 𝑇 Fr 𝑥𝐴 𝐵)
7 weso 5638 . . . 4 (𝑆 We 𝐵𝑆 Or 𝐵)
87ralimi 3099 . . 3 (∀𝑥𝐴 𝑆 We 𝐵 → ∀𝑥𝐴 𝑆 Or 𝐵)
93, 4weiunso 37176 . . 3 ((𝑅 We 𝐴𝑅 Se 𝐴 ∧ ∀𝑥𝐴 𝑆 Or 𝐵) → 𝑇 Or 𝑥𝐴 𝐵)
108, 9syl3an3 1183 . 2 ((𝑅 We 𝐴𝑅 Se 𝐴 ∧ ∀𝑥𝐴 𝑆 We 𝐵) → 𝑇 Or 𝑥𝐴 𝐵)
11 df-we 5602 . 2 (𝑇 We 𝑥𝐴 𝐵 ↔ (𝑇 Fr 𝑥𝐴 𝐵𝑇 Or 𝑥𝐴 𝐵))
126, 10, 11sylanbrc 595 1 ((𝑅 We 𝐴𝑅 Se 𝐴 ∧ ∀𝑥𝐴 𝑆 We 𝐵) → 𝑇 We 𝑥𝐴 𝐵)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:  ¬ wn 3  wi 4  wa 401  wo 861  w3a 1103   = wceq 1570  wcel 2145  wral 3076  {crab 3412  csb 3846   ciun 4950   class class class wbr 5102  {copab 5166  cmpt 5185   Or wor 5554   Fr wfr 5597   Se wse 5598   We wwe 5599  cfv 6527  crio 7364
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 2732  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 1573  df-fal 1583  df-ex 1813  df-nf 1817  df-sb 2100  df-mo 2564  df-eu 2594  df-clab 2739  df-cleq 2752  df-clel 2835  df-nfc 2909  df-ne 2956  df-ral 3077  df-rex 3087  df-rmo 3365  df-reu 3366  df-rab 3413  df-v 3452  df-sbc 3739  df-csb 3847  df-dif 3901  df-un 3903  df-in 3905  df-ss 3915  df-nul 4279  df-if 4482  df-pw 4558  df-sn 4584  df-pr 4586  df-op 4590  df-uni 4867  df-iun 4952  df-br 5103  df-opab 5167  df-mpt 5186  df-id 5542  df-po 5555  df-so 5556  df-fr 5600  df-se 5601  df-we 5602  df-xp 5653  df-rel 5654  df-cnv 5655  df-co 5656  df-dm 5657  df-rn 5658  df-res 5659  df-ima 5660  df-iota 6483  df-fun 6529  df-fn 6530  df-f 6531  df-fv 6535  df-riota 7365
This theorem is used by:  numiunnum  37180
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