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Theorem omordlim 8633
Description: Ordering involving the product of a limit ordinal. Proposition 8.23 of [TakeutiZaring] p. 64. (Contributed by NM, 25-Dec-2004.)
Assertion
Ref Expression
omordlim (((𝐴 ∈ On ∧ (𝐵𝐷 ∧ Lim 𝐵)) ∧ 𝐶 ∈ (𝐴 ·o 𝐵)) → ∃𝑥𝐵 𝐶 ∈ (𝐴 ·o 𝑥))
Distinct variable groups:   𝑥,𝐴   𝑥,𝐵   𝑥,𝐶
Allowed substitution hint:   𝐷(𝑥)

Proof of Theorem omordlim
StepHypRef Expression
1 omlim 8589 . . . 4 ((𝐴 ∈ On ∧ (𝐵𝐷 ∧ Lim 𝐵)) → (𝐴 ·o 𝐵) = 𝑥𝐵 (𝐴 ·o 𝑥))
21eleq2d 2830 . . 3 ((𝐴 ∈ On ∧ (𝐵𝐷 ∧ Lim 𝐵)) → (𝐶 ∈ (𝐴 ·o 𝐵) ↔ 𝐶 𝑥𝐵 (𝐴 ·o 𝑥)))
3 eliun 5019 . . 3 (𝐶 𝑥𝐵 (𝐴 ·o 𝑥) ↔ ∃𝑥𝐵 𝐶 ∈ (𝐴 ·o 𝑥))
42, 3bitrdi 287 . 2 ((𝐴 ∈ On ∧ (𝐵𝐷 ∧ Lim 𝐵)) → (𝐶 ∈ (𝐴 ·o 𝐵) ↔ ∃𝑥𝐵 𝐶 ∈ (𝐴 ·o 𝑥)))
54biimpa 476 1 (((𝐴 ∈ On ∧ (𝐵𝐷 ∧ Lim 𝐵)) ∧ 𝐶 ∈ (𝐴 ·o 𝐵)) → ∃𝑥𝐵 𝐶 ∈ (𝐴 ·o 𝑥))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 395  wcel 2108  wrex 3076   ciun 5015  Oncon0 6395  Lim wlim 6396  (class class class)co 7448   ·o comu 8520
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1793  ax-4 1807  ax-5 1909  ax-6 1967  ax-7 2007  ax-8 2110  ax-9 2118  ax-10 2141  ax-11 2158  ax-12 2178  ax-ext 2711  ax-rep 5303  ax-sep 5317  ax-nul 5324  ax-pr 5447  ax-un 7770
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 847  df-3or 1088  df-3an 1089  df-tru 1540  df-fal 1550  df-ex 1778  df-nf 1782  df-sb 2065  df-mo 2543  df-eu 2572  df-clab 2718  df-cleq 2732  df-clel 2819  df-nfc 2895  df-ne 2947  df-ral 3068  df-rex 3077  df-reu 3389  df-rab 3444  df-v 3490  df-sbc 3805  df-csb 3922  df-dif 3979  df-un 3981  df-in 3983  df-ss 3993  df-pss 3996  df-nul 4353  df-if 4549  df-pw 4624  df-sn 4649  df-pr 4651  df-op 4655  df-uni 4932  df-iun 5017  df-br 5167  df-opab 5229  df-mpt 5250  df-tr 5284  df-id 5593  df-eprel 5599  df-po 5607  df-so 5608  df-fr 5652  df-we 5654  df-xp 5706  df-rel 5707  df-cnv 5708  df-co 5709  df-dm 5710  df-rn 5711  df-res 5712  df-ima 5713  df-pred 6332  df-ord 6398  df-on 6399  df-lim 6400  df-suc 6401  df-iota 6525  df-fun 6575  df-fn 6576  df-f 6577  df-f1 6578  df-fo 6579  df-f1o 6580  df-fv 6581  df-ov 7451  df-oprab 7452  df-mpo 7453  df-2nd 8031  df-frecs 8322  df-wrecs 8353  df-recs 8427  df-rdg 8466  df-omul 8527
This theorem is referenced by:  odi  8635  omass  8636  oaabs2  8705
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