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Theorem dprdval0prc 20023
Description: The internal direct product of a family of subgroups indexed by a proper class is empty. (Contributed by AV, 13-Jul-2019.)
Assertion
Ref Expression
dprdval0prc (dom 𝑆 ∉ V → (𝐺 DProd 𝑆) = ∅)

Proof of Theorem dprdval0prc
StepHypRef Expression
1 df-nel 3046 . . 3 (dom 𝑆 ∉ V ↔ ¬ dom 𝑆 ∈ V)
2 dmexg 7924 . . . 4 (𝑆 ∈ V → dom 𝑆 ∈ V)
32con3i 154 . . 3 (¬ dom 𝑆 ∈ V → ¬ 𝑆 ∈ V)
41, 3sylbi 217 . 2 (dom 𝑆 ∉ V → ¬ 𝑆 ∈ V)
5 reldmdprd 20018 . . 3 Rel dom DProd
65ovprc2 7472 . 2 𝑆 ∈ V → (𝐺 DProd 𝑆) = ∅)
74, 6syl 17 1 (dom 𝑆 ∉ V → (𝐺 DProd 𝑆) = ∅)
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4   = wceq 1539  wcel 2107  wnel 3045  Vcvv 3479  c0 4332  dom cdm 5684  (class class class)co 7432   DProd cdprd 20014
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1794  ax-4 1808  ax-5 1909  ax-6 1966  ax-7 2006  ax-8 2109  ax-9 2117  ax-10 2140  ax-11 2156  ax-12 2176  ax-ext 2707  ax-sep 5295  ax-nul 5305  ax-pr 5431  ax-un 7756
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1542  df-fal 1552  df-ex 1779  df-nf 1783  df-sb 2064  df-mo 2539  df-eu 2568  df-clab 2714  df-cleq 2728  df-clel 2815  df-nfc 2891  df-nel 3046  df-ral 3061  df-rex 3070  df-rab 3436  df-v 3481  df-dif 3953  df-un 3955  df-in 3957  df-ss 3967  df-nul 4333  df-if 4525  df-sn 4626  df-pr 4628  df-op 4632  df-uni 4907  df-br 5143  df-opab 5205  df-xp 5690  df-rel 5691  df-cnv 5692  df-dm 5694  df-rn 5695  df-iota 6513  df-fv 6568  df-ov 7435  df-oprab 7436  df-mpo 7437  df-dprd 20016
This theorem is referenced by: (None)
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