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Theorem dprdval0prc 19118
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 3124 . . 3 (dom 𝑆 ∉ V ↔ ¬ dom 𝑆 ∈ V)
2 dmexg 7607 . . . 4 (𝑆 ∈ V → dom 𝑆 ∈ V)
32con3i 157 . . 3 (¬ dom 𝑆 ∈ V → ¬ 𝑆 ∈ V)
41, 3sylbi 219 . 2 (dom 𝑆 ∉ V → ¬ 𝑆 ∈ V)
5 reldmdprd 19113 . . 3 Rel dom DProd
65ovprc2 7190 . 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 1533  wcel 2110  wnel 3123  Vcvv 3494  c0 4290  dom cdm 5549  (class class class)co 7150   DProd cdprd 19109
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1792  ax-4 1806  ax-5 1907  ax-6 1966  ax-7 2011  ax-8 2112  ax-9 2120  ax-10 2141  ax-11 2157  ax-12 2173  ax-ext 2793  ax-sep 5195  ax-nul 5202  ax-pow 5258  ax-pr 5321  ax-un 7455
This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1085  df-tru 1536  df-ex 1777  df-nf 1781  df-sb 2066  df-mo 2618  df-eu 2650  df-clab 2800  df-cleq 2814  df-clel 2893  df-nfc 2963  df-nel 3124  df-ral 3143  df-rex 3144  df-rab 3147  df-v 3496  df-dif 3938  df-un 3940  df-in 3942  df-ss 3951  df-nul 4291  df-if 4467  df-sn 4561  df-pr 4563  df-op 4567  df-uni 4832  df-br 5059  df-opab 5121  df-xp 5555  df-rel 5556  df-cnv 5557  df-dm 5559  df-rn 5560  df-iota 6308  df-fv 6357  df-ov 7153  df-oprab 7154  df-mpo 7155  df-dprd 19111
This theorem is referenced by: (None)
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