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Theorem dprdval0prc 19126
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 3126 . . 3 (dom 𝑆 ∉ V ↔ ¬ dom 𝑆 ∈ V)
2 dmexg 7615 . . . 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 19121 . . 3 Rel dom DProd
65ovprc2 7198 . 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 1537  wcel 2114  wnel 3125  Vcvv 3496  c0 4293  dom cdm 5557  (class class class)co 7158   DProd cdprd 19117
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2116  ax-9 2124  ax-10 2145  ax-11 2161  ax-12 2177  ax-ext 2795  ax-sep 5205  ax-nul 5212  ax-pow 5268  ax-pr 5332  ax-un 7463
This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1085  df-tru 1540  df-ex 1781  df-nf 1785  df-sb 2070  df-mo 2622  df-eu 2654  df-clab 2802  df-cleq 2816  df-clel 2895  df-nfc 2965  df-nel 3126  df-ral 3145  df-rex 3146  df-rab 3149  df-v 3498  df-dif 3941  df-un 3943  df-in 3945  df-ss 3954  df-nul 4294  df-if 4470  df-sn 4570  df-pr 4572  df-op 4576  df-uni 4841  df-br 5069  df-opab 5131  df-xp 5563  df-rel 5564  df-cnv 5565  df-dm 5567  df-rn 5568  df-iota 6316  df-fv 6365  df-ov 7161  df-oprab 7162  df-mpo 7163  df-dprd 19119
This theorem is referenced by: (None)
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