Theorem reldmdprd 19869

Description: The domain of the internal direct product operation is a relation. (Contributed by Mario Carneiro, 25-Apr-2016.) (Proof shortened by AV, 11-Jul-2019.)

Assertion

Ref	Expression
reldmdprd	⊢ Rel dom DProd

Proof of Theorem reldmdprd

Dummy variables 𝑔 ℎ 𝑓 𝑠 𝑥 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		df-dprd 19867	. 2 ⊢ DProd = (𝑔 ∈ Grp, 𝑠 ∈ {ℎ ∣ (ℎ:dom ℎ⟶(SubGrp‘𝑔) ∧ ∀𝑥 ∈ dom ℎ(∀𝑦 ∈ (dom ℎ ∖ {𝑥})(ℎ‘𝑥) ⊆ ((Cntz‘𝑔)‘(ℎ‘𝑦)) ∧ ((ℎ‘𝑥) ∩ ((mrCls‘(SubGrp‘𝑔))‘∪ (ℎ “ (dom ℎ ∖ {𝑥})))) = {(0g‘𝑔)}))} ↦ ran (𝑓 ∈ {ℎ ∈ X𝑥 ∈ dom 𝑠(𝑠‘𝑥) ∣ ℎ finSupp (0g‘𝑔)} ↦ (𝑔 Σg 𝑓)))
2	1	reldmmpo 7545	1 ⊢ Rel dom DProd

Syntax hints:   ∧ wa 396   = wceq 1541  {cab 2709  ∀wral 3061  {crab 3432   ∖ cdif 3945   ∩ cin 3947   ⊆ wss 3948  {csn 4628  ∪ cuni 4908   class class class wbr 5148   ↦ cmpt 5231  dom cdm 5676  ran crn 5677   “ cima 5679  Rel wrel 5681  ⟶wf 6539  ‘cfv 6543  (class class class)co 7411  Xcixp 8893   finSupp cfsupp 9363  0_gc0g 17387   Σ_g cgsu 17388  mrClscmrc 17529  Grpcgrp 18821  SubGrpcsubg 19002  Cntzccntz 19181   DProd cdprd 19865

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1913  ax-6 1971  ax-7 2011  ax-8 2108  ax-9 2116  ax-10 2137  ax-11 2154  ax-12 2171  ax-ext 2703  ax-sep 5299  ax-nul 5306  ax-pr 5427

This theorem depends on definitions:  df-bi 206  df-an 397  df-or 846  df-3an 1089  df-tru 1544  df-fal 1554  df-ex 1782  df-nf 1786  df-sb 2068  df-mo 2534  df-eu 2563  df-clab 2710  df-cleq 2724  df-clel 2810  df-nfc 2885  df-rab 3433  df-v 3476  df-dif 3951  df-un 3953  df-in 3955  df-ss 3965  df-nul 4323  df-if 4529  df-sn 4629  df-pr 4631  df-op 4635  df-br 5149  df-opab 5211  df-xp 5682  df-rel 5683  df-dm 5686  df-oprab 7415  df-mpo 7416  df-dprd 19867

This theorem is referenced by:  dprddomprc  19872  dprdval0prc  19874  dprdval  19875  dprdgrp  19877  dprdf  19878  dprdssv  19888  subgdmdprd  19906  dprd2da  19914  dpjfval  19927