Theorem reldmdprd 19112

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 19110	. 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 7264	1 ⊢ Rel dom DProd

Syntax hints:   ∧ wa 399   = wceq 1538  {cab 2776  ∀wral 3106  {crab 3110   ∖ cdif 3878   ∩ cin 3880   ⊆ wss 3881  {csn 4525  ∪ cuni 4800   class class class wbr 5030   ↦ cmpt 5110  dom cdm 5519  ran crn 5520   “ cima 5522  Rel wrel 5524  ⟶wf 6320  ‘cfv 6324  (class class class)co 7135  Xcixp 8444   finSupp cfsupp 8817  0_gc0g 16705   Σ_g cgsu 16706  mrClscmrc 16846  Grpcgrp 18095  SubGrpcsubg 18265  Cntzccntz 18437   DProd cdprd 19108

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 1911  ax-6 1970  ax-7 2015  ax-8 2113  ax-9 2121  ax-10 2142  ax-11 2158  ax-12 2175  ax-ext 2770  ax-sep 5167  ax-nul 5174  ax-pr 5295

This theorem depends on definitions:  df-bi 210  df-an 400  df-or 845  df-3an 1086  df-tru 1541  df-ex 1782  df-nf 1786  df-sb 2070  df-mo 2598  df-eu 2629  df-clab 2777  df-cleq 2791  df-clel 2870  df-nfc 2938  df-v 3443  df-dif 3884  df-un 3886  df-in 3888  df-ss 3898  df-nul 4244  df-if 4426  df-sn 4526  df-pr 4528  df-op 4532  df-br 5031  df-opab 5093  df-xp 5525  df-rel 5526  df-dm 5529  df-oprab 7139  df-mpo 7140  df-dprd 19110

This theorem is referenced by:  dprddomprc  19115  dprdval0prc  19117  dprdval  19118  dprdgrp  19120  dprdf  19121  dprdssv  19131  subgdmdprd  19149  dprd2da  19157  dpjfval  19170