Theorem reldmdprd 20041

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 20039	. 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 7584	1 ⊢ Rel dom DProd

Syntax hints:   ∧ wa 395   = wceq 1537  {cab 2717  ∀wral 3067  {crab 3443   ∖ cdif 3973   ∩ cin 3975   ⊆ wss 3976  {csn 4648  ∪ cuni 4931   class class class wbr 5166   ↦ cmpt 5249  dom cdm 5700  ran crn 5701   “ cima 5703  Rel wrel 5705  ⟶wf 6569  ‘cfv 6573  (class class class)co 7448  Xcixp 8955   finSupp cfsupp 9431  0_gc0g 17499   Σ_g cgsu 17500  mrClscmrc 17641  Grpcgrp 18973  SubGrpcsubg 19160  Cntzccntz 19355   DProd cdprd 20037

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1793  ax-4 1807  ax-5 1909  ax-6 1967  ax-7 2007  ax-8 2110  ax-9 2118  ax-10 2141  ax-11 2158  ax-12 2178  ax-ext 2711  ax-sep 5317  ax-nul 5324  ax-pr 5447

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 847  df-3an 1089  df-tru 1540  df-fal 1550  df-ex 1778  df-nf 1782  df-sb 2065  df-mo 2543  df-eu 2572  df-clab 2718  df-cleq 2732  df-clel 2819  df-nfc 2895  df-rab 3444  df-v 3490  df-dif 3979  df-un 3981  df-ss 3993  df-nul 4353  df-if 4549  df-sn 4649  df-pr 4651  df-op 4655  df-br 5167  df-opab 5229  df-xp 5706  df-rel 5707  df-dm 5710  df-oprab 7452  df-mpo 7453  df-dprd 20039

This theorem is referenced by:  dprddomprc  20044  dprdval0prc  20046  dprdval  20047  dprdgrp  20049  dprdf  20050  dprdssv  20060  subgdmdprd  20078  dprd2da  20086  dpjfval  20099