Theorem reldmdprd 19980

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 19978	. 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 7541	1 ⊢ Rel dom DProd

Syntax hints:   ∧ wa 395   = wceq 1540  {cab 2713  ∀wral 3051  {crab 3415   ∖ cdif 3923   ∩ cin 3925   ⊆ wss 3926  {csn 4601  ∪ cuni 4883   class class class wbr 5119   ↦ cmpt 5201  dom cdm 5654  ran crn 5655   “ cima 5657  Rel wrel 5659  ⟶wf 6527  ‘cfv 6531  (class class class)co 7405  Xcixp 8911   finSupp cfsupp 9373  0_gc0g 17453   Σ_g cgsu 17454  mrClscmrc 17595  Grpcgrp 18916  SubGrpcsubg 19103  Cntzccntz 19298   DProd cdprd 19976

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2007  ax-8 2110  ax-9 2118  ax-10 2141  ax-11 2157  ax-12 2177  ax-ext 2707  ax-sep 5266  ax-nul 5276  ax-pr 5402

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-nf 1784  df-sb 2065  df-mo 2539  df-eu 2568  df-clab 2714  df-cleq 2727  df-clel 2809  df-nfc 2885  df-rab 3416  df-v 3461  df-dif 3929  df-un 3931  df-ss 3943  df-nul 4309  df-if 4501  df-sn 4602  df-pr 4604  df-op 4608  df-br 5120  df-opab 5182  df-xp 5660  df-rel 5661  df-dm 5664  df-oprab 7409  df-mpo 7410  df-dprd 19978

This theorem is referenced by:  dprddomprc  19983  dprdval0prc  19985  dprdval  19986  dprdgrp  19988  dprdf  19989  dprdssv  19999  subgdmdprd  20017  dprd2da  20025  dpjfval  20038