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Theorem tgptmd 23973
Description: A topological group is a topological monoid. (Contributed by Mario Carneiro, 19-Sep-2015.)
Assertion
Ref Expression
tgptmd (𝐺 ∈ TopGrp → 𝐺 ∈ TopMnd)

Proof of Theorem tgptmd
StepHypRef Expression
1 eqid 2730 . . 3 (TopOpen‘𝐺) = (TopOpen‘𝐺)
2 eqid 2730 . . 3 (invg𝐺) = (invg𝐺)
31, 2istgp 23971 . 2 (𝐺 ∈ TopGrp ↔ (𝐺 ∈ Grp ∧ 𝐺 ∈ TopMnd ∧ (invg𝐺) ∈ ((TopOpen‘𝐺) Cn (TopOpen‘𝐺))))
43simp2bi 1146 1 (𝐺 ∈ TopGrp → 𝐺 ∈ TopMnd)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wcel 2109  cfv 6514  (class class class)co 7390  TopOpenctopn 17391  Grpcgrp 18872  invgcminusg 18873   Cn ccn 23118  TopMndctmd 23964  TopGrpctgp 23965
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 2008  ax-8 2111  ax-9 2119  ax-ext 2702  ax-nul 5264
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-sb 2066  df-clab 2709  df-cleq 2722  df-clel 2804  df-ne 2927  df-rab 3409  df-v 3452  df-sbc 3757  df-dif 3920  df-un 3922  df-in 3924  df-ss 3934  df-nul 4300  df-if 4492  df-sn 4593  df-pr 4595  df-op 4599  df-uni 4875  df-br 5111  df-iota 6467  df-fv 6522  df-ov 7393  df-tgp 23967
This theorem is referenced by:  tgptps  23974  tgpcn  23978  tgpsubcn  23984  tgpmulg  23987  oppgtgp  23992  tgplacthmeo  23997  subgtgp  23999  clsnsg  24004  tgpt0  24013  prdstgpd  24019  tsmssub  24043  tsmsxp  24049  trgtmd2  24063  nlmtlm  24589  qqhcn  33988
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