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Theorem tgptmd 23230
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 2738 . . 3 (TopOpen‘𝐺) = (TopOpen‘𝐺)
2 eqid 2738 . . 3 (invg𝐺) = (invg𝐺)
31, 2istgp 23228 . 2 (𝐺 ∈ TopGrp ↔ (𝐺 ∈ Grp ∧ 𝐺 ∈ TopMnd ∧ (invg𝐺) ∈ ((TopOpen‘𝐺) Cn (TopOpen‘𝐺))))
43simp2bi 1145 1 (𝐺 ∈ TopGrp → 𝐺 ∈ TopMnd)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wcel 2106  cfv 6433  (class class class)co 7275  TopOpenctopn 17132  Grpcgrp 18577  invgcminusg 18578   Cn ccn 22375  TopMndctmd 23221  TopGrpctgp 23222
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1798  ax-4 1812  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 2709  ax-nul 5230
This theorem depends on definitions:  df-bi 206  df-an 397  df-or 845  df-3an 1088  df-tru 1542  df-fal 1552  df-ex 1783  df-nf 1787  df-sb 2068  df-mo 2540  df-eu 2569  df-clab 2716  df-cleq 2730  df-clel 2816  df-ral 3069  df-rex 3070  df-rab 3073  df-v 3434  df-sbc 3717  df-dif 3890  df-un 3892  df-in 3894  df-ss 3904  df-nul 4257  df-if 4460  df-sn 4562  df-pr 4564  df-op 4568  df-uni 4840  df-br 5075  df-iota 6391  df-fv 6441  df-ov 7278  df-tgp 23224
This theorem is referenced by:  tgptps  23231  tgpcn  23235  tgpsubcn  23241  tgpmulg  23244  oppgtgp  23249  tgplacthmeo  23254  subgtgp  23256  clsnsg  23261  tgpt0  23270  prdstgpd  23276  tsmssub  23300  tsmsxp  23306  trgtmd2  23320  nlmtlm  23858  qqhcn  31941
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