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Theorem tgptmd 24398
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 2761 . . 3 (TopOpen‘𝐺) = (TopOpen‘𝐺)
2 eqid 2761 . . 3 (invg‘𝐺) = (invg‘𝐺)
31, 2istgp 24396 . 2 (𝐺 ∈ TopGrp ↔ (𝐺 ∈ Grp ∧ 𝐺 ∈ TopMnd ∧ (invg‘𝐺) ∈ ((TopOpen‘𝐺) Cn (TopOpen‘𝐺))))
43simp2bi 1164 1 (𝐺 ∈ TopGrp → 𝐺 ∈ TopMnd)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   → wi 4   ∈ wcel 2145  ‘cfv 6538  (class class class)co 7420  TopOpenctopn 17592  Grpcgrp 19144  invgcminusg 19145   Cn ccn 23542  TopMndctmd 24389  TopGrpctgp 24390
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1943  ax-6 2000  ax-7 2041  ax-8 2147  ax-9 2155  ax-ext 2733  ax-nul 5260
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-sb 2100  df-clab 2740  df-cleq 2753  df-clel 2836  df-ne 2957  df-rab 3414  df-v 3453  df-sbc 3740  df-dif 3902  df-un 3904  df-in 3906  df-ss 3916  df-nul 4280  df-if 4483  df-sn 4585  df-pr 4587  df-op 4591  df-uni 4868  df-br 5104  df-iota 6494  df-fv 6546  df-ov 7423  df-tgp 24392
This theorem is used by:  tgptps  24399  tgpcn  24403  tgpsubcn  24409  tgpmulg  24412  oppgtgp  24417  tgplacthmeo  24422  subgtgp  24424  clsnsg  24429  tgpt0  24438  prdstgpd  24444  tsmssub  24468  tsmsxp  24474  trgtmd2  24488  nlmtlm  25013  qqhcn  34623
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