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Theorem sgrpcl 18686
Description: Closure of the operation of a semigroup. (Contributed by AV, 15-Feb-2025.)
Hypotheses
Ref Expression
sgrpass.b 𝐵 = (Base‘𝐺)
sgrpass.o = (+g𝐺)
Assertion
Ref Expression
sgrpcl ((𝐺 ∈ Smgrp ∧ 𝑋𝐵𝑌𝐵) → (𝑋 𝑌) ∈ 𝐵)

Proof of Theorem sgrpcl
StepHypRef Expression
1 sgrpmgm 18684 . 2 (𝐺 ∈ Smgrp → 𝐺 ∈ Mgm)
2 sgrpass.b . . 3 𝐵 = (Base‘𝐺)
3 sgrpass.o . . 3 = (+g𝐺)
42, 3mgmcl 18603 . 2 ((𝐺 ∈ Mgm ∧ 𝑋𝐵𝑌𝐵) → (𝑋 𝑌) ∈ 𝐵)
51, 4syl3an1 1161 1 ((𝐺 ∈ Smgrp ∧ 𝑋𝐵𝑌𝐵) → (𝑋 𝑌) ∈ 𝐵)
Colors of variables: wff setvar class
Syntax hints:  wi 4  w3a 1085   = wceq 1534  wcel 2099  cfv 6548  (class class class)co 7420  Basecbs 17180  +gcplusg 17233  Mgmcmgm 18598  Smgrpcsgrp 18678
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1790  ax-4 1804  ax-5 1906  ax-6 1964  ax-7 2004  ax-8 2101  ax-9 2109  ax-ext 2699  ax-nul 5306
This theorem depends on definitions:  df-bi 206  df-an 396  df-or 847  df-3an 1087  df-tru 1537  df-fal 1547  df-ex 1775  df-sb 2061  df-clab 2706  df-cleq 2720  df-clel 2806  df-ne 2938  df-ral 3059  df-rab 3430  df-v 3473  df-sbc 3777  df-dif 3950  df-un 3952  df-in 3954  df-ss 3964  df-nul 4324  df-if 4530  df-sn 4630  df-pr 4632  df-op 4636  df-uni 4909  df-br 5149  df-iota 6500  df-fv 6556  df-ov 7423  df-mgm 18600  df-sgrp 18679
This theorem is referenced by:  sgrppropd  18691  prdsplusgsgrpcl  18692  cntzsgrpcl  19285  rngpropd  20114
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