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Theorem sgrpcl 18774
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 18772 . 2 (𝐺 ∈ Smgrp → 𝐺 ∈ Mgm)
2 sgrpass.b . . 3 𝐵 = (Base‘𝐺)
3 sgrpass.o . . 3 = (+g𝐺)
42, 3mgmcl 18691 . 2 ((𝐺 ∈ Mgm ∧ 𝑋𝐵𝑌𝐵) → (𝑋 𝑌) ∈ 𝐵)
51, 4syl3an1 1179 1 ((𝐺 ∈ Smgrp ∧ 𝑋𝐵𝑌𝐵) → (𝑋 𝑌) ∈ 𝐵)
Colors of variables: wff setvar class
Syntax hints:  wi 4  w3a 1101   = wceq 1563  wcel 2145  cfv 6525  (class class class)co 7400  Basecbs 17259  +gcplusg 17300  Mgmcmgm 18686  Smgrpcsgrp 18766
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1818  ax-4 1832  ax-5 1933  ax-6 1990  ax-7 2031  ax-8 2147  ax-9 2155  ax-ext 2737  ax-nul 5261
This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1103  df-tru 1566  df-fal 1576  df-ex 1803  df-sb 2094  df-clab 2744  df-cleq 2757  df-clel 2840  df-ne 2961  df-ral 3080  df-rab 3418  df-v 3459  df-sbc 3748  df-dif 3910  df-un 3912  df-ss 3924  df-nul 4289  df-if 4484  df-sn 4586  df-pr 4588  df-op 4592  df-uni 4869  df-br 5106  df-iota 6481  df-fv 6533  df-ov 7403  df-mgm 18688  df-sgrp 18767
This theorem is referenced by:  sgrppropd  18779  prdsplusgsgrpcl  18780  cntzsgrpcl  19395  rngpropd  20243
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