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Theorem sgrpcl 18764
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 18762 . 2 (𝐺 ∈ Smgrp → 𝐺 ∈ Mgm)
2 sgrpass.b . . 3 𝐵 = (Base‘𝐺)
3 sgrpass.o . . 3 = (+g𝐺)
42, 3mgmcl 18681 . 2 ((𝐺 ∈ Mgm ∧ 𝑋𝐵𝑌𝐵) → (𝑋 𝑌) ∈ 𝐵)
51, 4syl3an1 1163 1 ((𝐺 ∈ Smgrp ∧ 𝑋𝐵𝑌𝐵) → (𝑋 𝑌) ∈ 𝐵)
Colors of variables: wff setvar class
Syntax hints:  wi 4  w3a 1087   = wceq 1537  wcel 2108  cfv 6573  (class class class)co 7448  Basecbs 17258  +gcplusg 17311  Mgmcmgm 18676  Smgrpcsgrp 18756
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1793  ax-4 1807  ax-5 1909  ax-6 1967  ax-7 2007  ax-8 2110  ax-9 2118  ax-ext 2711  ax-nul 5324
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 847  df-3an 1089  df-tru 1540  df-fal 1550  df-ex 1778  df-sb 2065  df-clab 2718  df-cleq 2732  df-clel 2819  df-ne 2947  df-ral 3068  df-rab 3444  df-v 3490  df-sbc 3805  df-dif 3979  df-un 3981  df-ss 3993  df-nul 4353  df-if 4549  df-sn 4649  df-pr 4651  df-op 4655  df-uni 4932  df-br 5167  df-iota 6525  df-fv 6581  df-ov 7451  df-mgm 18678  df-sgrp 18757
This theorem is referenced by:  sgrppropd  18769  prdsplusgsgrpcl  18770  cntzsgrpcl  19374  rngpropd  20201
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