Theorem sgrpcl 18660

Description: Closure of the operation of a semigroup. (Contributed by AV, 15-Feb-2025.)

Hypotheses

Ref	Expression
sgrpass.b	⊢ 𝐵 = (Base‘𝐺)
sgrpass.o	⊢ ⚬ = (+g‘𝐺)

Assertion

Ref	Expression
sgrpcl	⊢ ((𝐺 ∈ Smgrp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 ⚬ 𝑌) ∈ 𝐵)

Proof of Theorem sgrpcl

Step	Hyp	Ref	Expression
1		sgrpmgm 18658	. 2 ⊢ (𝐺 ∈ Smgrp → 𝐺 ∈ Mgm)
2		sgrpass.b	. . 3 ⊢ 𝐵 = (Base‘𝐺)
3		sgrpass.o	. . 3 ⊢ ⚬ = (+g‘𝐺)
4	2, 3	mgmcl 18577	. 2 ⊢ ((𝐺 ∈ Mgm ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 ⚬ 𝑌) ∈ 𝐵)
5	1, 4	syl3an1 1163	1 ⊢ ((𝐺 ∈ Smgrp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 ⚬ 𝑌) ∈ 𝐵)

Syntax hints:   → wi 4   ∧ w3a 1086   = wceq 1540   ∈ wcel 2109  ‘cfv 6514  (class class class)co 7390  Basecbs 17186  +_gcplusg 17227  Mgmcmgm 18572  Smgrpcsgrp 18652

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2008  ax-8 2111  ax-9 2119  ax-ext 2702  ax-nul 5264

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-sb 2066  df-clab 2709  df-cleq 2722  df-clel 2804  df-ne 2927  df-ral 3046  df-rab 3409  df-v 3452  df-sbc 3757  df-dif 3920  df-un 3922  df-ss 3934  df-nul 4300  df-if 4492  df-sn 4593  df-pr 4595  df-op 4599  df-uni 4875  df-br 5111  df-iota 6467  df-fv 6522  df-ov 7393  df-mgm 18574  df-sgrp 18653

This theorem is referenced by:  sgrppropd  18665  prdsplusgsgrpcl  18666  cntzsgrpcl  19273  rngpropd  20090