Theorem sgrpcl 18785

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 18783	. 2 ⊢ (𝐺 ∈ Smgrp → 𝐺 ∈ Mgm)
2		sgrpass.b	. . 3 ⊢ 𝐵 = (Base‘𝐺)
3		sgrpass.o	. . 3 ⊢ ⚬ = (+g‘𝐺)
4	2, 3	mgmcl 18702	. 2 ⊢ ((𝐺 ∈ Mgm ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 ⚬ 𝑌) ∈ 𝐵)
5	1, 4	syl3an1 1181	1 ⊢ ((𝐺 ∈ Smgrp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 ⚬ 𝑌) ∈ 𝐵)

Syntax hints:   → wi 4   ∧ w3a 1103   = wceq 1570   ∈ wcel 2143  ‘cfv 6538  (class class class)co 7412  Basecbs 17270  +_gcplusg 17311  Mgmcmgm 18697  Smgrpcsgrp 18777

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1825  ax-4 1839  ax-5 1940  ax-6 1997  ax-7 2038  ax-8 2145  ax-9 2153  ax-ext 2735  ax-nul 5270

This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1810  df-sb 2097  df-clab 2742  df-cleq 2755  df-clel 2838  df-ne 2959  df-ral 3080  df-rab 3417  df-v 3457  df-sbc 3746  df-dif 3909  df-un 3911  df-ss 3923  df-nul 4288  df-if 4489  df-sn 4591  df-pr 4593  df-op 4597  df-uni 4874  df-br 5111  df-iota 6494  df-fv 6546  df-ov 7415  df-mgm 18699  df-sgrp 18778

This theorem is referenced by:  sgrppropd  18790  prdsplusgsgrpcl  18791  cntzsgrpcl  19405  rngpropd  20253