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Theorem sgrpcl 18947
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
StepHypRef Expression
1 sgrpmgm 18945 . 2 (𝐺 ∈ Smgrp → 𝐺 ∈ Mgm)
2 sgrpass.b . . 3 𝐵 = (Base‘𝐺)
3 sgrpass.o . . 3 ⚬ = (+g‘𝐺)
42, 3mgmcl 18851 . 2 ((𝐺 ∈ Mgm ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 ⚬ 𝑌) ∈ 𝐵)
51, 4syl3an1 1181 1 ((𝐺 ∈ Smgrp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 ⚬ 𝑌) ∈ 𝐵)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   → wi 4   ∧ w3a 1103   = wceq 1570   ∈ wcel 2147  ‘cfv 6561  (class class class)co 7446  Basecbs 17419  +gcplusg 17460  Mgmcmgm 18846  Smgrpcsgrp 18939
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1945  ax-6 2002  ax-7 2043  ax-8 2149  ax-9 2157  ax-ext 2735  ax-nul 5264
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-sb 2102  df-clab 2742  df-cleq 2755  df-clel 2839  df-ne 2960  df-ral 3081  df-rab 3417  df-v 3456  df-sbc 3743  df-ss 3901  df-dif 4050  df-un 4154  df-nul 4282  df-if 4486  df-sn 4589  df-pr 4591  df-op 4839  df-uni 4871  df-br 5107  df-iota 6515  df-fv 6569  df-ov 7449  df-mgm 18848  df-sgrp 18940
This theorem is used by:  sgrppropd  18952  prdsplusgsgrpcl  18953  cntzsgrpcl  19581  rngpropd  20429
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