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| Mirrors > Home > MPE Home > Th. List > sgrpcl | Structured version Visualization version GIF version | ||
| Description: Closure of the operation of a semigroup. (Contributed by AV, 15-Feb-2025.) |
| Ref | Expression |
|---|---|
| sgrpass.b | ⊢ 𝐵 = (Base‘𝐺) |
| sgrpass.o | ⊢ ⚬ = (+g‘𝐺) |
| Ref | Expression |
|---|---|
| sgrpcl | ⊢ ((𝐺 ∈ Smgrp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 ⚬ 𝑌) ∈ 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | sgrpmgm 18772 | . 2 ⊢ (𝐺 ∈ Smgrp → 𝐺 ∈ Mgm) | |
| 2 | sgrpass.b | . . 3 ⊢ 𝐵 = (Base‘𝐺) | |
| 3 | sgrpass.o | . . 3 ⊢ ⚬ = (+g‘𝐺) | |
| 4 | 2, 3 | mgmcl 18691 | . 2 ⊢ ((𝐺 ∈ Mgm ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 ⚬ 𝑌) ∈ 𝐵) |
| 5 | 1, 4 | syl3an1 1179 | 1 ⊢ ((𝐺 ∈ Smgrp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (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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