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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 18649 | . 2 ⊢ (𝐺 ∈ Smgrp → 𝐺 ∈ Mgm) | |
| 2 | sgrpass.b | . . 3 ⊢ 𝐵 = (Base‘𝐺) | |
| 3 | sgrpass.o | . . 3 ⊢ ⚬ = (+g‘𝐺) | |
| 4 | 2, 3 | mgmcl 18568 | . 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) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ w3a 1086 = wceq 1541 ∈ wcel 2113 ‘cfv 6492 (class class class)co 7358 Basecbs 17136 +gcplusg 17177 Mgmcmgm 18563 Smgrpcsgrp 18643 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-ext 2708 ax-nul 5251 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-sb 2068 df-clab 2715 df-cleq 2728 df-clel 2811 df-ne 2933 df-ral 3052 df-rab 3400 df-v 3442 df-sbc 3741 df-dif 3904 df-un 3906 df-ss 3918 df-nul 4286 df-if 4480 df-sn 4581 df-pr 4583 df-op 4587 df-uni 4864 df-br 5099 df-iota 6448 df-fv 6500 df-ov 7361 df-mgm 18565 df-sgrp 18644 |
| This theorem is referenced by: sgrppropd 18656 prdsplusgsgrpcl 18657 cntzsgrpcl 19263 rngpropd 20109 |
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