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Mirrors > Home > MPE Home > Th. List > grpsgrp | Structured version Visualization version GIF version |
Description: A group is a semigroup. (Contributed by AV, 28-Aug-2021.) |
Ref | Expression |
---|---|
grpsgrp | ⊢ (𝐺 ∈ Grp → 𝐺 ∈ Smgrp) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | grpmnd 18112 | . 2 ⊢ (𝐺 ∈ Grp → 𝐺 ∈ Mnd) | |
2 | mndsgrp 17919 | . 2 ⊢ (𝐺 ∈ Mnd → 𝐺 ∈ Smgrp) | |
3 | 1, 2 | syl 17 | 1 ⊢ (𝐺 ∈ Grp → 𝐺 ∈ Smgrp) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∈ wcel 2114 Smgrpcsgrp 17902 Mndcmnd 17913 Grpcgrp 18105 |
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 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2795 ax-nul 5212 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2802 df-cleq 2816 df-clel 2895 df-nfc 2965 df-ral 3145 df-rex 3146 df-rab 3149 df-v 3498 df-sbc 3775 df-dif 3941 df-un 3943 df-in 3945 df-ss 3954 df-nul 4294 df-if 4470 df-sn 4570 df-pr 4572 df-op 4576 df-uni 4841 df-br 5069 df-iota 6316 df-fv 6365 df-ov 7161 df-mnd 17914 df-grp 18108 |
This theorem is referenced by: dfgrp2 18130 dfgrp3 18200 isarchi3 30818 |
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