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| Mirrors > Home > MPE Home > Th. List > grpbn0 | Structured version Visualization version GIF version | ||
| Description: The base set of a group is not empty. (Contributed by Szymon Jaroszewicz, 3-Apr-2007.) |
| Ref | Expression |
|---|---|
| grpbn0.b | ⊢ 𝐵 = (Base‘𝐺) |
| Ref | Expression |
|---|---|
| grpbn0 | ⊢ (𝐺 ∈ Grp → 𝐵 ≠ ∅) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | grpbn0.b | . . 3 ⊢ 𝐵 = (Base‘𝐺) | |
| 2 | eqid 2761 | . . 3 ⊢ (0g‘𝐺) = (0g‘𝐺) | |
| 3 | 1, 2 | grpidcl 18997 | . 2 ⊢ (𝐺 ∈ Grp → (0g‘𝐺) ∈ 𝐵) |
| 4 | 3 | ne0d 4292 | 1 ⊢ (𝐺 ∈ Grp → 𝐵 ≠ ∅) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1559 ∈ wcel 2141 ≠ wne 2956 ∅c0 4283 ‘cfv 6515 Basecbs 17235 0gc0g 17458 Grpcgrp 18965 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-10 2174 ax-11 2190 ax-12 2211 ax-ext 2733 ax-sep 5243 ax-nul 5253 ax-pr 5387 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-nf 1803 df-sb 2090 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-ral 3076 df-rex 3086 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3455 df-sbc 3743 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4284 df-if 4478 df-sn 4580 df-pr 4582 df-op 4586 df-uni 4863 df-br 5098 df-opab 5160 df-mpt 5179 df-id 5538 df-xp 5649 df-rel 5650 df-cnv 5651 df-co 5652 df-dm 5653 df-iota 6471 df-fun 6517 df-fv 6523 df-riota 7347 df-ov 7393 df-0g 17460 df-mgm 18664 df-sgrp 18743 df-mnd 18759 df-grp 18968 |
| This theorem is referenced by: grpn0 19003 dfgrp3 19071 issubg2 19173 grpissubg 19178 ghmrn 19259 gexcl3 19617 gexcl2 19619 sylow1lem1 19628 sylow1lem3 19630 sylow1lem5 19632 pgpfi 19635 pgpfi2 19636 sylow2blem3 19652 slwhash 19654 fislw 19655 gexex 19883 lt6abl 19925 ablfac1lem 20100 ablfac1b 20102 ablfac1c 20103 ablfac1eu 20105 pgpfac1lem2 20107 pgpfac1lem3a 20108 ablfaclem3 20119 dvdsr02 20407 0ringnnzr 20561 lmodbn0 20925 lmodsn0 20928 rmodislmodlem 20983 rmodislmod 20984 islss3 21013 rnglidl1 21289 isclmp 25146 qustriv 33510 dfacbasgrp 43645 |
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