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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 2741 | . . 3 ⊢ (0g‘𝐺) = (0g‘𝐺) | |
| 3 | 1, 2 | grpidcl 18936 | . 2 ⊢ (𝐺 ∈ Grp → (0g‘𝐺) ∈ 𝐵) |
| 4 | 3 | ne0d 4272 | 1 ⊢ (𝐺 ∈ Grp → 𝐵 ≠ ∅) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1548 ∈ wcel 2121 ≠ wne 2936 ∅c0 4263 ‘cfv 6488 Basecbs 17174 0gc0g 17397 Grpcgrp 18904 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1975 ax-7 2016 ax-8 2123 ax-9 2131 ax-10 2154 ax-11 2170 ax-12 2191 ax-ext 2713 ax-sep 5220 ax-nul 5230 ax-pr 5364 |
| This theorem depends on definitions: df-bi 209 df-an 398 df-or 855 df-3an 1095 df-tru 1551 df-fal 1561 df-ex 1788 df-nf 1792 df-sb 2075 df-mo 2545 df-eu 2575 df-clab 2720 df-cleq 2733 df-clel 2816 df-nfc 2890 df-ne 2937 df-ral 3056 df-rex 3066 df-rmo 3346 df-reu 3347 df-rab 3394 df-v 3435 df-sbc 3725 df-dif 3887 df-un 3889 df-in 3891 df-ss 3901 df-nul 4264 df-if 4457 df-sn 4558 df-pr 4560 df-op 4564 df-uni 4841 df-br 5075 df-opab 5137 df-mpt 5156 df-id 5515 df-xp 5626 df-rel 5627 df-cnv 5628 df-co 5629 df-dm 5630 df-iota 6444 df-fun 6490 df-fv 6496 df-riota 7316 df-ov 7362 df-0g 17399 df-mgm 18603 df-sgrp 18682 df-mnd 18698 df-grp 18907 |
| This theorem is referenced by: grpn0 18942 dfgrp3 19010 issubg2 19112 grpissubg 19117 ghmrn 19198 gexcl3 19556 gexcl2 19558 sylow1lem1 19567 sylow1lem3 19569 sylow1lem5 19571 pgpfi 19574 pgpfi2 19575 sylow2blem3 19591 slwhash 19593 fislw 19594 gexex 19822 lt6abl 19864 ablfac1lem 20039 ablfac1b 20041 ablfac1c 20042 ablfac1eu 20044 pgpfac1lem2 20046 pgpfac1lem3a 20047 ablfaclem3 20058 dvdsr02 20346 0ringnnzr 20500 lmodbn0 20864 lmodsn0 20867 rmodislmodlem 20922 rmodislmod 20923 islss3 20952 rnglidl1 21228 isclmp 25085 qustriv 33449 dfacbasgrp 43566 |
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