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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 2760 | . . 3 ⊢ (0g‘𝐺) = (0g‘𝐺) | |
| 3 | 1, 2 | grpidcl 19182 | . 2 ⊢ (𝐺 ∈ Grp → (0g‘𝐺) ∈ 𝐵) |
| 4 | 3 | ne0d 4287 | 1 ⊢ (𝐺 ∈ Grp → 𝐵 ≠ ∅) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1569 ∈ wcel 2144 ≠ wne 2955 ∅c0 4278 ‘cfv 6539 Basecbs 17393 0gc0g 17616 Grpcgrp 19150 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-nul 5259 ax-pr 5390 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-ss 3896 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-br 5103 df-opab 5167 df-mpt 5186 df-id 5545 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-iota 6494 df-fun 6541 df-fv 6547 df-riota 7378 df-ov 7424 df-0g 17618 df-mgm 18822 df-sgrp 18914 df-mnd 18930 df-grp 19153 |
| This theorem is used by: grpn0 19188 dfgrp3 19255 issubg2 19358 grpissubg 19363 qustriv 19402 ghmrn 19449 gexcl3 19807 gexcl2 19809 sylow1lem1 19818 sylow1lem3 19820 sylow1lem5 19822 pgpfi 19825 pgpfi2 19826 sylow2blem3 19842 slwhash 19844 fislw 19845 gexex 20073 lt6abl 20115 ablfac1lem 20290 ablfac1b 20292 ablfac1c 20293 ablfac1eu 20295 pgpfac1lem2 20297 pgpfac1lem3a 20298 ablfaclem3 20309 ringbn0 20474 dvdsr02 20608 0ringnnzr 20782 lmodbn0 21152 lmodsn0 21155 rmodislmodlem 21210 rmodislmod 21211 islss3 21240 rnglidl1 21518 isclmp 25424 dfacbasgrp 44204 |
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