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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 2736 | . . 3 ⊢ (0g‘𝐺) = (0g‘𝐺) | |
| 3 | 1, 2 | grpidcl 18941 | . 2 ⊢ (𝐺 ∈ Grp → (0g‘𝐺) ∈ 𝐵) |
| 4 | 3 | ne0d 4282 | 1 ⊢ (𝐺 ∈ Grp → 𝐵 ≠ ∅) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1542 ∈ wcel 2114 ≠ wne 2932 ∅c0 4273 ‘cfv 6498 Basecbs 17179 0gc0g 17402 Grpcgrp 18909 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2708 ax-sep 5231 ax-nul 5241 ax-pr 5375 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-ral 3052 df-rex 3062 df-rmo 3342 df-reu 3343 df-rab 3390 df-v 3431 df-sbc 3729 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-nul 4274 df-if 4467 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4851 df-br 5086 df-opab 5148 df-mpt 5167 df-id 5526 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-iota 6454 df-fun 6500 df-fv 6506 df-riota 7324 df-ov 7370 df-0g 17404 df-mgm 18608 df-sgrp 18687 df-mnd 18703 df-grp 18912 |
| This theorem is referenced by: grpn0 18947 dfgrp3 19015 issubg2 19117 grpissubg 19122 ghmrn 19204 gexcl3 19562 gexcl2 19564 sylow1lem1 19573 sylow1lem3 19575 sylow1lem5 19577 pgpfi 19580 pgpfi2 19581 sylow2blem3 19597 slwhash 19599 fislw 19600 gexex 19828 lt6abl 19870 ablfac1lem 20045 ablfac1b 20047 ablfac1c 20048 ablfac1eu 20050 pgpfac1lem2 20052 pgpfac1lem3a 20053 ablfaclem3 20064 dvdsr02 20352 0ringnnzr 20502 lmodbn0 20866 lmodsn0 20869 rmodislmodlem 20924 rmodislmod 20925 islss3 20954 rnglidl1 21230 isclmp 25064 qustriv 33424 dfacbasgrp 43536 |
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