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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 2765 | . . 3 ⊢ (0g‘𝐺) = (0g‘𝐺) | |
| 3 | 1, 2 | grpidcl 19020 | . 2 ⊢ (𝐺 ∈ Grp → (0g‘𝐺) ∈ 𝐵) |
| 4 | 3 | ne0d 4297 | 1 ⊢ (𝐺 ∈ Grp → 𝐵 ≠ ∅) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1563 ∈ wcel 2145 ≠ wne 2960 ∅c0 4288 ‘cfv 6525 Basecbs 17257 0gc0g 17480 Grpcgrp 18988 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1818 ax-4 1832 ax-5 1933 ax-6 1990 ax-7 2031 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2215 ax-ext 2737 ax-sep 5250 ax-nul 5260 ax-pr 5394 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1103 df-tru 1566 df-fal 1576 df-ex 1803 df-nf 1807 df-sb 2094 df-mo 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-ral 3080 df-rex 3090 df-rmo 3370 df-reu 3371 df-rab 3418 df-v 3459 df-sbc 3748 df-dif 3910 df-un 3912 df-in 3914 df-ss 3924 df-nul 4289 df-if 4484 df-sn 4586 df-pr 4588 df-op 4592 df-uni 4868 df-br 5105 df-opab 5167 df-mpt 5186 df-id 5546 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-iota 6481 df-fun 6527 df-fv 6533 df-riota 7357 df-ov 7403 df-0g 17482 df-mgm 18686 df-sgrp 18765 df-mnd 18781 df-grp 18991 |
| This theorem is referenced by: grpn0 19026 dfgrp3 19093 issubg2 19196 grpissubg 19201 qustriv 19240 ghmrn 19287 gexcl3 19645 gexcl2 19647 sylow1lem1 19656 sylow1lem3 19658 sylow1lem5 19660 pgpfi 19663 pgpfi2 19664 sylow2blem3 19680 slwhash 19682 fislw 19683 gexex 19911 lt6abl 19953 ablfac1lem 20128 ablfac1b 20130 ablfac1c 20131 ablfac1eu 20133 pgpfac1lem2 20135 pgpfac1lem3a 20136 ablfaclem3 20147 dvdsr02 20442 0ringnnzr 20597 lmodbn0 20958 lmodsn0 20961 rmodislmodlem 21016 rmodislmod 21017 islss3 21046 rnglidl1 21324 isclmp 25213 dfacbasgrp 43692 |
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