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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 2821 | . . 3 ⊢ (0g‘𝐺) = (0g‘𝐺) | |
3 | 1, 2 | grpidcl 18125 | . 2 ⊢ (𝐺 ∈ Grp → (0g‘𝐺) ∈ 𝐵) |
4 | 3 | ne0d 4301 | 1 ⊢ (𝐺 ∈ Grp → 𝐵 ≠ ∅) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1533 ∈ wcel 2110 ≠ wne 3016 ∅c0 4291 ‘cfv 6350 Basecbs 16477 0gc0g 16707 Grpcgrp 18097 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1907 ax-6 1966 ax-7 2011 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2156 ax-12 2172 ax-ext 2793 ax-sep 5196 ax-nul 5203 ax-pow 5259 ax-pr 5322 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1536 df-ex 1777 df-nf 1781 df-sb 2066 df-mo 2618 df-eu 2650 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ne 3017 df-ral 3143 df-rex 3144 df-reu 3145 df-rmo 3146 df-rab 3147 df-v 3497 df-sbc 3773 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-nul 4292 df-if 4468 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4833 df-br 5060 df-opab 5122 df-mpt 5140 df-id 5455 df-xp 5556 df-rel 5557 df-cnv 5558 df-co 5559 df-dm 5560 df-iota 6309 df-fun 6352 df-fv 6358 df-riota 7108 df-ov 7153 df-0g 16709 df-mgm 17846 df-sgrp 17895 df-mnd 17906 df-grp 18100 |
This theorem is referenced by: grpn0 18129 dfgrp3 18192 issubg2 18288 grpissubg 18293 ghmrn 18365 gexcl3 18706 gexcl2 18708 sylow1lem1 18717 sylow1lem3 18719 sylow1lem5 18721 pgpfi 18724 pgpfi2 18725 sylow2blem3 18741 slwhash 18743 fislw 18744 gexex 18967 lt6abl 19009 ablfac1lem 19184 ablfac1b 19186 ablfac1c 19187 ablfac1eu 19189 pgpfac1lem2 19191 pgpfac1lem3a 19192 ablfaclem3 19203 dvdsr02 19400 lmodbn0 19638 lmodsn0 19641 rmodislmodlem 19695 rmodislmod 19696 islss3 19725 0ringnnzr 20036 isclmp 23695 qustriv 30924 dfacbasgrp 39701 |
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