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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 2761 | . . 3 ⊢ (0g‘𝐺) = (0g‘𝐺) | |
| 3 | 1, 2 | grpidcl 19169 | . 2 ⊢ (𝐺 ∈ Grp → (0g‘𝐺) ∈ 𝐵) |
| 4 | 3 | ne0d 4288 | 1 ⊢ (𝐺 ∈ Grp → 𝐵 ≠ ∅) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2145 ≠ wne 2956 ∅c0 4279 ‘cfv 6537 Basecbs 17380 0gc0g 17603 Grpcgrp 19137 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-sep 5249 ax-nul 5260 ax-pr 5391 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-ral 3078 df-rex 3088 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3453 df-sbc 3740 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-opab 5168 df-mpt 5187 df-id 5546 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-iota 6493 df-fun 6539 df-fv 6545 df-riota 7375 df-ov 7421 df-0g 17605 df-mgm 18809 df-sgrp 18901 df-mnd 18917 df-grp 19140 |
| This theorem is used by: grpn0 19175 dfgrp3 19242 issubg2 19345 grpissubg 19350 qustriv 19389 ghmrn 19436 gexcl3 19794 gexcl2 19796 sylow1lem1 19805 sylow1lem3 19807 sylow1lem5 19809 pgpfi 19812 pgpfi2 19813 sylow2blem3 19829 slwhash 19831 fislw 19832 gexex 20060 lt6abl 20102 ablfac1lem 20277 ablfac1b 20279 ablfac1c 20280 ablfac1eu 20282 pgpfac1lem2 20284 pgpfac1lem3a 20285 ablfaclem3 20296 ringbn0 20461 dvdsr02 20595 0ringnnzr 20769 lmodbn0 21139 lmodsn0 21142 rmodislmodlem 21197 rmodislmod 21198 islss3 21227 rnglidl1 21505 isclmp 25411 dfacbasgrp 44094 |
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