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| Mirrors > Home > MPE Home > Th. List > lmodbn0 | Structured version Visualization version GIF version | ||
| Description: The base set of a left module is nonempty. (Contributed by NM, 8-Dec-2013.) (Revised by Mario Carneiro, 19-Jun-2014.) |
| Ref | Expression |
|---|---|
| lmodbn0.b | ⊢ 𝐵 = (Base‘𝑊) |
| Ref | Expression |
|---|---|
| lmodbn0 | ⊢ (𝑊 ∈ LMod → 𝐵 ≠ ∅) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | lmodgrp 21017 | . 2 ⊢ (𝑊 ∈ LMod → 𝑊 ∈ Grp) | |
| 2 | lmodbn0.b | . . 3 ⊢ 𝐵 = (Base‘𝑊) | |
| 3 | 2 | grpbn0 19056 | . 2 ⊢ (𝑊 ∈ Grp → 𝐵 ≠ ∅) |
| 4 | 1, 3 | syl 18 | 1 ⊢ (𝑊 ∈ LMod → 𝐵 ≠ ∅) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2146 ≠ wne 2960 ∅c0 4286 ‘cfv 6540 Basecbs 17286 Grpcgrp 19023 LModclmod 21010 |
| 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 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2737 ax-sep 5259 ax-nul 5271 ax-pr 5406 |
| 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 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-ral 3082 df-rex 3092 df-rmo 3371 df-reu 3372 df-rab 3419 df-v 3459 df-sbc 3747 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-nul 4287 df-if 4490 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4875 df-br 5112 df-opab 5176 df-mpt 5195 df-id 5558 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-iota 6496 df-fun 6542 df-fv 6548 df-riota 7373 df-ov 7419 df-0g 17511 df-mgm 18715 df-sgrp 18798 df-mnd 18814 df-grp 19026 df-lmod 21012 |
| This theorem is used by: lmodfopnelem1 21048 lss1 21088 lmod0rng 49027 |
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