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Mirrors > Home > MPE Home > Th. List > lbsexg | Structured version Visualization version GIF version |
Description: Every vector space has a basis. This theorem is an AC equivalent; this is the forward implication. (Contributed by Mario Carneiro, 17-May-2015.) |
Ref | Expression |
---|---|
lbsex.j | ⊢ 𝐽 = (LBasis‘𝑊) |
Ref | Expression |
---|---|
lbsexg | ⊢ ((CHOICE ∧ 𝑊 ∈ LVec) → 𝐽 ≠ ∅) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | id 22 | . . 3 ⊢ (𝑊 ∈ LVec → 𝑊 ∈ LVec) | |
2 | fvex 6787 | . . . . 5 ⊢ (Base‘𝑊) ∈ V | |
3 | 2 | pwex 5303 | . . . 4 ⊢ 𝒫 (Base‘𝑊) ∈ V |
4 | dfac10 9893 | . . . . 5 ⊢ (CHOICE ↔ dom card = V) | |
5 | 4 | biimpi 215 | . . . 4 ⊢ (CHOICE → dom card = V) |
6 | 3, 5 | eleqtrrid 2846 | . . 3 ⊢ (CHOICE → 𝒫 (Base‘𝑊) ∈ dom card) |
7 | 0ss 4330 | . . . 4 ⊢ ∅ ⊆ (Base‘𝑊) | |
8 | ral0 4443 | . . . 4 ⊢ ∀𝑥 ∈ ∅ ¬ 𝑥 ∈ ((LSpan‘𝑊)‘(∅ ∖ {𝑥})) | |
9 | lbsex.j | . . . . 5 ⊢ 𝐽 = (LBasis‘𝑊) | |
10 | eqid 2738 | . . . . 5 ⊢ (Base‘𝑊) = (Base‘𝑊) | |
11 | eqid 2738 | . . . . 5 ⊢ (LSpan‘𝑊) = (LSpan‘𝑊) | |
12 | 9, 10, 11 | lbsextg 20424 | . . . 4 ⊢ (((𝑊 ∈ LVec ∧ 𝒫 (Base‘𝑊) ∈ dom card) ∧ ∅ ⊆ (Base‘𝑊) ∧ ∀𝑥 ∈ ∅ ¬ 𝑥 ∈ ((LSpan‘𝑊)‘(∅ ∖ {𝑥}))) → ∃𝑠 ∈ 𝐽 ∅ ⊆ 𝑠) |
13 | 7, 8, 12 | mp3an23 1452 | . . 3 ⊢ ((𝑊 ∈ LVec ∧ 𝒫 (Base‘𝑊) ∈ dom card) → ∃𝑠 ∈ 𝐽 ∅ ⊆ 𝑠) |
14 | 1, 6, 13 | syl2anr 597 | . 2 ⊢ ((CHOICE ∧ 𝑊 ∈ LVec) → ∃𝑠 ∈ 𝐽 ∅ ⊆ 𝑠) |
15 | rexn0 4441 | . 2 ⊢ (∃𝑠 ∈ 𝐽 ∅ ⊆ 𝑠 → 𝐽 ≠ ∅) | |
16 | 14, 15 | syl 17 | 1 ⊢ ((CHOICE ∧ 𝑊 ∈ LVec) → 𝐽 ≠ ∅) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 396 = wceq 1539 ∈ wcel 2106 ≠ wne 2943 ∀wral 3064 ∃wrex 3065 Vcvv 3432 ∖ cdif 3884 ⊆ wss 3887 ∅c0 4256 𝒫 cpw 4533 {csn 4561 dom cdm 5589 ‘cfv 6433 cardccrd 9693 CHOICEwac 9871 Basecbs 16912 LSpanclspn 20233 LBasisclbs 20336 LVecclvec 20364 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-rep 5209 ax-sep 5223 ax-nul 5230 ax-pow 5288 ax-pr 5352 ax-un 7588 ax-cnex 10927 ax-resscn 10928 ax-1cn 10929 ax-icn 10930 ax-addcl 10931 ax-addrcl 10932 ax-mulcl 10933 ax-mulrcl 10934 ax-mulcom 10935 ax-addass 10936 ax-mulass 10937 ax-distr 10938 ax-i2m1 10939 ax-1ne0 10940 ax-1rid 10941 ax-rnegex 10942 ax-rrecex 10943 ax-cnre 10944 ax-pre-lttri 10945 ax-pre-lttrn 10946 ax-pre-ltadd 10947 ax-pre-mulgt0 10948 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-nel 3050 df-ral 3069 df-rex 3070 df-rmo 3071 df-reu 3072 df-rab 3073 df-v 3434 df-sbc 3717 df-csb 3833 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-pss 3906 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-int 4880 df-iun 4926 df-br 5075 df-opab 5137 df-mpt 5158 df-tr 5192 df-id 5489 df-eprel 5495 df-po 5503 df-so 5504 df-fr 5544 df-se 5545 df-we 5546 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-pred 6202 df-ord 6269 df-on 6270 df-lim 6271 df-suc 6272 df-iota 6391 df-fun 6435 df-fn 6436 df-f 6437 df-f1 6438 df-fo 6439 df-f1o 6440 df-fv 6441 df-isom 6442 df-riota 7232 df-ov 7278 df-oprab 7279 df-mpo 7280 df-rpss 7576 df-om 7713 df-1st 7831 df-2nd 7832 df-tpos 8042 df-frecs 8097 df-wrecs 8128 df-recs 8202 df-rdg 8241 df-1o 8297 df-oadd 8301 df-er 8498 df-en 8734 df-dom 8735 df-sdom 8736 df-fin 8737 df-dju 9659 df-card 9697 df-ac 9872 df-pnf 11011 df-mnf 11012 df-xr 11013 df-ltxr 11014 df-le 11015 df-sub 11207 df-neg 11208 df-nn 11974 df-2 12036 df-3 12037 df-sets 16865 df-slot 16883 df-ndx 16895 df-base 16913 df-ress 16942 df-plusg 16975 df-mulr 16976 df-0g 17152 df-mgm 18326 df-sgrp 18375 df-mnd 18386 df-grp 18580 df-minusg 18581 df-sbg 18582 df-cmn 19388 df-abl 19389 df-mgp 19721 df-ur 19738 df-ring 19785 df-oppr 19862 df-dvdsr 19883 df-unit 19884 df-invr 19914 df-drng 19993 df-lmod 20125 df-lss 20194 df-lsp 20234 df-lbs 20337 df-lvec 20365 |
This theorem is referenced by: lbsex 20427 |
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