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Mirrors > Home > MPE Home > Th. List > Mathboxes > dimvalfi | Structured version Visualization version GIF version |
Description: The dimension of a vector space 𝐹 is the cardinality of one of its bases. This version of dimval 31686 does not depend on the axiom of choice, but it is limited to the case where the base 𝑆 is finite. (Contributed by Thierry Arnoux, 24-May-2023.) |
Ref | Expression |
---|---|
dimval.1 | ⊢ 𝐽 = (LBasis‘𝐹) |
Ref | Expression |
---|---|
dimvalfi | ⊢ ((𝐹 ∈ LVec ∧ 𝑆 ∈ 𝐽 ∧ 𝑆 ∈ Fin) → (dim‘𝐹) = (♯‘𝑆)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | elex 3450 | . . . 4 ⊢ (𝐹 ∈ LVec → 𝐹 ∈ V) | |
2 | fveq2 6774 | . . . . . . . 8 ⊢ (𝑓 = 𝐹 → (LBasis‘𝑓) = (LBasis‘𝐹)) | |
3 | dimval.1 | . . . . . . . 8 ⊢ 𝐽 = (LBasis‘𝐹) | |
4 | 2, 3 | eqtr4di 2796 | . . . . . . 7 ⊢ (𝑓 = 𝐹 → (LBasis‘𝑓) = 𝐽) |
5 | 4 | imaeq2d 5969 | . . . . . 6 ⊢ (𝑓 = 𝐹 → (♯ “ (LBasis‘𝑓)) = (♯ “ 𝐽)) |
6 | 5 | unieqd 4853 | . . . . 5 ⊢ (𝑓 = 𝐹 → ∪ (♯ “ (LBasis‘𝑓)) = ∪ (♯ “ 𝐽)) |
7 | df-dim 31685 | . . . . 5 ⊢ dim = (𝑓 ∈ V ↦ ∪ (♯ “ (LBasis‘𝑓))) | |
8 | hashf 14052 | . . . . . . 7 ⊢ ♯:V⟶(ℕ0 ∪ {+∞}) | |
9 | ffun 6603 | . . . . . . 7 ⊢ (♯:V⟶(ℕ0 ∪ {+∞}) → Fun ♯) | |
10 | 3 | fvexi 6788 | . . . . . . . 8 ⊢ 𝐽 ∈ V |
11 | 10 | funimaex 6521 | . . . . . . 7 ⊢ (Fun ♯ → (♯ “ 𝐽) ∈ V) |
12 | 8, 9, 11 | mp2b 10 | . . . . . 6 ⊢ (♯ “ 𝐽) ∈ V |
13 | 12 | uniex 7594 | . . . . 5 ⊢ ∪ (♯ “ 𝐽) ∈ V |
14 | 6, 7, 13 | fvmpt 6875 | . . . 4 ⊢ (𝐹 ∈ V → (dim‘𝐹) = ∪ (♯ “ 𝐽)) |
15 | 1, 14 | syl 17 | . . 3 ⊢ (𝐹 ∈ LVec → (dim‘𝐹) = ∪ (♯ “ 𝐽)) |
16 | 15 | 3ad2ant1 1132 | . 2 ⊢ ((𝐹 ∈ LVec ∧ 𝑆 ∈ 𝐽 ∧ 𝑆 ∈ Fin) → (dim‘𝐹) = ∪ (♯ “ 𝐽)) |
17 | simpll1 1211 | . . . . . . . . . 10 ⊢ ((((𝐹 ∈ LVec ∧ 𝑆 ∈ 𝐽 ∧ 𝑆 ∈ Fin) ∧ 𝑥 ∈ (♯ “ 𝐽)) ∧ 𝑡 ∈ 𝐽) → 𝐹 ∈ LVec) | |
18 | simpll2 1212 | . . . . . . . . . 10 ⊢ ((((𝐹 ∈ LVec ∧ 𝑆 ∈ 𝐽 ∧ 𝑆 ∈ Fin) ∧ 𝑥 ∈ (♯ “ 𝐽)) ∧ 𝑡 ∈ 𝐽) → 𝑆 ∈ 𝐽) | |
19 | simpr 485 | . . . . . . . . . 10 ⊢ ((((𝐹 ∈ LVec ∧ 𝑆 ∈ 𝐽 ∧ 𝑆 ∈ Fin) ∧ 𝑥 ∈ (♯ “ 𝐽)) ∧ 𝑡 ∈ 𝐽) → 𝑡 ∈ 𝐽) | |
20 | simpll3 1213 | . . . . . . . . . 10 ⊢ ((((𝐹 ∈ LVec ∧ 𝑆 ∈ 𝐽 ∧ 𝑆 ∈ Fin) ∧ 𝑥 ∈ (♯ “ 𝐽)) ∧ 𝑡 ∈ 𝐽) → 𝑆 ∈ Fin) | |
21 | 3, 17, 18, 19, 20 | lvecdimfi 31683 | . . . . . . . . 9 ⊢ ((((𝐹 ∈ LVec ∧ 𝑆 ∈ 𝐽 ∧ 𝑆 ∈ Fin) ∧ 𝑥 ∈ (♯ “ 𝐽)) ∧ 𝑡 ∈ 𝐽) → 𝑆 ≈ 𝑡) |
22 | hasheni 14062 | . . . . . . . . 9 ⊢ (𝑆 ≈ 𝑡 → (♯‘𝑆) = (♯‘𝑡)) | |
23 | 21, 22 | syl 17 | . . . . . . . 8 ⊢ ((((𝐹 ∈ LVec ∧ 𝑆 ∈ 𝐽 ∧ 𝑆 ∈ Fin) ∧ 𝑥 ∈ (♯ “ 𝐽)) ∧ 𝑡 ∈ 𝐽) → (♯‘𝑆) = (♯‘𝑡)) |
24 | 23 | adantr 481 | . . . . . . 7 ⊢ (((((𝐹 ∈ LVec ∧ 𝑆 ∈ 𝐽 ∧ 𝑆 ∈ Fin) ∧ 𝑥 ∈ (♯ “ 𝐽)) ∧ 𝑡 ∈ 𝐽) ∧ (♯‘𝑡) = 𝑥) → (♯‘𝑆) = (♯‘𝑡)) |
25 | simpr 485 | . . . . . . 7 ⊢ (((((𝐹 ∈ LVec ∧ 𝑆 ∈ 𝐽 ∧ 𝑆 ∈ Fin) ∧ 𝑥 ∈ (♯ “ 𝐽)) ∧ 𝑡 ∈ 𝐽) ∧ (♯‘𝑡) = 𝑥) → (♯‘𝑡) = 𝑥) | |
26 | 24, 25 | eqtr2d 2779 | . . . . . 6 ⊢ (((((𝐹 ∈ LVec ∧ 𝑆 ∈ 𝐽 ∧ 𝑆 ∈ Fin) ∧ 𝑥 ∈ (♯ “ 𝐽)) ∧ 𝑡 ∈ 𝐽) ∧ (♯‘𝑡) = 𝑥) → 𝑥 = (♯‘𝑆)) |
27 | 8, 9 | ax-mp 5 | . . . . . . . 8 ⊢ Fun ♯ |
28 | fvelima 6835 | . . . . . . . 8 ⊢ ((Fun ♯ ∧ 𝑥 ∈ (♯ “ 𝐽)) → ∃𝑡 ∈ 𝐽 (♯‘𝑡) = 𝑥) | |
29 | 27, 28 | mpan 687 | . . . . . . 7 ⊢ (𝑥 ∈ (♯ “ 𝐽) → ∃𝑡 ∈ 𝐽 (♯‘𝑡) = 𝑥) |
30 | 29 | adantl 482 | . . . . . 6 ⊢ (((𝐹 ∈ LVec ∧ 𝑆 ∈ 𝐽 ∧ 𝑆 ∈ Fin) ∧ 𝑥 ∈ (♯ “ 𝐽)) → ∃𝑡 ∈ 𝐽 (♯‘𝑡) = 𝑥) |
31 | 26, 30 | r19.29a 3218 | . . . . 5 ⊢ (((𝐹 ∈ LVec ∧ 𝑆 ∈ 𝐽 ∧ 𝑆 ∈ Fin) ∧ 𝑥 ∈ (♯ “ 𝐽)) → 𝑥 = (♯‘𝑆)) |
32 | 31 | ralrimiva 3103 | . . . 4 ⊢ ((𝐹 ∈ LVec ∧ 𝑆 ∈ 𝐽 ∧ 𝑆 ∈ Fin) → ∀𝑥 ∈ (♯ “ 𝐽)𝑥 = (♯‘𝑆)) |
33 | ne0i 4268 | . . . . . . 7 ⊢ (𝑆 ∈ 𝐽 → 𝐽 ≠ ∅) | |
34 | 33 | 3ad2ant2 1133 | . . . . . 6 ⊢ ((𝐹 ∈ LVec ∧ 𝑆 ∈ 𝐽 ∧ 𝑆 ∈ Fin) → 𝐽 ≠ ∅) |
35 | ffn 6600 | . . . . . . . . 9 ⊢ (♯:V⟶(ℕ0 ∪ {+∞}) → ♯ Fn V) | |
36 | 8, 35 | ax-mp 5 | . . . . . . . 8 ⊢ ♯ Fn V |
37 | ssv 3945 | . . . . . . . 8 ⊢ 𝐽 ⊆ V | |
38 | fnimaeq0 6566 | . . . . . . . 8 ⊢ ((♯ Fn V ∧ 𝐽 ⊆ V) → ((♯ “ 𝐽) = ∅ ↔ 𝐽 = ∅)) | |
39 | 36, 37, 38 | mp2an 689 | . . . . . . 7 ⊢ ((♯ “ 𝐽) = ∅ ↔ 𝐽 = ∅) |
40 | 39 | necon3bii 2996 | . . . . . 6 ⊢ ((♯ “ 𝐽) ≠ ∅ ↔ 𝐽 ≠ ∅) |
41 | 34, 40 | sylibr 233 | . . . . 5 ⊢ ((𝐹 ∈ LVec ∧ 𝑆 ∈ 𝐽 ∧ 𝑆 ∈ Fin) → (♯ “ 𝐽) ≠ ∅) |
42 | eqsn 4762 | . . . . 5 ⊢ ((♯ “ 𝐽) ≠ ∅ → ((♯ “ 𝐽) = {(♯‘𝑆)} ↔ ∀𝑥 ∈ (♯ “ 𝐽)𝑥 = (♯‘𝑆))) | |
43 | 41, 42 | syl 17 | . . . 4 ⊢ ((𝐹 ∈ LVec ∧ 𝑆 ∈ 𝐽 ∧ 𝑆 ∈ Fin) → ((♯ “ 𝐽) = {(♯‘𝑆)} ↔ ∀𝑥 ∈ (♯ “ 𝐽)𝑥 = (♯‘𝑆))) |
44 | 32, 43 | mpbird 256 | . . 3 ⊢ ((𝐹 ∈ LVec ∧ 𝑆 ∈ 𝐽 ∧ 𝑆 ∈ Fin) → (♯ “ 𝐽) = {(♯‘𝑆)}) |
45 | 44 | unieqd 4853 | . 2 ⊢ ((𝐹 ∈ LVec ∧ 𝑆 ∈ 𝐽 ∧ 𝑆 ∈ Fin) → ∪ (♯ “ 𝐽) = ∪ {(♯‘𝑆)}) |
46 | fvex 6787 | . . . 4 ⊢ (♯‘𝑆) ∈ V | |
47 | 46 | unisn 4861 | . . 3 ⊢ ∪ {(♯‘𝑆)} = (♯‘𝑆) |
48 | 47 | a1i 11 | . 2 ⊢ ((𝐹 ∈ LVec ∧ 𝑆 ∈ 𝐽 ∧ 𝑆 ∈ Fin) → ∪ {(♯‘𝑆)} = (♯‘𝑆)) |
49 | 16, 45, 48 | 3eqtrd 2782 | 1 ⊢ ((𝐹 ∈ LVec ∧ 𝑆 ∈ 𝐽 ∧ 𝑆 ∈ Fin) → (dim‘𝐹) = (♯‘𝑆)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 396 ∧ w3a 1086 = wceq 1539 ∈ wcel 2106 ≠ wne 2943 ∀wral 3064 ∃wrex 3065 Vcvv 3432 ∪ cun 3885 ⊆ wss 3887 ∅c0 4256 {csn 4561 ∪ cuni 4839 class class class wbr 5074 “ cima 5592 Fun wfun 6427 Fn wfn 6428 ⟶wf 6429 ‘cfv 6433 ≈ cen 8730 Fincfn 8733 +∞cpnf 11006 ℕ0cn0 12233 ♯chash 14044 LBasisclbs 20336 LVecclvec 20364 dimcldim 31684 |
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-iin 4927 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-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-riota 7232 df-ov 7278 df-oprab 7279 df-mpo 7280 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-er 8498 df-en 8734 df-dom 8735 df-sdom 8736 df-fin 8737 df-card 9697 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-n0 12234 df-xnn0 12306 df-z 12320 df-uz 12583 df-hash 14045 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-mre 17295 df-mrc 17296 df-mri 17297 df-acs 17298 df-mgm 18326 df-sgrp 18375 df-mnd 18386 df-submnd 18431 df-grp 18580 df-minusg 18581 df-sbg 18582 df-subg 18752 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 df-dim 31685 |
This theorem is referenced by: (None) |
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