Mathbox for Thierry Arnoux |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > extdgcl | Structured version Visualization version GIF version |
Description: Closure of the field extension degree operation. (Contributed by Thierry Arnoux, 29-Jul-2023.) |
Ref | Expression |
---|---|
extdgcl | ⊢ (𝐸/FldExt𝐹 → (𝐸[:]𝐹) ∈ ℕ0*) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | extdgval 31066 | . 2 ⊢ (𝐸/FldExt𝐹 → (𝐸[:]𝐹) = (dim‘((subringAlg ‘𝐸)‘(Base‘𝐹)))) | |
2 | fldextfld1 31061 | . . . . . 6 ⊢ (𝐸/FldExt𝐹 → 𝐸 ∈ Field) | |
3 | isfld 19504 | . . . . . 6 ⊢ (𝐸 ∈ Field ↔ (𝐸 ∈ DivRing ∧ 𝐸 ∈ CRing)) | |
4 | 2, 3 | sylib 220 | . . . . 5 ⊢ (𝐸/FldExt𝐹 → (𝐸 ∈ DivRing ∧ 𝐸 ∈ CRing)) |
5 | 4 | simpld 497 | . . . 4 ⊢ (𝐸/FldExt𝐹 → 𝐸 ∈ DivRing) |
6 | fldextress 31064 | . . . . 5 ⊢ (𝐸/FldExt𝐹 → 𝐹 = (𝐸 ↾s (Base‘𝐹))) | |
7 | fldextfld2 31062 | . . . . . . 7 ⊢ (𝐸/FldExt𝐹 → 𝐹 ∈ Field) | |
8 | isfld 19504 | . . . . . . 7 ⊢ (𝐹 ∈ Field ↔ (𝐹 ∈ DivRing ∧ 𝐹 ∈ CRing)) | |
9 | 7, 8 | sylib 220 | . . . . . 6 ⊢ (𝐸/FldExt𝐹 → (𝐹 ∈ DivRing ∧ 𝐹 ∈ CRing)) |
10 | 9 | simpld 497 | . . . . 5 ⊢ (𝐸/FldExt𝐹 → 𝐹 ∈ DivRing) |
11 | 6, 10 | eqeltrrd 2913 | . . . 4 ⊢ (𝐸/FldExt𝐹 → (𝐸 ↾s (Base‘𝐹)) ∈ DivRing) |
12 | eqid 2820 | . . . . 5 ⊢ (Base‘𝐹) = (Base‘𝐹) | |
13 | 12 | fldextsubrg 31063 | . . . 4 ⊢ (𝐸/FldExt𝐹 → (Base‘𝐹) ∈ (SubRing‘𝐸)) |
14 | eqid 2820 | . . . . 5 ⊢ ((subringAlg ‘𝐸)‘(Base‘𝐹)) = ((subringAlg ‘𝐸)‘(Base‘𝐹)) | |
15 | eqid 2820 | . . . . 5 ⊢ (𝐸 ↾s (Base‘𝐹)) = (𝐸 ↾s (Base‘𝐹)) | |
16 | 14, 15 | sralvec 31012 | . . . 4 ⊢ ((𝐸 ∈ DivRing ∧ (𝐸 ↾s (Base‘𝐹)) ∈ DivRing ∧ (Base‘𝐹) ∈ (SubRing‘𝐸)) → ((subringAlg ‘𝐸)‘(Base‘𝐹)) ∈ LVec) |
17 | 5, 11, 13, 16 | syl3anc 1366 | . . 3 ⊢ (𝐸/FldExt𝐹 → ((subringAlg ‘𝐸)‘(Base‘𝐹)) ∈ LVec) |
18 | dimcl 31025 | . . 3 ⊢ (((subringAlg ‘𝐸)‘(Base‘𝐹)) ∈ LVec → (dim‘((subringAlg ‘𝐸)‘(Base‘𝐹))) ∈ ℕ0*) | |
19 | 17, 18 | syl 17 | . 2 ⊢ (𝐸/FldExt𝐹 → (dim‘((subringAlg ‘𝐸)‘(Base‘𝐹))) ∈ ℕ0*) |
20 | 1, 19 | eqeltrd 2912 | 1 ⊢ (𝐸/FldExt𝐹 → (𝐸[:]𝐹) ∈ ℕ0*) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 398 ∈ wcel 2113 class class class wbr 5059 ‘cfv 6348 (class class class)co 7149 ℕ0*cxnn0 11961 Basecbs 16476 ↾s cress 16477 CRingccrg 19291 DivRingcdr 19495 Fieldcfield 19496 SubRingcsubrg 19524 LVecclvec 19867 subringAlg csra 19933 dimcldim 31021 /FldExtcfldext 31050 [:]cextdg 31053 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1969 ax-7 2014 ax-8 2115 ax-9 2123 ax-10 2144 ax-11 2160 ax-12 2176 ax-ext 2792 ax-rep 5183 ax-sep 5196 ax-nul 5203 ax-pow 5259 ax-pr 5323 ax-un 7454 ax-reg 9049 ax-inf2 9097 ax-ac2 9878 ax-cnex 10586 ax-resscn 10587 ax-1cn 10588 ax-icn 10589 ax-addcl 10590 ax-addrcl 10591 ax-mulcl 10592 ax-mulrcl 10593 ax-mulcom 10594 ax-addass 10595 ax-mulass 10596 ax-distr 10597 ax-i2m1 10598 ax-1ne0 10599 ax-1rid 10600 ax-rnegex 10601 ax-rrecex 10602 ax-cnre 10603 ax-pre-lttri 10604 ax-pre-lttrn 10605 ax-pre-ltadd 10606 ax-pre-mulgt0 10607 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1083 df-3an 1084 df-tru 1539 df-ex 1780 df-nf 1784 df-sb 2069 df-mo 2621 df-eu 2653 df-clab 2799 df-cleq 2813 df-clel 2892 df-nfc 2962 df-ne 3016 df-nel 3123 df-ral 3142 df-rex 3143 df-reu 3144 df-rmo 3145 df-rab 3146 df-v 3493 df-sbc 3769 df-csb 3877 df-dif 3932 df-un 3934 df-in 3936 df-ss 3945 df-pss 3947 df-nul 4285 df-if 4461 df-pw 4534 df-sn 4561 df-pr 4563 df-tp 4565 df-op 4567 df-uni 4832 df-int 4870 df-iun 4914 df-iin 4915 df-br 5060 df-opab 5122 df-mpt 5140 df-tr 5166 df-id 5453 df-eprel 5458 df-po 5467 df-so 5468 df-fr 5507 df-se 5508 df-we 5509 df-xp 5554 df-rel 5555 df-cnv 5556 df-co 5557 df-dm 5558 df-rn 5559 df-res 5560 df-ima 5561 df-pred 6141 df-ord 6187 df-on 6188 df-lim 6189 df-suc 6190 df-iota 6307 df-fun 6350 df-fn 6351 df-f 6352 df-f1 6353 df-fo 6354 df-f1o 6355 df-fv 6356 df-isom 6357 df-riota 7107 df-ov 7152 df-oprab 7153 df-mpo 7154 df-rpss 7442 df-om 7574 df-1st 7682 df-2nd 7683 df-tpos 7885 df-wrecs 7940 df-recs 8001 df-rdg 8039 df-1o 8095 df-oadd 8099 df-er 8282 df-map 8401 df-en 8503 df-dom 8504 df-sdom 8505 df-fin 8506 df-oi 8967 df-r1 9186 df-rank 9187 df-dju 9323 df-card 9361 df-acn 9364 df-ac 9535 df-pnf 10670 df-mnf 10671 df-xr 10672 df-ltxr 10673 df-le 10674 df-sub 10865 df-neg 10866 df-nn 11632 df-2 11694 df-3 11695 df-4 11696 df-5 11697 df-6 11698 df-7 11699 df-8 11700 df-9 11701 df-n0 11892 df-xnn0 11962 df-z 11976 df-dec 12093 df-uz 12238 df-fz 12890 df-hash 13688 df-struct 16478 df-ndx 16479 df-slot 16480 df-base 16482 df-sets 16483 df-ress 16484 df-plusg 16571 df-mulr 16572 df-sca 16574 df-vsca 16575 df-ip 16576 df-tset 16577 df-ple 16578 df-ocomp 16579 df-0g 16708 df-mre 16850 df-mrc 16851 df-mri 16852 df-acs 16853 df-proset 17531 df-drs 17532 df-poset 17549 df-ipo 17755 df-mgm 17845 df-sgrp 17894 df-mnd 17905 df-submnd 17950 df-grp 18099 df-minusg 18100 df-sbg 18101 df-subg 18269 df-cmn 18901 df-abl 18902 df-mgp 19233 df-ur 19245 df-ring 19292 df-oppr 19366 df-dvdsr 19384 df-unit 19385 df-invr 19415 df-drng 19497 df-field 19498 df-subrg 19526 df-lmod 19629 df-lss 19697 df-lsp 19737 df-lbs 19840 df-lvec 19868 df-sra 19937 df-dim 31022 df-fldext 31054 df-extdg 31055 |
This theorem is referenced by: finexttrb 31074 |
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