dochfln0 - Mathbox for Norm Megill

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Theorem dochfln0 41976

Description: The value of a functional is nonzero at a nonzero vector in the orthocomplement of its kernel. (Contributed by NM, 2-Jan-2015.)

**Hypotheses**
Ref	Expression
dochfln0.h	⊢ 𝐻 = (LHyp‘𝐾)
dochfln0.o	⊢ ⊥ = ((ocH‘𝐾)‘𝑊)
dochfln0.u	⊢ 𝑈 = ((DVecH‘𝐾)‘𝑊)
dochfln0.v	⊢ 𝑉 = (Base‘𝑈)
dochfln0.r	⊢ 𝑅 = (Scalar‘𝑈)
dochfln0.n	⊢ 𝑁 = (0_g‘𝑅)
dochfln0.z	⊢ 0 = (0_g‘𝑈)
dochfln0.f	⊢ 𝐹 = (LFnl‘𝑈)
dochfln0.l	⊢ 𝐿 = (LKer‘𝑈)
dochfln0.k	⊢ (𝜑 → (𝐾 ∈ HL ∧ 𝑊 ∈ 𝐻))
dochfln0.g	⊢ (𝜑 → 𝐺 ∈ 𝐹)
dochfln0.x	⊢ (𝜑 → 𝑋 ∈ (( ⊥ ‘(𝐿‘𝐺)) ∖ { 0 }))

**Assertion**
Ref	Expression
dochfln0	⊢ (𝜑 → (𝐺‘𝑋) ≠ 𝑁)

**Proof of Theorem dochfln0**
Step	Hyp	Ref	Expression
1		dochfln0.h	. . 3 ⊢ 𝐻 = (LHyp‘𝐾)
2		dochfln0.o	. . 3 ⊢ ⊥ = ((ocH‘𝐾)‘𝑊)
3		dochfln0.u	. . 3 ⊢ 𝑈 = ((DVecH‘𝐾)‘𝑊)
4		dochfln0.v	. . 3 ⊢ 𝑉 = (Base‘𝑈)
5		dochfln0.z	. . 3 ⊢ 0 = (0_g‘𝑈)
6		dochfln0.k	. . 3 ⊢ (𝜑 → (𝐾 ∈ HL ∧ 𝑊 ∈ 𝐻))
7		dochfln0.f	. . . . . . 7 ⊢ 𝐹 = (LFnl‘𝑈)
8		dochfln0.l	. . . . . . 7 ⊢ 𝐿 = (LKer‘𝑈)
9	1, 3, 6	dvhlmod 41609	. . . . . . 7 ⊢ (𝜑 → 𝑈 ∈ LMod)
10		dochfln0.g	. . . . . . 7 ⊢ (𝜑 → 𝐺 ∈ 𝐹)
11	4, 7, 8, 9, 10	lkrssv 39595	. . . . . 6 ⊢ (𝜑 → (𝐿‘𝐺) ⊆ 𝑉)
12	1, 3, 4, 2	dochssv 41854	. . . . . 6 ⊢ (((𝐾 ∈ HL ∧ 𝑊 ∈ 𝐻) ∧ (𝐿‘𝐺) ⊆ 𝑉) → ( ⊥ ‘(𝐿‘𝐺)) ⊆ 𝑉)
13	6, 11, 12	syl2anc 590	. . . . 5 ⊢ (𝜑 → ( ⊥ ‘(𝐿‘𝐺)) ⊆ 𝑉)
14	13	ssdifd 4082	. . . 4 ⊢ (𝜑 → (( ⊥ ‘(𝐿‘𝐺)) ∖ { 0 }) ⊆ (𝑉 ∖ { 0 }))
15		dochfln0.x	. . . 4 ⊢ (𝜑 → 𝑋 ∈ (( ⊥ ‘(𝐿‘𝐺)) ∖ { 0 }))
16	14, 15	sseldd 3923	. . 3 ⊢ (𝜑 → 𝑋 ∈ (𝑉 ∖ { 0 }))
17	1, 2, 3, 4, 5, 6, 16	dochnel 41892	. 2 ⊢ (𝜑 → ¬ 𝑋 ∈ ( ⊥ ‘{𝑋}))
18	15	eldifad 3902	. . . . . 6 ⊢ (𝜑 → 𝑋 ∈ ( ⊥ ‘(𝐿‘𝐺)))
19	13, 18	sseldd 3923	. . . . 5 ⊢ (𝜑 → 𝑋 ∈ 𝑉)
20	19	biantrurd 537	. . . 4 ⊢ (𝜑 → ((𝐺‘𝑋) = 𝑁 ↔ (𝑋 ∈ 𝑉 ∧ (𝐺‘𝑋) = 𝑁)))
21		dochfln0.r	. . . . . 6 ⊢ 𝑅 = (Scalar‘𝑈)
22		dochfln0.n	. . . . . 6 ⊢ 𝑁 = (0_g‘𝑅)
23	4, 21, 22, 7, 8	ellkr 39588	. . . . 5 ⊢ ((𝑈 ∈ LMod ∧ 𝐺 ∈ 𝐹) → (𝑋 ∈ (𝐿‘𝐺) ↔ (𝑋 ∈ 𝑉 ∧ (𝐺‘𝑋) = 𝑁)))
24	9, 10, 23	syl2anc 590	. . . 4 ⊢ (𝜑 → (𝑋 ∈ (𝐿‘𝐺) ↔ (𝑋 ∈ 𝑉 ∧ (𝐺‘𝑋) = 𝑁)))
25	1, 2, 3, 4, 5, 7, 8, 6, 10, 15	dochsnkr 41971	. . . . 5 ⊢ (𝜑 → (𝐿‘𝐺) = ( ⊥ ‘{𝑋}))
26	25	eleq2d 2826	. . . 4 ⊢ (𝜑 → (𝑋 ∈ (𝐿‘𝐺) ↔ 𝑋 ∈ ( ⊥ ‘{𝑋})))
27	20, 24, 26	3bitr2rd 309	. . 3 ⊢ (𝜑 → (𝑋 ∈ ( ⊥ ‘{𝑋}) ↔ (𝐺‘𝑋) = 𝑁))
28	27	necon3bbid 2972	. 2 ⊢ (𝜑 → (¬ 𝑋 ∈ ( ⊥ ‘{𝑋}) ↔ (𝐺‘𝑋) ≠ 𝑁))
29	17, 28	mpbid 233	1 ⊢ (𝜑 → (𝐺‘𝑋) ≠ 𝑁)

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ↔ wb 207 ∧ wa 396 = wceq 1547 ∈ wcel 2119 ≠ wne 2935 ∖ cdif 3887 ⊆ wss 3890 {csn 4562 ‘cfv 6492 Basecbs 17177 Scalarcsca 17221 0_gc0g 17400 LModclmod 20857 LFnlclfn 39556 LKerclk 39584 HLchlt 39849 LHypclh 40483 DVecHcdvh 41577 ocHcoch 41846

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-11 2168 ax-12 2189 ax-ext 2712 ax-rep 5206 ax-sep 5225 ax-nul 5235 ax-pow 5301 ax-pr 5369 ax-un 7685 ax-cnex 11092 ax-resscn 11093 ax-1cn 11094 ax-icn 11095 ax-addcl 11096 ax-addrcl 11097 ax-mulcl 11098 ax-mulrcl 11099 ax-mulcom 11100 ax-addass 11101 ax-mulass 11102 ax-distr 11103 ax-i2m1 11104 ax-1ne0 11105 ax-1rid 11106 ax-rnegex 11107 ax-rrecex 11108 ax-cnre 11109 ax-pre-lttri 11110 ax-pre-lttrn 11111 ax-pre-ltadd 11112 ax-pre-mulgt0 11113 ax-riotaBAD 39452

This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3or 1093 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2719 df-cleq 2732 df-clel 2815 df-nfc 2889 df-ne 2936 df-nel 3040 df-ral 3055 df-rex 3065 df-rmo 3345 df-reu 3346 df-rab 3393 df-v 3434 df-sbc 3731 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-pss 3910 df-nul 4269 df-if 4462 df-pw 4538 df-sn 4563 df-pr 4565 df-tp 4567 df-op 4569 df-uni 4846 df-int 4885 df-iun 4930 df-iin 4931 df-br 5080 df-opab 5142 df-mpt 5161 df-tr 5187 df-id 5520 df-eprel 5525 df-po 5533 df-so 5534 df-fr 5578 df-we 5580 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 df-pred 6259 df-ord 6320 df-on 6321 df-lim 6322 df-suc 6323 df-iota 6448 df-fun 6494 df-fn 6495 df-f 6496 df-f1 6497 df-fo 6498 df-f1o 6499 df-fv 6500 df-riota 7320 df-ov 7366 df-oprab 7367 df-mpo 7368 df-om 7814 df-1st 7938 df-2nd 7939 df-tpos 8173 df-undef 8220 df-frecs 8228 df-wrecs 8259 df-recs 8308 df-rdg 8346 df-1o 8402 df-er 8640 df-map 8772 df-en 8891 df-dom 8892 df-sdom 8893 df-fin 8894 df-pnf 11179 df-mnf 11180 df-xr 11181 df-ltxr 11182 df-le 11183 df-sub 11377 df-neg 11378 df-nn 12173 df-2 12242 df-3 12243 df-4 12244 df-5 12245 df-6 12246 df-n0 12436 df-z 12523 df-uz 12787 df-fz 13460 df-struct 17115 df-sets 17132 df-slot 17150 df-ndx 17162 df-base 17178 df-ress 17199 df-plusg 17231 df-mulr 17232 df-sca 17234 df-vsca 17235 df-0g 17402 df-proset 18258 df-poset 18277 df-plt 18292 df-lub 18308 df-glb 18309 df-join 18310 df-meet 18311 df-p0 18387 df-p1 18388 df-lat 18396 df-clat 18463 df-mgm 18606 df-sgrp 18685 df-mnd 18701 df-submnd 18750 df-grp 18910 df-minusg 18911 df-sbg 18912 df-subg 19097 df-cntz 19290 df-lsm 19609 df-cmn 19755 df-abl 19756 df-mgp 20120 df-rng 20132 df-ur 20161 df-ring 20214 df-oppr 20315 df-dvdsr 20335 df-unit 20336 df-invr 20366 df-dvr 20379 df-drng 20710 df-lmod 20859 df-lss 20929 df-lsp 20969 df-lvec 21100 df-lsatoms 39475 df-lshyp 39476 df-lfl 39557 df-lkr 39585 df-oposet 39675 df-ol 39677 df-oml 39678 df-covers 39765 df-ats 39766 df-atl 39797 df-cvlat 39821 df-hlat 39850 df-llines 39997 df-lplanes 39998 df-lvols 39999 df-lines 40000 df-psubsp 40002 df-pmap 40003 df-padd 40295 df-lhyp 40487 df-laut 40488 df-ldil 40603 df-ltrn 40604 df-trl 40658 df-tgrp 41242 df-tendo 41254 df-edring 41256 df-dveca 41502 df-disoa 41528 df-dvech 41578 df-dib 41638 df-dic 41672 df-dih 41728 df-doch 41847 df-djh 41894

This theorem is referenced by: dochkr1 41977 dochkr1OLDN 41978 lcfl6lem 41997

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