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| Mirrors > Home > MPE Home > Th. List > lsppratlem1 | Structured version Visualization version GIF version | ||
| Description: Lemma for lspprat 21443. Let 𝑥 ∈ (𝑈 ∖ {0}) (if there is no such 𝑥 then 𝑈 is the zero subspace), and let 𝑦 ∈ (𝑈 ∖ (𝑁‘{𝑥})) (assuming the conclusion is false). The goal is to write 𝑋, 𝑌 in terms of 𝑥, 𝑦, which would normally be done by solving the system of linear equations. The span equivalent of this process is lspsolv 21433 (hence the name), which we use extensively below. In this lemma, we show that since 𝑥 ∈ (𝑁‘{𝑋, 𝑌}), either 𝑥 ∈ (𝑁‘{𝑌}) or 𝑋 ∈ (𝑁‘{𝑥, 𝑌}). (Contributed by NM, 29-Aug-2014.) |
| Ref | Expression |
|---|---|
| lspprat.v | ⊢ 𝑉 = (Base‘𝑊) |
| lspprat.s | ⊢ 𝑆 = (LSubSp‘𝑊) |
| lspprat.n | ⊢ 𝑁 = (LSpan‘𝑊) |
| lspprat.w | ⊢ (𝜑 → 𝑊 ∈ LVec) |
| lspprat.u | ⊢ (𝜑 → 𝑈 ∈ 𝑆) |
| lspprat.x | ⊢ (𝜑 → 𝑋 ∈ 𝑉) |
| lspprat.y | ⊢ (𝜑 → 𝑌 ∈ 𝑉) |
| lspprat.p | ⊢ (𝜑 → 𝑈 ⊊ (𝑁‘{𝑋, 𝑌})) |
| lsppratlem1.o | ⊢ 0 = (0g‘𝑊) |
| lsppratlem1.x2 | ⊢ (𝜑 → 𝑥 ∈ (𝑈 ∖ { 0 })) |
| lsppratlem1.y2 | ⊢ (𝜑 → 𝑦 ∈ (𝑈 ∖ (𝑁‘{𝑥}))) |
| Ref | Expression |
|---|---|
| lsppratlem1 | ⊢ (𝜑 → (𝑥 ∈ (𝑁‘{𝑌}) ∨ 𝑋 ∈ (𝑁‘{𝑥, 𝑌}))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | lspprat.w | . . . . . 6 ⊢ (𝜑 → 𝑊 ∈ LVec) | |
| 2 | 1 | adantr 486 | . . . . 5 ⊢ ((𝜑 ∧ ¬ 𝑥 ∈ (𝑁‘{𝑌})) → 𝑊 ∈ LVec) |
| 3 | lspprat.y | . . . . . . 7 ⊢ (𝜑 → 𝑌 ∈ 𝑉) | |
| 4 | 3 | snssd 4746 | . . . . . 6 ⊢ (𝜑 → {𝑌} ⊆ 𝑉) |
| 5 | 4 | adantr 486 | . . . . 5 ⊢ ((𝜑 ∧ ¬ 𝑥 ∈ (𝑁‘{𝑌})) → {𝑌} ⊆ 𝑉) |
| 6 | lspprat.x | . . . . . 6 ⊢ (𝜑 → 𝑋 ∈ 𝑉) | |
| 7 | 6 | adantr 486 | . . . . 5 ⊢ ((𝜑 ∧ ¬ 𝑥 ∈ (𝑁‘{𝑌})) → 𝑋 ∈ 𝑉) |
| 8 | lspprat.p | . . . . . . . . . 10 ⊢ (𝜑 → 𝑈 ⊊ (𝑁‘{𝑋, 𝑌})) | |
| 9 | 8 | pssssd 4029 | . . . . . . . . 9 ⊢ (𝜑 → 𝑈 ⊆ (𝑁‘{𝑋, 𝑌})) |
| 10 | lsppratlem1.x2 | . . . . . . . . . 10 ⊢ (𝜑 → 𝑥 ∈ (𝑈 ∖ { 0 })) | |
| 11 | 10 | eldifad 4053 | . . . . . . . . 9 ⊢ (𝜑 → 𝑥 ∈ 𝑈) |
| 12 | 9, 11 | sseldd 3913 | . . . . . . . 8 ⊢ (𝜑 → 𝑥 ∈ (𝑁‘{𝑋, 𝑌})) |
| 13 | prcom 4692 | . . . . . . . . . 10 ⊢ {𝑋, 𝑌} = {𝑌, 𝑋} | |
| 14 | df-pr 4590 | . . . . . . . . . 10 ⊢ {𝑌, 𝑋} = ({𝑌} ∪ {𝑋}) | |
| 15 | 13, 14 | eqtri 2786 | . . . . . . . . 9 ⊢ {𝑋, 𝑌} = ({𝑌} ∪ {𝑋}) |
| 16 | 15 | fveq2i 6896 | . . . . . . . 8 ⊢ (𝑁‘{𝑋, 𝑌}) = (𝑁‘({𝑌} ∪ {𝑋})) |
| 17 | 12, 16 | eleqtrdi 2873 | . . . . . . 7 ⊢ (𝜑 → 𝑥 ∈ (𝑁‘({𝑌} ∪ {𝑋}))) |
| 18 | 17 | anim1i 627 | . . . . . 6 ⊢ ((𝜑 ∧ ¬ 𝑥 ∈ (𝑁‘{𝑌})) → (𝑥 ∈ (𝑁‘({𝑌} ∪ {𝑋})) ∧ ¬ 𝑥 ∈ (𝑁‘{𝑌}))) |
| 19 | eldif 4051 | . . . . . 6 ⊢ (𝑥 ∈ ((𝑁‘({𝑌} ∪ {𝑋})) ∖ (𝑁‘{𝑌})) ↔ (𝑥 ∈ (𝑁‘({𝑌} ∪ {𝑋})) ∧ ¬ 𝑥 ∈ (𝑁‘{𝑌}))) | |
| 20 | 18, 19 | sylibr 237 | . . . . 5 ⊢ ((𝜑 ∧ ¬ 𝑥 ∈ (𝑁‘{𝑌})) → 𝑥 ∈ ((𝑁‘({𝑌} ∪ {𝑋})) ∖ (𝑁‘{𝑌}))) |
| 21 | lspprat.v | . . . . . 6 ⊢ 𝑉 = (Base‘𝑊) | |
| 22 | lspprat.s | . . . . . 6 ⊢ 𝑆 = (LSubSp‘𝑊) | |
| 23 | lspprat.n | . . . . . 6 ⊢ 𝑁 = (LSpan‘𝑊) | |
| 24 | 21, 22, 23 | lspsolv 21433 | . . . . 5 ⊢ ((𝑊 ∈ LVec ∧ ({𝑌} ⊆ 𝑉 ∧ 𝑋 ∈ 𝑉 ∧ 𝑥 ∈ ((𝑁‘({𝑌} ∪ {𝑋})) ∖ (𝑁‘{𝑌})))) → 𝑋 ∈ (𝑁‘({𝑌} ∪ {𝑥}))) |
| 25 | 2, 5, 7, 20, 24 | syl13anc 1399 | . . . 4 ⊢ ((𝜑 ∧ ¬ 𝑥 ∈ (𝑁‘{𝑌})) → 𝑋 ∈ (𝑁‘({𝑌} ∪ {𝑥}))) |
| 26 | df-pr 4590 | . . . . . 6 ⊢ {𝑌, 𝑥} = ({𝑌} ∪ {𝑥}) | |
| 27 | prcom 4692 | . . . . . 6 ⊢ {𝑌, 𝑥} = {𝑥, 𝑌} | |
| 28 | 26, 27 | eqtr3i 2788 | . . . . 5 ⊢ ({𝑌} ∪ {𝑥}) = {𝑥, 𝑌} |
| 29 | 28 | fveq2i 6896 | . . . 4 ⊢ (𝑁‘({𝑌} ∪ {𝑥})) = (𝑁‘{𝑥, 𝑌}) |
| 30 | 25, 29 | eleqtrdi 2873 | . . 3 ⊢ ((𝜑 ∧ ¬ 𝑥 ∈ (𝑁‘{𝑌})) → 𝑋 ∈ (𝑁‘{𝑥, 𝑌})) |
| 31 | 30 | ex 418 | . 2 ⊢ (𝜑 → (¬ 𝑥 ∈ (𝑁‘{𝑌}) → 𝑋 ∈ (𝑁‘{𝑥, 𝑌}))) |
| 32 | 31 | orrd 877 | 1 ⊢ (𝜑 → (𝑥 ∈ (𝑁‘{𝑌}) ∨ 𝑋 ∈ (𝑁‘{𝑥, 𝑌}))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ∧ wa 401 ∨ wo 861 = wceq 1569 ∈ wcel 2146 ⊆ wss 3899 ⊊ wpss 4015 ∖ cdif 4047 ∪ cun 4151 {csn 4587 {cpr 4589 ‘cfv 6546 Basecbs 17399 0gc0g 17622 LSubSpclss 21218 LSpanclspn 21258 LVecclvec 21389 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1944 ax-6 2001 ax-7 2042 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2196 ax-12 2215 ax-ext 2735 ax-rep 5234 ax-sep 5251 ax-nul 5262 ax-pow 5330 ax-pr 5394 ax-un 7758 ax-cnex 11266 ax-resscn 11267 ax-1cn 11268 ax-icn 11269 ax-addcl 11270 ax-addrcl 11271 ax-mulcl 11272 ax-mulrcl 11273 ax-mulcom 11274 ax-addass 11275 ax-mulass 11276 ax-distr 11277 ax-i2m1 11278 ax-1ne0 11279 ax-1rid 11280 ax-rnegex 11281 ax-rrecex 11282 ax-cnre 11283 ax-pre-lttri 11284 ax-pre-lttrn 11285 ax-pre-ltadd 11286 ax-pre-mulgt0 11287 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2101 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-nel 3065 df-ral 3080 df-rex 3090 df-rmo 3368 df-reu 3369 df-rab 3416 df-v 3455 df-sbc 3742 df-csb 3851 df-ss 3900 df-pss 4016 df-dif 4049 df-in 4093 df-un 4153 df-nul 4281 df-if 4485 df-pw 4561 df-sn 4588 df-pr 4590 df-op 4838 df-uni 4870 df-int 4910 df-iun 4955 df-br 5106 df-opab 5170 df-mpt 5189 df-tr 5215 df-id 5549 df-eprel 5554 df-po 5562 df-so 5563 df-fr 5607 df-we 5609 df-xp 5660 df-rel 5661 df-cnv 5662 df-co 5663 df-dm 5664 df-rn 5665 df-res 5666 df-ima 5667 df-pred 6310 df-ord 6371 df-on 6372 df-lim 6373 df-suc 6374 df-iota 6500 df-fun 6548 df-fn 6549 df-f 6550 df-f1 6551 df-fo 6552 df-f1o 6553 df-fv 6554 df-riota 7384 df-ov 7430 df-oprab 7431 df-mpo 7432 df-om 7885 df-1st 8008 df-2nd 8009 df-tpos 8254 df-frecs 8310 df-wrecs 8341 df-recs 8390 df-rdg 8429 df-er 8728 df-en 8985 df-dom 8986 df-sdom 8987 df-pnf 11355 df-mnf 11356 df-xr 11357 df-ltxr 11358 df-le 11359 df-sub 11553 df-neg 11554 df-nn 12346 df-2 12415 df-3 12416 df-sets 17354 df-slot 17372 df-ndx 17384 df-base 17400 df-ress 17421 df-plusg 17453 df-mulr 17454 df-0g 17624 df-mgm 18828 df-sgrp 18920 df-mnd 18936 df-grp 19159 df-minusg 19160 df-sbg 19161 df-cmn 20008 df-abl 20009 df-mgp 20373 df-rng 20387 df-ur 20420 df-ring 20473 df-oppr 20579 df-dvdsr 20599 df-unit 20600 df-invr 20630 df-drng 20994 df-lmod 21149 df-lss 21219 df-lsp 21259 df-lvec 21390 |
| This theorem is used by: lsppratlem5 21441 |
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