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| Mirrors > Home > MPE Home > Th. List > lsppratlem1 | Structured version Visualization version GIF version | ||
| Description: Lemma for lspprat 21329. 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 21319 (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 4754 | . . . . . 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 4055 | . . . . . . . . 9 ⊢ (𝜑 → 𝑈 ⊆ (𝑁‘{𝑋, 𝑌})) |
| 10 | lsppratlem1.x2 | . . . . . . . . . 10 ⊢ (𝜑 → 𝑥 ∈ (𝑈 ∖ { 0 })) | |
| 11 | 10 | eldifad 3918 | . . . . . . . . 9 ⊢ (𝜑 → 𝑥 ∈ 𝑈) |
| 12 | 9, 11 | sseldd 3939 | . . . . . . . 8 ⊢ (𝜑 → 𝑥 ∈ (𝑁‘{𝑋, 𝑌})) |
| 13 | prcom 4700 | . . . . . . . . . 10 ⊢ {𝑋, 𝑌} = {𝑌, 𝑋} | |
| 14 | df-pr 4594 | . . . . . . . . . 10 ⊢ {𝑌, 𝑋} = ({𝑌} ∪ {𝑋}) | |
| 15 | 13, 14 | eqtri 2788 | . . . . . . . . 9 ⊢ {𝑋, 𝑌} = ({𝑌} ∪ {𝑋}) |
| 16 | 15 | fveq2i 6888 | . . . . . . . 8 ⊢ (𝑁‘{𝑋, 𝑌}) = (𝑁‘({𝑌} ∪ {𝑋})) |
| 17 | 12, 16 | eleqtrdi 2875 | . . . . . . 7 ⊢ (𝜑 → 𝑥 ∈ (𝑁‘({𝑌} ∪ {𝑋}))) |
| 18 | 17 | anim1i 627 | . . . . . 6 ⊢ ((𝜑 ∧ ¬ 𝑥 ∈ (𝑁‘{𝑌})) → (𝑥 ∈ (𝑁‘({𝑌} ∪ {𝑋})) ∧ ¬ 𝑥 ∈ (𝑁‘{𝑌}))) |
| 19 | eldif 3916 | . . . . . 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 21319 | . . . . 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 4594 | . . . . . 6 ⊢ {𝑌, 𝑥} = ({𝑌} ∪ {𝑥}) | |
| 27 | prcom 4700 | . . . . . 6 ⊢ {𝑌, 𝑥} = {𝑥, 𝑌} | |
| 28 | 26, 27 | eqtr3i 2790 | . . . . 5 ⊢ ({𝑌} ∪ {𝑥}) = {𝑥, 𝑌} |
| 29 | 28 | fveq2i 6888 | . . . 4 ⊢ (𝑁‘({𝑌} ∪ {𝑥})) = (𝑁‘{𝑥, 𝑌}) |
| 30 | 25, 29 | eleqtrdi 2875 | . . 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 1570 ∈ wcel 2146 ∖ cdif 3903 ∪ cun 3904 ⊆ wss 3906 ⊊ wpss 3907 {csn 4591 {cpr 4593 ‘cfv 6540 Basecbs 17293 0gc0g 17516 LSubSpclss 21104 LSpanclspn 21144 LVecclvec 21275 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2737 ax-rep 5240 ax-sep 5259 ax-nul 5271 ax-pow 5338 ax-pr 5406 ax-un 7742 ax-cnex 11173 ax-resscn 11174 ax-1cn 11175 ax-icn 11176 ax-addcl 11177 ax-addrcl 11178 ax-mulcl 11179 ax-mulrcl 11180 ax-mulcom 11181 ax-addass 11182 ax-mulass 11183 ax-distr 11184 ax-i2m1 11185 ax-1ne0 11186 ax-1rid 11187 ax-rnegex 11188 ax-rrecex 11189 ax-cnre 11190 ax-pre-lttri 11191 ax-pre-lttrn 11192 ax-pre-ltadd 11193 ax-pre-mulgt0 11194 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-nel 3067 df-ral 3082 df-rex 3092 df-rmo 3371 df-reu 3372 df-rab 3419 df-v 3459 df-sbc 3747 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4287 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4875 df-int 4915 df-iun 4960 df-br 5112 df-opab 5176 df-mpt 5195 df-tr 5221 df-id 5558 df-eprel 5563 df-po 5571 df-so 5572 df-fr 5616 df-we 5618 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-pred 6306 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6496 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-riota 7376 df-ov 7422 df-oprab 7423 df-mpo 7424 df-om 7869 df-1st 7992 df-2nd 7993 df-tpos 8228 df-frecs 8284 df-wrecs 8315 df-recs 8364 df-rdg 8403 df-er 8700 df-en 8950 df-dom 8951 df-sdom 8952 df-pnf 11262 df-mnf 11263 df-xr 11264 df-ltxr 11265 df-le 11266 df-sub 11460 df-neg 11461 df-nn 12251 df-2 12320 df-3 12321 df-sets 17248 df-slot 17266 df-ndx 17278 df-base 17294 df-ress 17315 df-plusg 17347 df-mulr 17348 df-0g 17518 df-mgm 18722 df-sgrp 18811 df-mnd 18827 df-grp 19049 df-minusg 19050 df-sbg 19051 df-cmn 19898 df-abl 19899 df-mgp 20263 df-rng 20277 df-ur 20310 df-ring 20363 df-oppr 20467 df-dvdsr 20487 df-unit 20488 df-invr 20518 df-drng 20881 df-lmod 21035 df-lss 21105 df-lsp 21145 df-lvec 21276 |
| This theorem is used by: lsppratlem5 21327 |
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