Theorem spanuni 29807

Description: The span of a union is the subspace sum of spans. (Contributed by NM, 2-Jun-2004.) (New usage is discouraged.)

Hypotheses

Ref	Expression
spanun.1	⊢ 𝐴 ⊆ ℋ
spanun.2	⊢ 𝐵 ⊆ ℋ

Assertion

Ref	Expression
spanuni	⊢ (span‘(𝐴 ∪ 𝐵)) = ((span‘𝐴) +ℋ (span‘𝐵))

Proof of Theorem spanuni

Dummy variables 𝑥 𝑦 𝑧 𝑤 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		spanun.1	. . . . . . 7 ⊢ 𝐴 ⊆ ℋ
2		spancl 29599	. . . . . . 7 ⊢ (𝐴 ⊆ ℋ → (span‘𝐴) ∈ Sℋ )
3	1, 2	ax-mp 5	. . . . . 6 ⊢ (span‘𝐴) ∈ Sℋ
4		spanun.2	. . . . . . 7 ⊢ 𝐵 ⊆ ℋ
5		spancl 29599	. . . . . . 7 ⊢ (𝐵 ⊆ ℋ → (span‘𝐵) ∈ Sℋ )
6	4, 5	ax-mp 5	. . . . . 6 ⊢ (span‘𝐵) ∈ Sℋ
7	3, 6	shscli 29580	. . . . 5 ⊢ ((span‘𝐴) +ℋ (span‘𝐵)) ∈ Sℋ
8	7	shssii 29476	. . . 4 ⊢ ((span‘𝐴) +ℋ (span‘𝐵)) ⊆ ℋ
9		spanss2 29608	. . . . . . 7 ⊢ (𝐴 ⊆ ℋ → 𝐴 ⊆ (span‘𝐴))
10	1, 9	ax-mp 5	. . . . . 6 ⊢ 𝐴 ⊆ (span‘𝐴)
11		spanss2 29608	. . . . . . 7 ⊢ (𝐵 ⊆ ℋ → 𝐵 ⊆ (span‘𝐵))
12	4, 11	ax-mp 5	. . . . . 6 ⊢ 𝐵 ⊆ (span‘𝐵)
13		unss12 4112	. . . . . 6 ⊢ ((𝐴 ⊆ (span‘𝐴) ∧ 𝐵 ⊆ (span‘𝐵)) → (𝐴 ∪ 𝐵) ⊆ ((span‘𝐴) ∪ (span‘𝐵)))
14	10, 12, 13	mp2an 688	. . . . 5 ⊢ (𝐴 ∪ 𝐵) ⊆ ((span‘𝐴) ∪ (span‘𝐵))
15	3, 6	shunssi 29631	. . . . 5 ⊢ ((span‘𝐴) ∪ (span‘𝐵)) ⊆ ((span‘𝐴) +ℋ (span‘𝐵))
16	14, 15	sstri 3926	. . . 4 ⊢ (𝐴 ∪ 𝐵) ⊆ ((span‘𝐴) +ℋ (span‘𝐵))
17		spanss 29611	. . . 4 ⊢ ((((span‘𝐴) +ℋ (span‘𝐵)) ⊆ ℋ ∧ (𝐴 ∪ 𝐵) ⊆ ((span‘𝐴) +ℋ (span‘𝐵))) → (span‘(𝐴 ∪ 𝐵)) ⊆ (span‘((span‘𝐴) +ℋ (span‘𝐵))))
18	8, 16, 17	mp2an 688	. . 3 ⊢ (span‘(𝐴 ∪ 𝐵)) ⊆ (span‘((span‘𝐴) +ℋ (span‘𝐵)))
19		spanid 29610	. . . 4 ⊢ (((span‘𝐴) +ℋ (span‘𝐵)) ∈ Sℋ → (span‘((span‘𝐴) +ℋ (span‘𝐵))) = ((span‘𝐴) +ℋ (span‘𝐵)))
20	7, 19	ax-mp 5	. . 3 ⊢ (span‘((span‘𝐴) +ℋ (span‘𝐵))) = ((span‘𝐴) +ℋ (span‘𝐵))
21	18, 20	sseqtri 3953	. 2 ⊢ (span‘(𝐴 ∪ 𝐵)) ⊆ ((span‘𝐴) +ℋ (span‘𝐵))
22	3, 6	shseli 29579	. . . . 5 ⊢ (𝑥 ∈ ((span‘𝐴) +ℋ (span‘𝐵)) ↔ ∃𝑧 ∈ (span‘𝐴)∃𝑤 ∈ (span‘𝐵)𝑥 = (𝑧 +ℎ 𝑤))
23		r2ex 3231	. . . . 5 ⊢ (∃𝑧 ∈ (span‘𝐴)∃𝑤 ∈ (span‘𝐵)𝑥 = (𝑧 +ℎ 𝑤) ↔ ∃𝑧∃𝑤((𝑧 ∈ (span‘𝐴) ∧ 𝑤 ∈ (span‘𝐵)) ∧ 𝑥 = (𝑧 +ℎ 𝑤)))
24	22, 23	bitri 274	. . . 4 ⊢ (𝑥 ∈ ((span‘𝐴) +ℋ (span‘𝐵)) ↔ ∃𝑧∃𝑤((𝑧 ∈ (span‘𝐴) ∧ 𝑤 ∈ (span‘𝐵)) ∧ 𝑥 = (𝑧 +ℎ 𝑤)))
25		vex 3426	. . . . . . . . . . 11 ⊢ 𝑧 ∈ V
26	25	elspani 29806	. . . . . . . . . 10 ⊢ (𝐴 ⊆ ℋ → (𝑧 ∈ (span‘𝐴) ↔ ∀𝑦 ∈ Sℋ (𝐴 ⊆ 𝑦 → 𝑧 ∈ 𝑦)))
27	1, 26	ax-mp 5	. . . . . . . . 9 ⊢ (𝑧 ∈ (span‘𝐴) ↔ ∀𝑦 ∈ Sℋ (𝐴 ⊆ 𝑦 → 𝑧 ∈ 𝑦))
28		vex 3426	. . . . . . . . . . 11 ⊢ 𝑤 ∈ V
29	28	elspani 29806	. . . . . . . . . 10 ⊢ (𝐵 ⊆ ℋ → (𝑤 ∈ (span‘𝐵) ↔ ∀𝑦 ∈ Sℋ (𝐵 ⊆ 𝑦 → 𝑤 ∈ 𝑦)))
30	4, 29	ax-mp 5	. . . . . . . . 9 ⊢ (𝑤 ∈ (span‘𝐵) ↔ ∀𝑦 ∈ Sℋ (𝐵 ⊆ 𝑦 → 𝑤 ∈ 𝑦))
31	27, 30	anbi12i 626	. . . . . . . 8 ⊢ ((𝑧 ∈ (span‘𝐴) ∧ 𝑤 ∈ (span‘𝐵)) ↔ (∀𝑦 ∈ Sℋ (𝐴 ⊆ 𝑦 → 𝑧 ∈ 𝑦) ∧ ∀𝑦 ∈ Sℋ (𝐵 ⊆ 𝑦 → 𝑤 ∈ 𝑦)))
32		r19.26 3094	. . . . . . . 8 ⊢ (∀𝑦 ∈ Sℋ ((𝐴 ⊆ 𝑦 → 𝑧 ∈ 𝑦) ∧ (𝐵 ⊆ 𝑦 → 𝑤 ∈ 𝑦)) ↔ (∀𝑦 ∈ Sℋ (𝐴 ⊆ 𝑦 → 𝑧 ∈ 𝑦) ∧ ∀𝑦 ∈ Sℋ (𝐵 ⊆ 𝑦 → 𝑤 ∈ 𝑦)))
33	31, 32	bitr4i 277	. . . . . . 7 ⊢ ((𝑧 ∈ (span‘𝐴) ∧ 𝑤 ∈ (span‘𝐵)) ↔ ∀𝑦 ∈ Sℋ ((𝐴 ⊆ 𝑦 → 𝑧 ∈ 𝑦) ∧ (𝐵 ⊆ 𝑦 → 𝑤 ∈ 𝑦)))
34		r19.27v 3109	. . . . . . 7 ⊢ ((∀𝑦 ∈ Sℋ ((𝐴 ⊆ 𝑦 → 𝑧 ∈ 𝑦) ∧ (𝐵 ⊆ 𝑦 → 𝑤 ∈ 𝑦)) ∧ 𝑥 = (𝑧 +ℎ 𝑤)) → ∀𝑦 ∈ Sℋ (((𝐴 ⊆ 𝑦 → 𝑧 ∈ 𝑦) ∧ (𝐵 ⊆ 𝑦 → 𝑤 ∈ 𝑦)) ∧ 𝑥 = (𝑧 +ℎ 𝑤)))
35	33, 34	sylanb 580	. . . . . 6 ⊢ (((𝑧 ∈ (span‘𝐴) ∧ 𝑤 ∈ (span‘𝐵)) ∧ 𝑥 = (𝑧 +ℎ 𝑤)) → ∀𝑦 ∈ Sℋ (((𝐴 ⊆ 𝑦 → 𝑧 ∈ 𝑦) ∧ (𝐵 ⊆ 𝑦 → 𝑤 ∈ 𝑦)) ∧ 𝑥 = (𝑧 +ℎ 𝑤)))
36		unss 4114	. . . . . . . . . . . 12 ⊢ ((𝐴 ⊆ 𝑦 ∧ 𝐵 ⊆ 𝑦) ↔ (𝐴 ∪ 𝐵) ⊆ 𝑦)
37		anim12 805	. . . . . . . . . . . 12 ⊢ (((𝐴 ⊆ 𝑦 → 𝑧 ∈ 𝑦) ∧ (𝐵 ⊆ 𝑦 → 𝑤 ∈ 𝑦)) → ((𝐴 ⊆ 𝑦 ∧ 𝐵 ⊆ 𝑦) → (𝑧 ∈ 𝑦 ∧ 𝑤 ∈ 𝑦)))
38	36, 37	syl5bir 242	. . . . . . . . . . 11 ⊢ (((𝐴 ⊆ 𝑦 → 𝑧 ∈ 𝑦) ∧ (𝐵 ⊆ 𝑦 → 𝑤 ∈ 𝑦)) → ((𝐴 ∪ 𝐵) ⊆ 𝑦 → (𝑧 ∈ 𝑦 ∧ 𝑤 ∈ 𝑦)))
39		shaddcl 29480	. . . . . . . . . . . 12 ⊢ ((𝑦 ∈ Sℋ ∧ 𝑧 ∈ 𝑦 ∧ 𝑤 ∈ 𝑦) → (𝑧 +ℎ 𝑤) ∈ 𝑦)
40	39	3expib 1120	. . . . . . . . . . 11 ⊢ (𝑦 ∈ Sℋ → ((𝑧 ∈ 𝑦 ∧ 𝑤 ∈ 𝑦) → (𝑧 +ℎ 𝑤) ∈ 𝑦))
41	38, 40	sylan9r 508	. . . . . . . . . 10 ⊢ ((𝑦 ∈ Sℋ ∧ ((𝐴 ⊆ 𝑦 → 𝑧 ∈ 𝑦) ∧ (𝐵 ⊆ 𝑦 → 𝑤 ∈ 𝑦))) → ((𝐴 ∪ 𝐵) ⊆ 𝑦 → (𝑧 +ℎ 𝑤) ∈ 𝑦))
42		eleq1 2826	. . . . . . . . . . 11 ⊢ (𝑥 = (𝑧 +ℎ 𝑤) → (𝑥 ∈ 𝑦 ↔ (𝑧 +ℎ 𝑤) ∈ 𝑦))
43	42	biimprd 247	. . . . . . . . . 10 ⊢ (𝑥 = (𝑧 +ℎ 𝑤) → ((𝑧 +ℎ 𝑤) ∈ 𝑦 → 𝑥 ∈ 𝑦))
44	41, 43	sylan9 507	. . . . . . . . 9 ⊢ (((𝑦 ∈ Sℋ ∧ ((𝐴 ⊆ 𝑦 → 𝑧 ∈ 𝑦) ∧ (𝐵 ⊆ 𝑦 → 𝑤 ∈ 𝑦))) ∧ 𝑥 = (𝑧 +ℎ 𝑤)) → ((𝐴 ∪ 𝐵) ⊆ 𝑦 → 𝑥 ∈ 𝑦))
45	44	expl 457	. . . . . . . 8 ⊢ (𝑦 ∈ Sℋ → ((((𝐴 ⊆ 𝑦 → 𝑧 ∈ 𝑦) ∧ (𝐵 ⊆ 𝑦 → 𝑤 ∈ 𝑦)) ∧ 𝑥 = (𝑧 +ℎ 𝑤)) → ((𝐴 ∪ 𝐵) ⊆ 𝑦 → 𝑥 ∈ 𝑦)))
46	45	ralimia 3084	. . . . . . 7 ⊢ (∀𝑦 ∈ Sℋ (((𝐴 ⊆ 𝑦 → 𝑧 ∈ 𝑦) ∧ (𝐵 ⊆ 𝑦 → 𝑤 ∈ 𝑦)) ∧ 𝑥 = (𝑧 +ℎ 𝑤)) → ∀𝑦 ∈ Sℋ ((𝐴 ∪ 𝐵) ⊆ 𝑦 → 𝑥 ∈ 𝑦))
47	1, 4	unssi 4115	. . . . . . . 8 ⊢ (𝐴 ∪ 𝐵) ⊆ ℋ
48		vex 3426	. . . . . . . . 9 ⊢ 𝑥 ∈ V
49	48	elspani 29806	. . . . . . . 8 ⊢ ((𝐴 ∪ 𝐵) ⊆ ℋ → (𝑥 ∈ (span‘(𝐴 ∪ 𝐵)) ↔ ∀𝑦 ∈ Sℋ ((𝐴 ∪ 𝐵) ⊆ 𝑦 → 𝑥 ∈ 𝑦)))
50	47, 49	ax-mp 5	. . . . . . 7 ⊢ (𝑥 ∈ (span‘(𝐴 ∪ 𝐵)) ↔ ∀𝑦 ∈ Sℋ ((𝐴 ∪ 𝐵) ⊆ 𝑦 → 𝑥 ∈ 𝑦))
51	46, 50	sylibr 233	. . . . . 6 ⊢ (∀𝑦 ∈ Sℋ (((𝐴 ⊆ 𝑦 → 𝑧 ∈ 𝑦) ∧ (𝐵 ⊆ 𝑦 → 𝑤 ∈ 𝑦)) ∧ 𝑥 = (𝑧 +ℎ 𝑤)) → 𝑥 ∈ (span‘(𝐴 ∪ 𝐵)))
52	35, 51	syl 17	. . . . 5 ⊢ (((𝑧 ∈ (span‘𝐴) ∧ 𝑤 ∈ (span‘𝐵)) ∧ 𝑥 = (𝑧 +ℎ 𝑤)) → 𝑥 ∈ (span‘(𝐴 ∪ 𝐵)))
53	52	exlimivv 1936	. . . 4 ⊢ (∃𝑧∃𝑤((𝑧 ∈ (span‘𝐴) ∧ 𝑤 ∈ (span‘𝐵)) ∧ 𝑥 = (𝑧 +ℎ 𝑤)) → 𝑥 ∈ (span‘(𝐴 ∪ 𝐵)))
54	24, 53	sylbi 216	. . 3 ⊢ (𝑥 ∈ ((span‘𝐴) +ℋ (span‘𝐵)) → 𝑥 ∈ (span‘(𝐴 ∪ 𝐵)))
55	54	ssriv 3921	. 2 ⊢ ((span‘𝐴) +ℋ (span‘𝐵)) ⊆ (span‘(𝐴 ∪ 𝐵))
56	21, 55	eqssi 3933	1 ⊢ (span‘(𝐴 ∪ 𝐵)) = ((span‘𝐴) +ℋ (span‘𝐵))

Syntax hints:   → wi 4   ↔ wb 205   ∧ wa 395   = wceq 1539  ∃wex 1783   ∈ wcel 2108  ∀wral 3063  ∃wrex 3064   ∪ cun 3881   ⊆ wss 3883  ‘cfv 6418  (class class class)co 7255   ℋchba 29182   +_ℎ cva 29183   S_ℋ csh 29191   +_ℋ cph 29194  spancspn 29195

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1799  ax-4 1813  ax-5 1914  ax-6 1972  ax-7 2012  ax-8 2110  ax-9 2118  ax-10 2139  ax-11 2156  ax-12 2173  ax-ext 2709  ax-rep 5205  ax-sep 5218  ax-nul 5225  ax-pow 5283  ax-pr 5347  ax-un 7566  ax-cnex 10858  ax-resscn 10859  ax-1cn 10860  ax-icn 10861  ax-addcl 10862  ax-addrcl 10863  ax-mulcl 10864  ax-mulrcl 10865  ax-mulcom 10866  ax-addass 10867  ax-mulass 10868  ax-distr 10869  ax-i2m1 10870  ax-1ne0 10871  ax-1rid 10872  ax-rnegex 10873  ax-rrecex 10874  ax-cnre 10875  ax-pre-lttri 10876  ax-pre-lttrn 10877  ax-pre-ltadd 10878  ax-pre-mulgt0 10879  ax-pre-sup 10880  ax-addf 10881  ax-mulf 10882  ax-hilex 29262  ax-hfvadd 29263  ax-hvcom 29264  ax-hvass 29265  ax-hv0cl 29266  ax-hvaddid 29267  ax-hfvmul 29268  ax-hvmulid 29269  ax-hvmulass 29270  ax-hvdistr1 29271  ax-hvdistr2 29272  ax-hvmul0 29273  ax-hfi 29342  ax-his1 29345  ax-his2 29346  ax-his3 29347  ax-his4 29348

This theorem depends on definitions:  df-bi 206  df-an 396  df-or 844  df-3or 1086  df-3an 1087  df-tru 1542  df-fal 1552  df-ex 1784  df-nf 1788  df-sb 2069  df-mo 2540  df-eu 2569  df-clab 2716  df-cleq 2730  df-clel 2817  df-nfc 2888  df-ne 2943  df-nel 3049  df-ral 3068  df-rex 3069  df-reu 3070  df-rmo 3071  df-rab 3072  df-v 3424  df-sbc 3712  df-csb 3829  df-dif 3886  df-un 3888  df-in 3890  df-ss 3900  df-pss 3902  df-nul 4254  df-if 4457  df-pw 4532  df-sn 4559  df-pr 4561  df-tp 4563  df-op 4565  df-uni 4837  df-int 4877  df-iun 4923  df-br 5071  df-opab 5133  df-mpt 5154  df-tr 5188  df-id 5480  df-eprel 5486  df-po 5494  df-so 5495  df-fr 5535  df-we 5537  df-xp 5586  df-rel 5587  df-cnv 5588  df-co 5589  df-dm 5590  df-rn 5591  df-res 5592  df-ima 5593  df-pred 6191  df-ord 6254  df-on 6255  df-lim 6256  df-suc 6257  df-iota 6376  df-fun 6420  df-fn 6421  df-f 6422  df-f1 6423  df-fo 6424  df-f1o 6425  df-fv 6426  df-riota 7212  df-ov 7258  df-oprab 7259  df-mpo 7260  df-om 7688  df-1st 7804  df-2nd 7805  df-frecs 8068  df-wrecs 8099  df-recs 8173  df-rdg 8212  df-er 8456  df-map 8575  df-pm 8576  df-en 8692  df-dom 8693  df-sdom 8694  df-sup 9131  df-inf 9132  df-pnf 10942  df-mnf 10943  df-xr 10944  df-ltxr 10945  df-le 10946  df-sub 11137  df-neg 11138  df-div 11563  df-nn 11904  df-2 11966  df-3 11967  df-4 11968  df-n0 12164  df-z 12250  df-uz 12512  df-q 12618  df-rp 12660  df-xneg 12777  df-xadd 12778  df-xmul 12779  df-icc 13015  df-seq 13650  df-exp 13711  df-cj 14738  df-re 14739  df-im 14740  df-sqrt 14874  df-abs 14875  df-topgen 17071  df-psmet 20502  df-xmet 20503  df-met 20504  df-bl 20505  df-mopn 20506  df-top 21951  df-topon 21968  df-bases 22004  df-lm 22288  df-haus 22374  df-grpo 28756  df-gid 28757  df-ginv 28758  df-gdiv 28759  df-ablo 28808  df-vc 28822  df-nv 28855  df-va 28858  df-ba 28859  df-sm 28860  df-0v 28861  df-vs 28862  df-nmcv 28863  df-ims 28864  df-hnorm 29231  df-hvsub 29234  df-hlim 29235  df-sh 29470  df-ch 29484  df-ch0 29516  df-shs 29571  df-span 29572

This theorem is referenced by:  spanun  29808  spanunsni  29842  spansnji  29909