Theorem spanuni 29906

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 29698	. . . . . . 7 ⊢ (𝐴 ⊆ ℋ → (span‘𝐴) ∈ Sℋ )
3	1, 2	ax-mp 5	. . . . . 6 ⊢ (span‘𝐴) ∈ Sℋ
4		spanun.2	. . . . . . 7 ⊢ 𝐵 ⊆ ℋ
5		spancl 29698	. . . . . . 7 ⊢ (𝐵 ⊆ ℋ → (span‘𝐵) ∈ Sℋ )
6	4, 5	ax-mp 5	. . . . . 6 ⊢ (span‘𝐵) ∈ Sℋ
7	3, 6	shscli 29679	. . . . 5 ⊢ ((span‘𝐴) +ℋ (span‘𝐵)) ∈ Sℋ
8	7	shssii 29575	. . . 4 ⊢ ((span‘𝐴) +ℋ (span‘𝐵)) ⊆ ℋ
9		spanss2 29707	. . . . . . 7 ⊢ (𝐴 ⊆ ℋ → 𝐴 ⊆ (span‘𝐴))
10	1, 9	ax-mp 5	. . . . . 6 ⊢ 𝐴 ⊆ (span‘𝐴)
11		spanss2 29707	. . . . . . 7 ⊢ (𝐵 ⊆ ℋ → 𝐵 ⊆ (span‘𝐵))
12	4, 11	ax-mp 5	. . . . . 6 ⊢ 𝐵 ⊆ (span‘𝐵)
13		unss12 4116	. . . . . 6 ⊢ ((𝐴 ⊆ (span‘𝐴) ∧ 𝐵 ⊆ (span‘𝐵)) → (𝐴 ∪ 𝐵) ⊆ ((span‘𝐴) ∪ (span‘𝐵)))
14	10, 12, 13	mp2an 689	. . . . 5 ⊢ (𝐴 ∪ 𝐵) ⊆ ((span‘𝐴) ∪ (span‘𝐵))
15	3, 6	shunssi 29730	. . . . 5 ⊢ ((span‘𝐴) ∪ (span‘𝐵)) ⊆ ((span‘𝐴) +ℋ (span‘𝐵))
16	14, 15	sstri 3930	. . . 4 ⊢ (𝐴 ∪ 𝐵) ⊆ ((span‘𝐴) +ℋ (span‘𝐵))
17		spanss 29710	. . . 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 689	. . 3 ⊢ (span‘(𝐴 ∪ 𝐵)) ⊆ (span‘((span‘𝐴) +ℋ (span‘𝐵)))
19		spanid 29709	. . . 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 3957	. 2 ⊢ (span‘(𝐴 ∪ 𝐵)) ⊆ ((span‘𝐴) +ℋ (span‘𝐵))
22	3, 6	shseli 29678	. . . . 5 ⊢ (𝑥 ∈ ((span‘𝐴) +ℋ (span‘𝐵)) ↔ ∃𝑧 ∈ (span‘𝐴)∃𝑤 ∈ (span‘𝐵)𝑥 = (𝑧 +ℎ 𝑤))
23		r2ex 3232	. . . . 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 3436	. . . . . . . . . . 11 ⊢ 𝑧 ∈ V
26	25	elspani 29905	. . . . . . . . . 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 3436	. . . . . . . . . . 11 ⊢ 𝑤 ∈ V
29	28	elspani 29905	. . . . . . . . . 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 627	. . . . . . . 8 ⊢ ((𝑧 ∈ (span‘𝐴) ∧ 𝑤 ∈ (span‘𝐵)) ↔ (∀𝑦 ∈ Sℋ (𝐴 ⊆ 𝑦 → 𝑧 ∈ 𝑦) ∧ ∀𝑦 ∈ Sℋ (𝐵 ⊆ 𝑦 → 𝑤 ∈ 𝑦)))
32		r19.26 3095	. . . . . . . 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 3115	. . . . . . 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 581	. . . . . 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 4118	. . . . . . . . . . . 12 ⊢ ((𝐴 ⊆ 𝑦 ∧ 𝐵 ⊆ 𝑦) ↔ (𝐴 ∪ 𝐵) ⊆ 𝑦)
37		anim12 806	. . . . . . . . . . . 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 29579	. . . . . . . . . . . 12 ⊢ ((𝑦 ∈ Sℋ ∧ 𝑧 ∈ 𝑦 ∧ 𝑤 ∈ 𝑦) → (𝑧 +ℎ 𝑤) ∈ 𝑦)
40	39	3expib 1121	. . . . . . . . . . 11 ⊢ (𝑦 ∈ Sℋ → ((𝑧 ∈ 𝑦 ∧ 𝑤 ∈ 𝑦) → (𝑧 +ℎ 𝑤) ∈ 𝑦))
41	38, 40	sylan9r 509	. . . . . . . . . 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 508	. . . . . . . . 9 ⊢ (((𝑦 ∈ Sℋ ∧ ((𝐴 ⊆ 𝑦 → 𝑧 ∈ 𝑦) ∧ (𝐵 ⊆ 𝑦 → 𝑤 ∈ 𝑦))) ∧ 𝑥 = (𝑧 +ℎ 𝑤)) → ((𝐴 ∪ 𝐵) ⊆ 𝑦 → 𝑥 ∈ 𝑦))
45	44	expl 458	. . . . . . . 8 ⊢ (𝑦 ∈ Sℋ → ((((𝐴 ⊆ 𝑦 → 𝑧 ∈ 𝑦) ∧ (𝐵 ⊆ 𝑦 → 𝑤 ∈ 𝑦)) ∧ 𝑥 = (𝑧 +ℎ 𝑤)) → ((𝐴 ∪ 𝐵) ⊆ 𝑦 → 𝑥 ∈ 𝑦)))
46	45	ralimia 3085	. . . . . . 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 4119	. . . . . . . 8 ⊢ (𝐴 ∪ 𝐵) ⊆ ℋ
48		vex 3436	. . . . . . . . 9 ⊢ 𝑥 ∈ V
49	48	elspani 29905	. . . . . . . 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 1935	. . . 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 3925	. 2 ⊢ ((span‘𝐴) +ℋ (span‘𝐵)) ⊆ (span‘(𝐴 ∪ 𝐵))
56	21, 55	eqssi 3937	1 ⊢ (span‘(𝐴 ∪ 𝐵)) = ((span‘𝐴) +ℋ (span‘𝐵))

Syntax hints:   → wi 4   ↔ wb 205   ∧ wa 396   = wceq 1539  ∃wex 1782   ∈ wcel 2106  ∀wral 3064  ∃wrex 3065   ∪ cun 3885   ⊆ wss 3887  ‘cfv 6433  (class class class)co 7275   ℋchba 29281   +_ℎ cva 29282   S_ℋ csh 29290   +_ℋ cph 29293  spancspn 29294

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1798  ax-4 1812  ax-5 1913  ax-6 1971  ax-7 2011  ax-8 2108  ax-9 2116  ax-10 2137  ax-11 2154  ax-12 2171  ax-ext 2709  ax-rep 5209  ax-sep 5223  ax-nul 5230  ax-pow 5288  ax-pr 5352  ax-un 7588  ax-cnex 10927  ax-resscn 10928  ax-1cn 10929  ax-icn 10930  ax-addcl 10931  ax-addrcl 10932  ax-mulcl 10933  ax-mulrcl 10934  ax-mulcom 10935  ax-addass 10936  ax-mulass 10937  ax-distr 10938  ax-i2m1 10939  ax-1ne0 10940  ax-1rid 10941  ax-rnegex 10942  ax-rrecex 10943  ax-cnre 10944  ax-pre-lttri 10945  ax-pre-lttrn 10946  ax-pre-ltadd 10947  ax-pre-mulgt0 10948  ax-pre-sup 10949  ax-addf 10950  ax-mulf 10951  ax-hilex 29361  ax-hfvadd 29362  ax-hvcom 29363  ax-hvass 29364  ax-hv0cl 29365  ax-hvaddid 29366  ax-hfvmul 29367  ax-hvmulid 29368  ax-hvmulass 29369  ax-hvdistr1 29370  ax-hvdistr2 29371  ax-hvmul0 29372  ax-hfi 29441  ax-his1 29444  ax-his2 29445  ax-his3 29446  ax-his4 29447

This theorem depends on definitions:  df-bi 206  df-an 397  df-or 845  df-3or 1087  df-3an 1088  df-tru 1542  df-fal 1552  df-ex 1783  df-nf 1787  df-sb 2068  df-mo 2540  df-eu 2569  df-clab 2716  df-cleq 2730  df-clel 2816  df-nfc 2889  df-ne 2944  df-nel 3050  df-ral 3069  df-rex 3070  df-rmo 3071  df-reu 3072  df-rab 3073  df-v 3434  df-sbc 3717  df-csb 3833  df-dif 3890  df-un 3892  df-in 3894  df-ss 3904  df-pss 3906  df-nul 4257  df-if 4460  df-pw 4535  df-sn 4562  df-pr 4564  df-op 4568  df-uni 4840  df-int 4880  df-iun 4926  df-br 5075  df-opab 5137  df-mpt 5158  df-tr 5192  df-id 5489  df-eprel 5495  df-po 5503  df-so 5504  df-fr 5544  df-we 5546  df-xp 5595  df-rel 5596  df-cnv 5597  df-co 5598  df-dm 5599  df-rn 5600  df-res 5601  df-ima 5602  df-pred 6202  df-ord 6269  df-on 6270  df-lim 6271  df-suc 6272  df-iota 6391  df-fun 6435  df-fn 6436  df-f 6437  df-f1 6438  df-fo 6439  df-f1o 6440  df-fv 6441  df-riota 7232  df-ov 7278  df-oprab 7279  df-mpo 7280  df-om 7713  df-1st 7831  df-2nd 7832  df-frecs 8097  df-wrecs 8128  df-recs 8202  df-rdg 8241  df-er 8498  df-map 8617  df-pm 8618  df-en 8734  df-dom 8735  df-sdom 8736  df-sup 9201  df-inf 9202  df-pnf 11011  df-mnf 11012  df-xr 11013  df-ltxr 11014  df-le 11015  df-sub 11207  df-neg 11208  df-div 11633  df-nn 11974  df-2 12036  df-3 12037  df-4 12038  df-n0 12234  df-z 12320  df-uz 12583  df-q 12689  df-rp 12731  df-xneg 12848  df-xadd 12849  df-xmul 12850  df-icc 13086  df-seq 13722  df-exp 13783  df-cj 14810  df-re 14811  df-im 14812  df-sqrt 14946  df-abs 14947  df-topgen 17154  df-psmet 20589  df-xmet 20590  df-met 20591  df-bl 20592  df-mopn 20593  df-top 22043  df-topon 22060  df-bases 22096  df-lm 22380  df-haus 22466  df-grpo 28855  df-gid 28856  df-ginv 28857  df-gdiv 28858  df-ablo 28907  df-vc 28921  df-nv 28954  df-va 28957  df-ba 28958  df-sm 28959  df-0v 28960  df-vs 28961  df-nmcv 28962  df-ims 28963  df-hnorm 29330  df-hvsub 29333  df-hlim 29334  df-sh 29569  df-ch 29583  df-ch0 29615  df-shs 29670  df-span 29671

This theorem is referenced by:  spanun  29907  spanunsni  29941  spansnji  30008