Theorem spanuni 29323

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 29115	. . . . . . 7 ⊢ (𝐴 ⊆ ℋ → (span‘𝐴) ∈ Sℋ )
3	1, 2	ax-mp 5	. . . . . 6 ⊢ (span‘𝐴) ∈ Sℋ
4		spanun.2	. . . . . . 7 ⊢ 𝐵 ⊆ ℋ
5		spancl 29115	. . . . . . 7 ⊢ (𝐵 ⊆ ℋ → (span‘𝐵) ∈ Sℋ )
6	4, 5	ax-mp 5	. . . . . 6 ⊢ (span‘𝐵) ∈ Sℋ
7	3, 6	shscli 29096	. . . . 5 ⊢ ((span‘𝐴) +ℋ (span‘𝐵)) ∈ Sℋ
8	7	shssii 28992	. . . 4 ⊢ ((span‘𝐴) +ℋ (span‘𝐵)) ⊆ ℋ
9		spanss2 29124	. . . . . . 7 ⊢ (𝐴 ⊆ ℋ → 𝐴 ⊆ (span‘𝐴))
10	1, 9	ax-mp 5	. . . . . 6 ⊢ 𝐴 ⊆ (span‘𝐴)
11		spanss2 29124	. . . . . . 7 ⊢ (𝐵 ⊆ ℋ → 𝐵 ⊆ (span‘𝐵))
12	4, 11	ax-mp 5	. . . . . 6 ⊢ 𝐵 ⊆ (span‘𝐵)
13		unss12 4160	. . . . . 6 ⊢ ((𝐴 ⊆ (span‘𝐴) ∧ 𝐵 ⊆ (span‘𝐵)) → (𝐴 ∪ 𝐵) ⊆ ((span‘𝐴) ∪ (span‘𝐵)))
14	10, 12, 13	mp2an 690	. . . . 5 ⊢ (𝐴 ∪ 𝐵) ⊆ ((span‘𝐴) ∪ (span‘𝐵))
15	3, 6	shunssi 29147	. . . . 5 ⊢ ((span‘𝐴) ∪ (span‘𝐵)) ⊆ ((span‘𝐴) +ℋ (span‘𝐵))
16	14, 15	sstri 3978	. . . 4 ⊢ (𝐴 ∪ 𝐵) ⊆ ((span‘𝐴) +ℋ (span‘𝐵))
17		spanss 29127	. . . 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 690	. . 3 ⊢ (span‘(𝐴 ∪ 𝐵)) ⊆ (span‘((span‘𝐴) +ℋ (span‘𝐵)))
19		spanid 29126	. . . 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 4005	. 2 ⊢ (span‘(𝐴 ∪ 𝐵)) ⊆ ((span‘𝐴) +ℋ (span‘𝐵))
22	3, 6	shseli 29095	. . . . 5 ⊢ (𝑥 ∈ ((span‘𝐴) +ℋ (span‘𝐵)) ↔ ∃𝑧 ∈ (span‘𝐴)∃𝑤 ∈ (span‘𝐵)𝑥 = (𝑧 +ℎ 𝑤))
23		r2ex 3305	. . . . 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 277	. . . 4 ⊢ (𝑥 ∈ ((span‘𝐴) +ℋ (span‘𝐵)) ↔ ∃𝑧∃𝑤((𝑧 ∈ (span‘𝐴) ∧ 𝑤 ∈ (span‘𝐵)) ∧ 𝑥 = (𝑧 +ℎ 𝑤)))
25		vex 3499	. . . . . . . . . . 11 ⊢ 𝑧 ∈ V
26	25	elspani 29322	. . . . . . . . . 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 3499	. . . . . . . . . . 11 ⊢ 𝑤 ∈ V
29	28	elspani 29322	. . . . . . . . . 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 628	. . . . . . . 8 ⊢ ((𝑧 ∈ (span‘𝐴) ∧ 𝑤 ∈ (span‘𝐵)) ↔ (∀𝑦 ∈ Sℋ (𝐴 ⊆ 𝑦 → 𝑧 ∈ 𝑦) ∧ ∀𝑦 ∈ Sℋ (𝐵 ⊆ 𝑦 → 𝑤 ∈ 𝑦)))
32		r19.26 3172	. . . . . . . 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 280	. . . . . . 7 ⊢ ((𝑧 ∈ (span‘𝐴) ∧ 𝑤 ∈ (span‘𝐵)) ↔ ∀𝑦 ∈ Sℋ ((𝐴 ⊆ 𝑦 → 𝑧 ∈ 𝑦) ∧ (𝐵 ⊆ 𝑦 → 𝑤 ∈ 𝑦)))
34		r19.27v 3186	. . . . . . 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 583	. . . . . 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 4162	. . . . . . . . . . . 12 ⊢ ((𝐴 ⊆ 𝑦 ∧ 𝐵 ⊆ 𝑦) ↔ (𝐴 ∪ 𝐵) ⊆ 𝑦)
37		anim12 807	. . . . . . . . . . . 12 ⊢ (((𝐴 ⊆ 𝑦 → 𝑧 ∈ 𝑦) ∧ (𝐵 ⊆ 𝑦 → 𝑤 ∈ 𝑦)) → ((𝐴 ⊆ 𝑦 ∧ 𝐵 ⊆ 𝑦) → (𝑧 ∈ 𝑦 ∧ 𝑤 ∈ 𝑦)))
38	36, 37	syl5bir 245	. . . . . . . . . . 11 ⊢ (((𝐴 ⊆ 𝑦 → 𝑧 ∈ 𝑦) ∧ (𝐵 ⊆ 𝑦 → 𝑤 ∈ 𝑦)) → ((𝐴 ∪ 𝐵) ⊆ 𝑦 → (𝑧 ∈ 𝑦 ∧ 𝑤 ∈ 𝑦)))
39		shaddcl 28996	. . . . . . . . . . . 12 ⊢ ((𝑦 ∈ Sℋ ∧ 𝑧 ∈ 𝑦 ∧ 𝑤 ∈ 𝑦) → (𝑧 +ℎ 𝑤) ∈ 𝑦)
40	39	3expib 1118	. . . . . . . . . . 11 ⊢ (𝑦 ∈ Sℋ → ((𝑧 ∈ 𝑦 ∧ 𝑤 ∈ 𝑦) → (𝑧 +ℎ 𝑤) ∈ 𝑦))
41	38, 40	sylan9r 511	. . . . . . . . . 10 ⊢ ((𝑦 ∈ Sℋ ∧ ((𝐴 ⊆ 𝑦 → 𝑧 ∈ 𝑦) ∧ (𝐵 ⊆ 𝑦 → 𝑤 ∈ 𝑦))) → ((𝐴 ∪ 𝐵) ⊆ 𝑦 → (𝑧 +ℎ 𝑤) ∈ 𝑦))
42		eleq1 2902	. . . . . . . . . . 11 ⊢ (𝑥 = (𝑧 +ℎ 𝑤) → (𝑥 ∈ 𝑦 ↔ (𝑧 +ℎ 𝑤) ∈ 𝑦))
43	42	biimprd 250	. . . . . . . . . 10 ⊢ (𝑥 = (𝑧 +ℎ 𝑤) → ((𝑧 +ℎ 𝑤) ∈ 𝑦 → 𝑥 ∈ 𝑦))
44	41, 43	sylan9 510	. . . . . . . . 9 ⊢ (((𝑦 ∈ Sℋ ∧ ((𝐴 ⊆ 𝑦 → 𝑧 ∈ 𝑦) ∧ (𝐵 ⊆ 𝑦 → 𝑤 ∈ 𝑦))) ∧ 𝑥 = (𝑧 +ℎ 𝑤)) → ((𝐴 ∪ 𝐵) ⊆ 𝑦 → 𝑥 ∈ 𝑦))
45	44	expl 460	. . . . . . . 8 ⊢ (𝑦 ∈ Sℋ → ((((𝐴 ⊆ 𝑦 → 𝑧 ∈ 𝑦) ∧ (𝐵 ⊆ 𝑦 → 𝑤 ∈ 𝑦)) ∧ 𝑥 = (𝑧 +ℎ 𝑤)) → ((𝐴 ∪ 𝐵) ⊆ 𝑦 → 𝑥 ∈ 𝑦)))
46	45	ralimia 3160	. . . . . . 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 4163	. . . . . . . 8 ⊢ (𝐴 ∪ 𝐵) ⊆ ℋ
48		vex 3499	. . . . . . . . 9 ⊢ 𝑥 ∈ V
49	48	elspani 29322	. . . . . . . 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 236	. . . . . 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 1933	. . . 4 ⊢ (∃𝑧∃𝑤((𝑧 ∈ (span‘𝐴) ∧ 𝑤 ∈ (span‘𝐵)) ∧ 𝑥 = (𝑧 +ℎ 𝑤)) → 𝑥 ∈ (span‘(𝐴 ∪ 𝐵)))
54	24, 53	sylbi 219	. . 3 ⊢ (𝑥 ∈ ((span‘𝐴) +ℋ (span‘𝐵)) → 𝑥 ∈ (span‘(𝐴 ∪ 𝐵)))
55	54	ssriv 3973	. 2 ⊢ ((span‘𝐴) +ℋ (span‘𝐵)) ⊆ (span‘(𝐴 ∪ 𝐵))
56	21, 55	eqssi 3985	1 ⊢ (span‘(𝐴 ∪ 𝐵)) = ((span‘𝐴) +ℋ (span‘𝐵))

Syntax hints:   → wi 4   ↔ wb 208   ∧ wa 398   = wceq 1537  ∃wex 1780   ∈ wcel 2114  ∀wral 3140  ∃wrex 3141   ∪ cun 3936   ⊆ wss 3938  ‘cfv 6357  (class class class)co 7158   ℋchba 28698   +_ℎ cva 28699   S_ℋ csh 28707   +_ℋ cph 28710  spancspn 28711

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2116  ax-9 2124  ax-10 2145  ax-11 2161  ax-12 2177  ax-ext 2795  ax-rep 5192  ax-sep 5205  ax-nul 5212  ax-pow 5268  ax-pr 5332  ax-un 7463  ax-cnex 10595  ax-resscn 10596  ax-1cn 10597  ax-icn 10598  ax-addcl 10599  ax-addrcl 10600  ax-mulcl 10601  ax-mulrcl 10602  ax-mulcom 10603  ax-addass 10604  ax-mulass 10605  ax-distr 10606  ax-i2m1 10607  ax-1ne0 10608  ax-1rid 10609  ax-rnegex 10610  ax-rrecex 10611  ax-cnre 10612  ax-pre-lttri 10613  ax-pre-lttrn 10614  ax-pre-ltadd 10615  ax-pre-mulgt0 10616  ax-pre-sup 10617  ax-addf 10618  ax-mulf 10619  ax-hilex 28778  ax-hfvadd 28779  ax-hvcom 28780  ax-hvass 28781  ax-hv0cl 28782  ax-hvaddid 28783  ax-hfvmul 28784  ax-hvmulid 28785  ax-hvmulass 28786  ax-hvdistr1 28787  ax-hvdistr2 28788  ax-hvmul0 28789  ax-hfi 28858  ax-his1 28861  ax-his2 28862  ax-his3 28863  ax-his4 28864

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3or 1084  df-3an 1085  df-tru 1540  df-ex 1781  df-nf 1785  df-sb 2070  df-mo 2622  df-eu 2654  df-clab 2802  df-cleq 2816  df-clel 2895  df-nfc 2965  df-ne 3019  df-nel 3126  df-ral 3145  df-rex 3146  df-reu 3147  df-rmo 3148  df-rab 3149  df-v 3498  df-sbc 3775  df-csb 3886  df-dif 3941  df-un 3943  df-in 3945  df-ss 3954  df-pss 3956  df-nul 4294  df-if 4470  df-pw 4543  df-sn 4570  df-pr 4572  df-tp 4574  df-op 4576  df-uni 4841  df-int 4879  df-iun 4923  df-br 5069  df-opab 5131  df-mpt 5149  df-tr 5175  df-id 5462  df-eprel 5467  df-po 5476  df-so 5477  df-fr 5516  df-we 5518  df-xp 5563  df-rel 5564  df-cnv 5565  df-co 5566  df-dm 5567  df-rn 5568  df-res 5569  df-ima 5570  df-pred 6150  df-ord 6196  df-on 6197  df-lim 6198  df-suc 6199  df-iota 6316  df-fun 6359  df-fn 6360  df-f 6361  df-f1 6362  df-fo 6363  df-f1o 6364  df-fv 6365  df-riota 7116  df-ov 7161  df-oprab 7162  df-mpo 7163  df-om 7583  df-1st 7691  df-2nd 7692  df-wrecs 7949  df-recs 8010  df-rdg 8048  df-er 8291  df-map 8410  df-pm 8411  df-en 8512  df-dom 8513  df-sdom 8514  df-sup 8908  df-inf 8909  df-pnf 10679  df-mnf 10680  df-xr 10681  df-ltxr 10682  df-le 10683  df-sub 10874  df-neg 10875  df-div 11300  df-nn 11641  df-2 11703  df-3 11704  df-4 11705  df-n0 11901  df-z 11985  df-uz 12247  df-q 12352  df-rp 12393  df-xneg 12510  df-xadd 12511  df-xmul 12512  df-icc 12748  df-seq 13373  df-exp 13433  df-cj 14460  df-re 14461  df-im 14462  df-sqrt 14596  df-abs 14597  df-topgen 16719  df-psmet 20539  df-xmet 20540  df-met 20541  df-bl 20542  df-mopn 20543  df-top 21504  df-topon 21521  df-bases 21556  df-lm 21839  df-haus 21925  df-grpo 28272  df-gid 28273  df-ginv 28274  df-gdiv 28275  df-ablo 28324  df-vc 28338  df-nv 28371  df-va 28374  df-ba 28375  df-sm 28376  df-0v 28377  df-vs 28378  df-nmcv 28379  df-ims 28380  df-hnorm 28747  df-hvsub 28750  df-hlim 28751  df-sh 28986  df-ch 29000  df-ch0 29032  df-shs 29087  df-span 29088

This theorem is referenced by:  spanun  29324  spanunsni  29358  spansnji  29425