Theorem spanuni 29625

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 29417	. . . . . . 7 ⊢ (𝐴 ⊆ ℋ → (span‘𝐴) ∈ Sℋ )
3	1, 2	ax-mp 5	. . . . . 6 ⊢ (span‘𝐴) ∈ Sℋ
4		spanun.2	. . . . . . 7 ⊢ 𝐵 ⊆ ℋ
5		spancl 29417	. . . . . . 7 ⊢ (𝐵 ⊆ ℋ → (span‘𝐵) ∈ Sℋ )
6	4, 5	ax-mp 5	. . . . . 6 ⊢ (span‘𝐵) ∈ Sℋ
7	3, 6	shscli 29398	. . . . 5 ⊢ ((span‘𝐴) +ℋ (span‘𝐵)) ∈ Sℋ
8	7	shssii 29294	. . . 4 ⊢ ((span‘𝐴) +ℋ (span‘𝐵)) ⊆ ℋ
9		spanss2 29426	. . . . . . 7 ⊢ (𝐴 ⊆ ℋ → 𝐴 ⊆ (span‘𝐴))
10	1, 9	ax-mp 5	. . . . . 6 ⊢ 𝐴 ⊆ (span‘𝐴)
11		spanss2 29426	. . . . . . 7 ⊢ (𝐵 ⊆ ℋ → 𝐵 ⊆ (span‘𝐵))
12	4, 11	ax-mp 5	. . . . . 6 ⊢ 𝐵 ⊆ (span‘𝐵)
13		unss12 4096	. . . . . 6 ⊢ ((𝐴 ⊆ (span‘𝐴) ∧ 𝐵 ⊆ (span‘𝐵)) → (𝐴 ∪ 𝐵) ⊆ ((span‘𝐴) ∪ (span‘𝐵)))
14	10, 12, 13	mp2an 692	. . . . 5 ⊢ (𝐴 ∪ 𝐵) ⊆ ((span‘𝐴) ∪ (span‘𝐵))
15	3, 6	shunssi 29449	. . . . 5 ⊢ ((span‘𝐴) ∪ (span‘𝐵)) ⊆ ((span‘𝐴) +ℋ (span‘𝐵))
16	14, 15	sstri 3910	. . . 4 ⊢ (𝐴 ∪ 𝐵) ⊆ ((span‘𝐴) +ℋ (span‘𝐵))
17		spanss 29429	. . . 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 692	. . 3 ⊢ (span‘(𝐴 ∪ 𝐵)) ⊆ (span‘((span‘𝐴) +ℋ (span‘𝐵)))
19		spanid 29428	. . . 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 3937	. 2 ⊢ (span‘(𝐴 ∪ 𝐵)) ⊆ ((span‘𝐴) +ℋ (span‘𝐵))
22	3, 6	shseli 29397	. . . . 5 ⊢ (𝑥 ∈ ((span‘𝐴) +ℋ (span‘𝐵)) ↔ ∃𝑧 ∈ (span‘𝐴)∃𝑤 ∈ (span‘𝐵)𝑥 = (𝑧 +ℎ 𝑤))
23		r2ex 3222	. . . . 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 278	. . . 4 ⊢ (𝑥 ∈ ((span‘𝐴) +ℋ (span‘𝐵)) ↔ ∃𝑧∃𝑤((𝑧 ∈ (span‘𝐴) ∧ 𝑤 ∈ (span‘𝐵)) ∧ 𝑥 = (𝑧 +ℎ 𝑤)))
25		vex 3412	. . . . . . . . . . 11 ⊢ 𝑧 ∈ V
26	25	elspani 29624	. . . . . . . . . 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 3412	. . . . . . . . . . 11 ⊢ 𝑤 ∈ V
29	28	elspani 29624	. . . . . . . . . 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 630	. . . . . . . 8 ⊢ ((𝑧 ∈ (span‘𝐴) ∧ 𝑤 ∈ (span‘𝐵)) ↔ (∀𝑦 ∈ Sℋ (𝐴 ⊆ 𝑦 → 𝑧 ∈ 𝑦) ∧ ∀𝑦 ∈ Sℋ (𝐵 ⊆ 𝑦 → 𝑤 ∈ 𝑦)))
32		r19.26 3092	. . . . . . . 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 281	. . . . . . 7 ⊢ ((𝑧 ∈ (span‘𝐴) ∧ 𝑤 ∈ (span‘𝐵)) ↔ ∀𝑦 ∈ Sℋ ((𝐴 ⊆ 𝑦 → 𝑧 ∈ 𝑦) ∧ (𝐵 ⊆ 𝑦 → 𝑤 ∈ 𝑦)))
34		r19.27v 3107	. . . . . . 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 584	. . . . . 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 4098	. . . . . . . . . . . 12 ⊢ ((𝐴 ⊆ 𝑦 ∧ 𝐵 ⊆ 𝑦) ↔ (𝐴 ∪ 𝐵) ⊆ 𝑦)
37		anim12 809	. . . . . . . . . . . 12 ⊢ (((𝐴 ⊆ 𝑦 → 𝑧 ∈ 𝑦) ∧ (𝐵 ⊆ 𝑦 → 𝑤 ∈ 𝑦)) → ((𝐴 ⊆ 𝑦 ∧ 𝐵 ⊆ 𝑦) → (𝑧 ∈ 𝑦 ∧ 𝑤 ∈ 𝑦)))
38	36, 37	syl5bir 246	. . . . . . . . . . 11 ⊢ (((𝐴 ⊆ 𝑦 → 𝑧 ∈ 𝑦) ∧ (𝐵 ⊆ 𝑦 → 𝑤 ∈ 𝑦)) → ((𝐴 ∪ 𝐵) ⊆ 𝑦 → (𝑧 ∈ 𝑦 ∧ 𝑤 ∈ 𝑦)))
39		shaddcl 29298	. . . . . . . . . . . 12 ⊢ ((𝑦 ∈ Sℋ ∧ 𝑧 ∈ 𝑦 ∧ 𝑤 ∈ 𝑦) → (𝑧 +ℎ 𝑤) ∈ 𝑦)
40	39	3expib 1124	. . . . . . . . . . 11 ⊢ (𝑦 ∈ Sℋ → ((𝑧 ∈ 𝑦 ∧ 𝑤 ∈ 𝑦) → (𝑧 +ℎ 𝑤) ∈ 𝑦))
41	38, 40	sylan9r 512	. . . . . . . . . 10 ⊢ ((𝑦 ∈ Sℋ ∧ ((𝐴 ⊆ 𝑦 → 𝑧 ∈ 𝑦) ∧ (𝐵 ⊆ 𝑦 → 𝑤 ∈ 𝑦))) → ((𝐴 ∪ 𝐵) ⊆ 𝑦 → (𝑧 +ℎ 𝑤) ∈ 𝑦))
42		eleq1 2825	. . . . . . . . . . 11 ⊢ (𝑥 = (𝑧 +ℎ 𝑤) → (𝑥 ∈ 𝑦 ↔ (𝑧 +ℎ 𝑤) ∈ 𝑦))
43	42	biimprd 251	. . . . . . . . . 10 ⊢ (𝑥 = (𝑧 +ℎ 𝑤) → ((𝑧 +ℎ 𝑤) ∈ 𝑦 → 𝑥 ∈ 𝑦))
44	41, 43	sylan9 511	. . . . . . . . 9 ⊢ (((𝑦 ∈ Sℋ ∧ ((𝐴 ⊆ 𝑦 → 𝑧 ∈ 𝑦) ∧ (𝐵 ⊆ 𝑦 → 𝑤 ∈ 𝑦))) ∧ 𝑥 = (𝑧 +ℎ 𝑤)) → ((𝐴 ∪ 𝐵) ⊆ 𝑦 → 𝑥 ∈ 𝑦))
45	44	expl 461	. . . . . . . 8 ⊢ (𝑦 ∈ Sℋ → ((((𝐴 ⊆ 𝑦 → 𝑧 ∈ 𝑦) ∧ (𝐵 ⊆ 𝑦 → 𝑤 ∈ 𝑦)) ∧ 𝑥 = (𝑧 +ℎ 𝑤)) → ((𝐴 ∪ 𝐵) ⊆ 𝑦 → 𝑥 ∈ 𝑦)))
46	45	ralimia 3081	. . . . . . 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 4099	. . . . . . . 8 ⊢ (𝐴 ∪ 𝐵) ⊆ ℋ
48		vex 3412	. . . . . . . . 9 ⊢ 𝑥 ∈ V
49	48	elspani 29624	. . . . . . . 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 237	. . . . . 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 1940	. . . 4 ⊢ (∃𝑧∃𝑤((𝑧 ∈ (span‘𝐴) ∧ 𝑤 ∈ (span‘𝐵)) ∧ 𝑥 = (𝑧 +ℎ 𝑤)) → 𝑥 ∈ (span‘(𝐴 ∪ 𝐵)))
54	24, 53	sylbi 220	. . 3 ⊢ (𝑥 ∈ ((span‘𝐴) +ℋ (span‘𝐵)) → 𝑥 ∈ (span‘(𝐴 ∪ 𝐵)))
55	54	ssriv 3905	. 2 ⊢ ((span‘𝐴) +ℋ (span‘𝐵)) ⊆ (span‘(𝐴 ∪ 𝐵))
56	21, 55	eqssi 3917	1 ⊢ (span‘(𝐴 ∪ 𝐵)) = ((span‘𝐴) +ℋ (span‘𝐵))

Syntax hints:   → wi 4   ↔ wb 209   ∧ wa 399   = wceq 1543  ∃wex 1787   ∈ wcel 2110  ∀wral 3061  ∃wrex 3062   ∪ cun 3864   ⊆ wss 3866  ‘cfv 6380  (class class class)co 7213   ℋchba 29000   +_ℎ cva 29001   S_ℋ csh 29009   +_ℋ cph 29012  spancspn 29013

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1803  ax-4 1817  ax-5 1918  ax-6 1976  ax-7 2016  ax-8 2112  ax-9 2120  ax-10 2141  ax-11 2158  ax-12 2175  ax-ext 2708  ax-rep 5179  ax-sep 5192  ax-nul 5199  ax-pow 5258  ax-pr 5322  ax-un 7523  ax-cnex 10785  ax-resscn 10786  ax-1cn 10787  ax-icn 10788  ax-addcl 10789  ax-addrcl 10790  ax-mulcl 10791  ax-mulrcl 10792  ax-mulcom 10793  ax-addass 10794  ax-mulass 10795  ax-distr 10796  ax-i2m1 10797  ax-1ne0 10798  ax-1rid 10799  ax-rnegex 10800  ax-rrecex 10801  ax-cnre 10802  ax-pre-lttri 10803  ax-pre-lttrn 10804  ax-pre-ltadd 10805  ax-pre-mulgt0 10806  ax-pre-sup 10807  ax-addf 10808  ax-mulf 10809  ax-hilex 29080  ax-hfvadd 29081  ax-hvcom 29082  ax-hvass 29083  ax-hv0cl 29084  ax-hvaddid 29085  ax-hfvmul 29086  ax-hvmulid 29087  ax-hvmulass 29088  ax-hvdistr1 29089  ax-hvdistr2 29090  ax-hvmul0 29091  ax-hfi 29160  ax-his1 29163  ax-his2 29164  ax-his3 29165  ax-his4 29166

This theorem depends on definitions:  df-bi 210  df-an 400  df-or 848  df-3or 1090  df-3an 1091  df-tru 1546  df-fal 1556  df-ex 1788  df-nf 1792  df-sb 2071  df-mo 2539  df-eu 2568  df-clab 2715  df-cleq 2729  df-clel 2816  df-nfc 2886  df-ne 2941  df-nel 3047  df-ral 3066  df-rex 3067  df-reu 3068  df-rmo 3069  df-rab 3070  df-v 3410  df-sbc 3695  df-csb 3812  df-dif 3869  df-un 3871  df-in 3873  df-ss 3883  df-pss 3885  df-nul 4238  df-if 4440  df-pw 4515  df-sn 4542  df-pr 4544  df-tp 4546  df-op 4548  df-uni 4820  df-int 4860  df-iun 4906  df-br 5054  df-opab 5116  df-mpt 5136  df-tr 5162  df-id 5455  df-eprel 5460  df-po 5468  df-so 5469  df-fr 5509  df-we 5511  df-xp 5557  df-rel 5558  df-cnv 5559  df-co 5560  df-dm 5561  df-rn 5562  df-res 5563  df-ima 5564  df-pred 6160  df-ord 6216  df-on 6217  df-lim 6218  df-suc 6219  df-iota 6338  df-fun 6382  df-fn 6383  df-f 6384  df-f1 6385  df-fo 6386  df-f1o 6387  df-fv 6388  df-riota 7170  df-ov 7216  df-oprab 7217  df-mpo 7218  df-om 7645  df-1st 7761  df-2nd 7762  df-wrecs 8047  df-recs 8108  df-rdg 8146  df-er 8391  df-map 8510  df-pm 8511  df-en 8627  df-dom 8628  df-sdom 8629  df-sup 9058  df-inf 9059  df-pnf 10869  df-mnf 10870  df-xr 10871  df-ltxr 10872  df-le 10873  df-sub 11064  df-neg 11065  df-div 11490  df-nn 11831  df-2 11893  df-3 11894  df-4 11895  df-n0 12091  df-z 12177  df-uz 12439  df-q 12545  df-rp 12587  df-xneg 12704  df-xadd 12705  df-xmul 12706  df-icc 12942  df-seq 13575  df-exp 13636  df-cj 14662  df-re 14663  df-im 14664  df-sqrt 14798  df-abs 14799  df-topgen 16948  df-psmet 20355  df-xmet 20356  df-met 20357  df-bl 20358  df-mopn 20359  df-top 21791  df-topon 21808  df-bases 21843  df-lm 22126  df-haus 22212  df-grpo 28574  df-gid 28575  df-ginv 28576  df-gdiv 28577  df-ablo 28626  df-vc 28640  df-nv 28673  df-va 28676  df-ba 28677  df-sm 28678  df-0v 28679  df-vs 28680  df-nmcv 28681  df-ims 28682  df-hnorm 29049  df-hvsub 29052  df-hlim 29053  df-sh 29288  df-ch 29302  df-ch0 29334  df-shs 29389  df-span 29390

This theorem is referenced by:  spanun  29626  spanunsni  29660  spansnji  29727