Theorem lnocoi 27612

Description: The composition of two linear operators is linear. (Contributed by NM, 12-Jan-2008.) (Revised by Mario Carneiro, 19-Nov-2013.) (New usage is discouraged.)

Hypotheses

Ref	Expression
lnocoi.l	⊢ 𝐿 = (𝑈 LnOp 𝑊)
lnocoi.m	⊢ 𝑀 = (𝑊 LnOp 𝑋)
lnocoi.n	⊢ 𝑁 = (𝑈 LnOp 𝑋)
lnocoi.u	⊢ 𝑈 ∈ NrmCVec
lnocoi.w	⊢ 𝑊 ∈ NrmCVec
lnocoi.x	⊢ 𝑋 ∈ NrmCVec
lnocoi.s	⊢ 𝑆 ∈ 𝐿
lnocoi.t	⊢ 𝑇 ∈ 𝑀

Assertion

Ref	Expression
lnocoi	⊢ (𝑇 ∘ 𝑆) ∈ 𝑁

Proof of Theorem lnocoi

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

Step	Hyp	Ref	Expression
1		lnocoi.w	. . . 4 ⊢ 𝑊 ∈ NrmCVec
2		lnocoi.x	. . . 4 ⊢ 𝑋 ∈ NrmCVec
3		lnocoi.t	. . . 4 ⊢ 𝑇 ∈ 𝑀
4		eqid 2622	. . . . 5 ⊢ (BaseSet‘𝑊) = (BaseSet‘𝑊)
5		eqid 2622	. . . . 5 ⊢ (BaseSet‘𝑋) = (BaseSet‘𝑋)
6		lnocoi.m	. . . . 5 ⊢ 𝑀 = (𝑊 LnOp 𝑋)
7	4, 5, 6	lnof 27610	. . . 4 ⊢ ((𝑊 ∈ NrmCVec ∧ 𝑋 ∈ NrmCVec ∧ 𝑇 ∈ 𝑀) → 𝑇:(BaseSet‘𝑊)⟶(BaseSet‘𝑋))
8	1, 2, 3, 7	mp3an 1424	. . 3 ⊢ 𝑇:(BaseSet‘𝑊)⟶(BaseSet‘𝑋)
9		lnocoi.u	. . . 4 ⊢ 𝑈 ∈ NrmCVec
10		lnocoi.s	. . . 4 ⊢ 𝑆 ∈ 𝐿
11		eqid 2622	. . . . 5 ⊢ (BaseSet‘𝑈) = (BaseSet‘𝑈)
12		lnocoi.l	. . . . 5 ⊢ 𝐿 = (𝑈 LnOp 𝑊)
13	11, 4, 12	lnof 27610	. . . 4 ⊢ ((𝑈 ∈ NrmCVec ∧ 𝑊 ∈ NrmCVec ∧ 𝑆 ∈ 𝐿) → 𝑆:(BaseSet‘𝑈)⟶(BaseSet‘𝑊))
14	9, 1, 10, 13	mp3an 1424	. . 3 ⊢ 𝑆:(BaseSet‘𝑈)⟶(BaseSet‘𝑊)
15		fco 6058	. . 3 ⊢ ((𝑇:(BaseSet‘𝑊)⟶(BaseSet‘𝑋) ∧ 𝑆:(BaseSet‘𝑈)⟶(BaseSet‘𝑊)) → (𝑇 ∘ 𝑆):(BaseSet‘𝑈)⟶(BaseSet‘𝑋))
16	8, 14, 15	mp2an 708	. 2 ⊢ (𝑇 ∘ 𝑆):(BaseSet‘𝑈)⟶(BaseSet‘𝑋)
17		eqid 2622	. . . . . . . 8 ⊢ ( ·𝑠OLD ‘𝑈) = ( ·𝑠OLD ‘𝑈)
18	11, 17	nvscl 27481	. . . . . . 7 ⊢ ((𝑈 ∈ NrmCVec ∧ 𝑥 ∈ ℂ ∧ 𝑦 ∈ (BaseSet‘𝑈)) → (𝑥( ·𝑠OLD ‘𝑈)𝑦) ∈ (BaseSet‘𝑈))
19	9, 18	mp3an1 1411	. . . . . 6 ⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ (BaseSet‘𝑈)) → (𝑥( ·𝑠OLD ‘𝑈)𝑦) ∈ (BaseSet‘𝑈))
20		eqid 2622	. . . . . . . 8 ⊢ ( +𝑣 ‘𝑈) = ( +𝑣 ‘𝑈)
21	11, 20	nvgcl 27475	. . . . . . 7 ⊢ ((𝑈 ∈ NrmCVec ∧ (𝑥( ·𝑠OLD ‘𝑈)𝑦) ∈ (BaseSet‘𝑈) ∧ 𝑧 ∈ (BaseSet‘𝑈)) → ((𝑥( ·𝑠OLD ‘𝑈)𝑦)( +𝑣 ‘𝑈)𝑧) ∈ (BaseSet‘𝑈))
22	9, 21	mp3an1 1411	. . . . . 6 ⊢ (((𝑥( ·𝑠OLD ‘𝑈)𝑦) ∈ (BaseSet‘𝑈) ∧ 𝑧 ∈ (BaseSet‘𝑈)) → ((𝑥( ·𝑠OLD ‘𝑈)𝑦)( +𝑣 ‘𝑈)𝑧) ∈ (BaseSet‘𝑈))
23	19, 22	stoic3 1701	. . . . 5 ⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ (BaseSet‘𝑈) ∧ 𝑧 ∈ (BaseSet‘𝑈)) → ((𝑥( ·𝑠OLD ‘𝑈)𝑦)( +𝑣 ‘𝑈)𝑧) ∈ (BaseSet‘𝑈))
24		fvco3 6275	. . . . 5 ⊢ ((𝑆:(BaseSet‘𝑈)⟶(BaseSet‘𝑊) ∧ ((𝑥( ·𝑠OLD ‘𝑈)𝑦)( +𝑣 ‘𝑈)𝑧) ∈ (BaseSet‘𝑈)) → ((𝑇 ∘ 𝑆)‘((𝑥( ·𝑠OLD ‘𝑈)𝑦)( +𝑣 ‘𝑈)𝑧)) = (𝑇‘(𝑆‘((𝑥( ·𝑠OLD ‘𝑈)𝑦)( +𝑣 ‘𝑈)𝑧))))
25	14, 23, 24	sylancr 695	. . . 4 ⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ (BaseSet‘𝑈) ∧ 𝑧 ∈ (BaseSet‘𝑈)) → ((𝑇 ∘ 𝑆)‘((𝑥( ·𝑠OLD ‘𝑈)𝑦)( +𝑣 ‘𝑈)𝑧)) = (𝑇‘(𝑆‘((𝑥( ·𝑠OLD ‘𝑈)𝑦)( +𝑣 ‘𝑈)𝑧))))
26		id 22	. . . . . 6 ⊢ (𝑥 ∈ ℂ → 𝑥 ∈ ℂ)
27	14	ffvelrni 6358	. . . . . 6 ⊢ (𝑦 ∈ (BaseSet‘𝑈) → (𝑆‘𝑦) ∈ (BaseSet‘𝑊))
28	14	ffvelrni 6358	. . . . . 6 ⊢ (𝑧 ∈ (BaseSet‘𝑈) → (𝑆‘𝑧) ∈ (BaseSet‘𝑊))
29	1, 2, 3	3pm3.2i 1239	. . . . . . 7 ⊢ (𝑊 ∈ NrmCVec ∧ 𝑋 ∈ NrmCVec ∧ 𝑇 ∈ 𝑀)
30		eqid 2622	. . . . . . . 8 ⊢ ( +𝑣 ‘𝑊) = ( +𝑣 ‘𝑊)
31		eqid 2622	. . . . . . . 8 ⊢ ( +𝑣 ‘𝑋) = ( +𝑣 ‘𝑋)
32		eqid 2622	. . . . . . . 8 ⊢ ( ·𝑠OLD ‘𝑊) = ( ·𝑠OLD ‘𝑊)
33		eqid 2622	. . . . . . . 8 ⊢ ( ·𝑠OLD ‘𝑋) = ( ·𝑠OLD ‘𝑋)
34	4, 5, 30, 31, 32, 33, 6	lnolin 27609	. . . . . . 7 ⊢ (((𝑊 ∈ NrmCVec ∧ 𝑋 ∈ NrmCVec ∧ 𝑇 ∈ 𝑀) ∧ (𝑥 ∈ ℂ ∧ (𝑆‘𝑦) ∈ (BaseSet‘𝑊) ∧ (𝑆‘𝑧) ∈ (BaseSet‘𝑊))) → (𝑇‘((𝑥( ·𝑠OLD ‘𝑊)(𝑆‘𝑦))( +𝑣 ‘𝑊)(𝑆‘𝑧))) = ((𝑥( ·𝑠OLD ‘𝑋)(𝑇‘(𝑆‘𝑦)))( +𝑣 ‘𝑋)(𝑇‘(𝑆‘𝑧))))
35	29, 34	mpan 706	. . . . . 6 ⊢ ((𝑥 ∈ ℂ ∧ (𝑆‘𝑦) ∈ (BaseSet‘𝑊) ∧ (𝑆‘𝑧) ∈ (BaseSet‘𝑊)) → (𝑇‘((𝑥( ·𝑠OLD ‘𝑊)(𝑆‘𝑦))( +𝑣 ‘𝑊)(𝑆‘𝑧))) = ((𝑥( ·𝑠OLD ‘𝑋)(𝑇‘(𝑆‘𝑦)))( +𝑣 ‘𝑋)(𝑇‘(𝑆‘𝑧))))
36	26, 27, 28, 35	syl3an 1368	. . . . 5 ⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ (BaseSet‘𝑈) ∧ 𝑧 ∈ (BaseSet‘𝑈)) → (𝑇‘((𝑥( ·𝑠OLD ‘𝑊)(𝑆‘𝑦))( +𝑣 ‘𝑊)(𝑆‘𝑧))) = ((𝑥( ·𝑠OLD ‘𝑋)(𝑇‘(𝑆‘𝑦)))( +𝑣 ‘𝑋)(𝑇‘(𝑆‘𝑧))))
37	9, 1, 10	3pm3.2i 1239	. . . . . . 7 ⊢ (𝑈 ∈ NrmCVec ∧ 𝑊 ∈ NrmCVec ∧ 𝑆 ∈ 𝐿)
38	11, 4, 20, 30, 17, 32, 12	lnolin 27609	. . . . . . 7 ⊢ (((𝑈 ∈ NrmCVec ∧ 𝑊 ∈ NrmCVec ∧ 𝑆 ∈ 𝐿) ∧ (𝑥 ∈ ℂ ∧ 𝑦 ∈ (BaseSet‘𝑈) ∧ 𝑧 ∈ (BaseSet‘𝑈))) → (𝑆‘((𝑥( ·𝑠OLD ‘𝑈)𝑦)( +𝑣 ‘𝑈)𝑧)) = ((𝑥( ·𝑠OLD ‘𝑊)(𝑆‘𝑦))( +𝑣 ‘𝑊)(𝑆‘𝑧)))
39	37, 38	mpan 706	. . . . . 6 ⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ (BaseSet‘𝑈) ∧ 𝑧 ∈ (BaseSet‘𝑈)) → (𝑆‘((𝑥( ·𝑠OLD ‘𝑈)𝑦)( +𝑣 ‘𝑈)𝑧)) = ((𝑥( ·𝑠OLD ‘𝑊)(𝑆‘𝑦))( +𝑣 ‘𝑊)(𝑆‘𝑧)))
40	39	fveq2d 6195	. . . . 5 ⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ (BaseSet‘𝑈) ∧ 𝑧 ∈ (BaseSet‘𝑈)) → (𝑇‘(𝑆‘((𝑥( ·𝑠OLD ‘𝑈)𝑦)( +𝑣 ‘𝑈)𝑧))) = (𝑇‘((𝑥( ·𝑠OLD ‘𝑊)(𝑆‘𝑦))( +𝑣 ‘𝑊)(𝑆‘𝑧))))
41		simp2 1062	. . . . . . . 8 ⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ (BaseSet‘𝑈) ∧ 𝑧 ∈ (BaseSet‘𝑈)) → 𝑦 ∈ (BaseSet‘𝑈))
42		fvco3 6275	. . . . . . . 8 ⊢ ((𝑆:(BaseSet‘𝑈)⟶(BaseSet‘𝑊) ∧ 𝑦 ∈ (BaseSet‘𝑈)) → ((𝑇 ∘ 𝑆)‘𝑦) = (𝑇‘(𝑆‘𝑦)))
43	14, 41, 42	sylancr 695	. . . . . . 7 ⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ (BaseSet‘𝑈) ∧ 𝑧 ∈ (BaseSet‘𝑈)) → ((𝑇 ∘ 𝑆)‘𝑦) = (𝑇‘(𝑆‘𝑦)))
44	43	oveq2d 6666	. . . . . 6 ⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ (BaseSet‘𝑈) ∧ 𝑧 ∈ (BaseSet‘𝑈)) → (𝑥( ·𝑠OLD ‘𝑋)((𝑇 ∘ 𝑆)‘𝑦)) = (𝑥( ·𝑠OLD ‘𝑋)(𝑇‘(𝑆‘𝑦))))
45		simp3 1063	. . . . . . 7 ⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ (BaseSet‘𝑈) ∧ 𝑧 ∈ (BaseSet‘𝑈)) → 𝑧 ∈ (BaseSet‘𝑈))
46		fvco3 6275	. . . . . . 7 ⊢ ((𝑆:(BaseSet‘𝑈)⟶(BaseSet‘𝑊) ∧ 𝑧 ∈ (BaseSet‘𝑈)) → ((𝑇 ∘ 𝑆)‘𝑧) = (𝑇‘(𝑆‘𝑧)))
47	14, 45, 46	sylancr 695	. . . . . 6 ⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ (BaseSet‘𝑈) ∧ 𝑧 ∈ (BaseSet‘𝑈)) → ((𝑇 ∘ 𝑆)‘𝑧) = (𝑇‘(𝑆‘𝑧)))
48	44, 47	oveq12d 6668	. . . . 5 ⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ (BaseSet‘𝑈) ∧ 𝑧 ∈ (BaseSet‘𝑈)) → ((𝑥( ·𝑠OLD ‘𝑋)((𝑇 ∘ 𝑆)‘𝑦))( +𝑣 ‘𝑋)((𝑇 ∘ 𝑆)‘𝑧)) = ((𝑥( ·𝑠OLD ‘𝑋)(𝑇‘(𝑆‘𝑦)))( +𝑣 ‘𝑋)(𝑇‘(𝑆‘𝑧))))
49	36, 40, 48	3eqtr4rd 2667	. . . 4 ⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ (BaseSet‘𝑈) ∧ 𝑧 ∈ (BaseSet‘𝑈)) → ((𝑥( ·𝑠OLD ‘𝑋)((𝑇 ∘ 𝑆)‘𝑦))( +𝑣 ‘𝑋)((𝑇 ∘ 𝑆)‘𝑧)) = (𝑇‘(𝑆‘((𝑥( ·𝑠OLD ‘𝑈)𝑦)( +𝑣 ‘𝑈)𝑧))))
50	25, 49	eqtr4d 2659	. . 3 ⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ (BaseSet‘𝑈) ∧ 𝑧 ∈ (BaseSet‘𝑈)) → ((𝑇 ∘ 𝑆)‘((𝑥( ·𝑠OLD ‘𝑈)𝑦)( +𝑣 ‘𝑈)𝑧)) = ((𝑥( ·𝑠OLD ‘𝑋)((𝑇 ∘ 𝑆)‘𝑦))( +𝑣 ‘𝑋)((𝑇 ∘ 𝑆)‘𝑧)))
51	50	rgen3 2976	. 2 ⊢ ∀𝑥 ∈ ℂ ∀𝑦 ∈ (BaseSet‘𝑈)∀𝑧 ∈ (BaseSet‘𝑈)((𝑇 ∘ 𝑆)‘((𝑥( ·𝑠OLD ‘𝑈)𝑦)( +𝑣 ‘𝑈)𝑧)) = ((𝑥( ·𝑠OLD ‘𝑋)((𝑇 ∘ 𝑆)‘𝑦))( +𝑣 ‘𝑋)((𝑇 ∘ 𝑆)‘𝑧))
52		lnocoi.n	. . . 4 ⊢ 𝑁 = (𝑈 LnOp 𝑋)
53	11, 5, 20, 31, 17, 33, 52	islno 27608	. . 3 ⊢ ((𝑈 ∈ NrmCVec ∧ 𝑋 ∈ NrmCVec) → ((𝑇 ∘ 𝑆) ∈ 𝑁 ↔ ((𝑇 ∘ 𝑆):(BaseSet‘𝑈)⟶(BaseSet‘𝑋) ∧ ∀𝑥 ∈ ℂ ∀𝑦 ∈ (BaseSet‘𝑈)∀𝑧 ∈ (BaseSet‘𝑈)((𝑇 ∘ 𝑆)‘((𝑥( ·𝑠OLD ‘𝑈)𝑦)( +𝑣 ‘𝑈)𝑧)) = ((𝑥( ·𝑠OLD ‘𝑋)((𝑇 ∘ 𝑆)‘𝑦))( +𝑣 ‘𝑋)((𝑇 ∘ 𝑆)‘𝑧)))))
54	9, 2, 53	mp2an 708	. 2 ⊢ ((𝑇 ∘ 𝑆) ∈ 𝑁 ↔ ((𝑇 ∘ 𝑆):(BaseSet‘𝑈)⟶(BaseSet‘𝑋) ∧ ∀𝑥 ∈ ℂ ∀𝑦 ∈ (BaseSet‘𝑈)∀𝑧 ∈ (BaseSet‘𝑈)((𝑇 ∘ 𝑆)‘((𝑥( ·𝑠OLD ‘𝑈)𝑦)( +𝑣 ‘𝑈)𝑧)) = ((𝑥( ·𝑠OLD ‘𝑋)((𝑇 ∘ 𝑆)‘𝑦))( +𝑣 ‘𝑋)((𝑇 ∘ 𝑆)‘𝑧))))
55	16, 51, 54	mpbir2an 955	1 ⊢ (𝑇 ∘ 𝑆) ∈ 𝑁

Syntax hints:   ↔ wb 196   ∧ wa 384   ∧ w3a 1037   = wceq 1483   ∈ wcel 1990  ∀wral 2912   ∘ ccom 5118  ⟶wf 5884  ‘cfv 5888  (class class class)co 6650  ℂcc 9934  NrmCVeccnv 27439   +_𝑣 cpv 27440  BaseSetcba 27441   ·_𝑠OLD cns 27442   LnOp clno 27595

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-8 1992  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-rep 4771  ax-sep 4781  ax-nul 4789  ax-pow 4843  ax-pr 4906  ax-un 6949

This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3an 1039  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ne 2795  df-ral 2917  df-rex 2918  df-reu 2919  df-rab 2921  df-v 3202  df-sbc 3436  df-csb 3534  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-nul 3916  df-if 4087  df-pw 4160  df-sn 4178  df-pr 4180  df-op 4184  df-uni 4437  df-iun 4522  df-br 4654  df-opab 4713  df-mpt 4730  df-id 5024  df-xp 5120  df-rel 5121  df-cnv 5122  df-co 5123  df-dm 5124  df-rn 5125  df-res 5126  df-ima 5127  df-iota 5851  df-fun 5890  df-fn 5891  df-f 5892  df-f1 5893  df-fo 5894  df-f1o 5895  df-fv 5896  df-ov 6653  df-oprab 6654  df-mpt2 6655  df-1st 7168  df-2nd 7169  df-map 7859  df-grpo 27347  df-ablo 27399  df-vc 27414  df-nv 27447  df-va 27450  df-ba 27451  df-sm 27452  df-0v 27453  df-nmcv 27455  df-lno 27599

This theorem is referenced by: (None)