counop - Hilbert Space Explorer

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Theorem counop 31950

Description: The composition of two unitary operators is unitary. (Contributed by NM, 22-Jan-2006.) (New usage is discouraged.)

**Assertion**
Ref	Expression
counop	⊢ ((𝑆 ∈ UniOp ∧ 𝑇 ∈ UniOp) → (𝑆 ∘ 𝑇) ∈ UniOp)

Proof of Theorem counop Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		unopf1o 31945	. . . 4 ⊢ (𝑆 ∈ UniOp → 𝑆: ℋ–1-1-onto→ ℋ)
2		unopf1o 31945	. . . 4 ⊢ (𝑇 ∈ UniOp → 𝑇: ℋ–1-1-onto→ ℋ)
3		f1oco 6872	. . . 4 ⊢ ((𝑆: ℋ–1-1-onto→ ℋ ∧ 𝑇: ℋ–1-1-onto→ ℋ) → (𝑆 ∘ 𝑇): ℋ–1-1-onto→ ℋ)
4	1, 2, 3	syl2an 596	. . 3 ⊢ ((𝑆 ∈ UniOp ∧ 𝑇 ∈ UniOp) → (𝑆 ∘ 𝑇): ℋ–1-1-onto→ ℋ)
5		f1ofo 6856	. . 3 ⊢ ((𝑆 ∘ 𝑇): ℋ–1-1-onto→ ℋ → (𝑆 ∘ 𝑇): ℋ–onto→ ℋ)
6	4, 5	syl 17	. 2 ⊢ ((𝑆 ∈ UniOp ∧ 𝑇 ∈ UniOp) → (𝑆 ∘ 𝑇): ℋ–onto→ ℋ)
7		f1of 6849	. . . . . . . 8 ⊢ (𝑇: ℋ–1-1-onto→ ℋ → 𝑇: ℋ⟶ ℋ)
8	2, 7	syl 17	. . . . . . 7 ⊢ (𝑇 ∈ UniOp → 𝑇: ℋ⟶ ℋ)
9	8	adantl 481	. . . . . 6 ⊢ ((𝑆 ∈ UniOp ∧ 𝑇 ∈ UniOp) → 𝑇: ℋ⟶ ℋ)
10		simpl 482	. . . . . 6 ⊢ ((𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ) → 𝑥 ∈ ℋ)
11		fvco3 7008	. . . . . 6 ⊢ ((𝑇: ℋ⟶ ℋ ∧ 𝑥 ∈ ℋ) → ((𝑆 ∘ 𝑇)‘𝑥) = (𝑆‘(𝑇‘𝑥)))
12	9, 10, 11	syl2an 596	. . . . 5 ⊢ (((𝑆 ∈ UniOp ∧ 𝑇 ∈ UniOp) ∧ (𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ)) → ((𝑆 ∘ 𝑇)‘𝑥) = (𝑆‘(𝑇‘𝑥)))
13		simpr 484	. . . . . 6 ⊢ ((𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ) → 𝑦 ∈ ℋ)
14		fvco3 7008	. . . . . 6 ⊢ ((𝑇: ℋ⟶ ℋ ∧ 𝑦 ∈ ℋ) → ((𝑆 ∘ 𝑇)‘𝑦) = (𝑆‘(𝑇‘𝑦)))
15	9, 13, 14	syl2an 596	. . . . 5 ⊢ (((𝑆 ∈ UniOp ∧ 𝑇 ∈ UniOp) ∧ (𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ)) → ((𝑆 ∘ 𝑇)‘𝑦) = (𝑆‘(𝑇‘𝑦)))
16	12, 15	oveq12d 7449	. . . 4 ⊢ (((𝑆 ∈ UniOp ∧ 𝑇 ∈ UniOp) ∧ (𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ)) → (((𝑆 ∘ 𝑇)‘𝑥) ·_ih ((𝑆 ∘ 𝑇)‘𝑦)) = ((𝑆‘(𝑇‘𝑥)) ·_ih (𝑆‘(𝑇‘𝑦))))
17		ffvelcdm 7101	. . . . . . . 8 ⊢ ((𝑇: ℋ⟶ ℋ ∧ 𝑥 ∈ ℋ) → (𝑇‘𝑥) ∈ ℋ)
18		ffvelcdm 7101	. . . . . . . 8 ⊢ ((𝑇: ℋ⟶ ℋ ∧ 𝑦 ∈ ℋ) → (𝑇‘𝑦) ∈ ℋ)
19	17, 18	anim12dan 619	. . . . . . 7 ⊢ ((𝑇: ℋ⟶ ℋ ∧ (𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ)) → ((𝑇‘𝑥) ∈ ℋ ∧ (𝑇‘𝑦) ∈ ℋ))
20	8, 19	sylan 580	. . . . . 6 ⊢ ((𝑇 ∈ UniOp ∧ (𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ)) → ((𝑇‘𝑥) ∈ ℋ ∧ (𝑇‘𝑦) ∈ ℋ))
21		unop 31944	. . . . . . 7 ⊢ ((𝑆 ∈ UniOp ∧ (𝑇‘𝑥) ∈ ℋ ∧ (𝑇‘𝑦) ∈ ℋ) → ((𝑆‘(𝑇‘𝑥)) ·_ih (𝑆‘(𝑇‘𝑦))) = ((𝑇‘𝑥) ·_ih (𝑇‘𝑦)))
22	21	3expb 1119	. . . . . 6 ⊢ ((𝑆 ∈ UniOp ∧ ((𝑇‘𝑥) ∈ ℋ ∧ (𝑇‘𝑦) ∈ ℋ)) → ((𝑆‘(𝑇‘𝑥)) ·_ih (𝑆‘(𝑇‘𝑦))) = ((𝑇‘𝑥) ·_ih (𝑇‘𝑦)))
23	20, 22	sylan2 593	. . . . 5 ⊢ ((𝑆 ∈ UniOp ∧ (𝑇 ∈ UniOp ∧ (𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ))) → ((𝑆‘(𝑇‘𝑥)) ·_ih (𝑆‘(𝑇‘𝑦))) = ((𝑇‘𝑥) ·_ih (𝑇‘𝑦)))
24	23	anassrs 467	. . . 4 ⊢ (((𝑆 ∈ UniOp ∧ 𝑇 ∈ UniOp) ∧ (𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ)) → ((𝑆‘(𝑇‘𝑥)) ·_ih (𝑆‘(𝑇‘𝑦))) = ((𝑇‘𝑥) ·_ih (𝑇‘𝑦)))
25		unop 31944	. . . . . 6 ⊢ ((𝑇 ∈ UniOp ∧ 𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ) → ((𝑇‘𝑥) ·_ih (𝑇‘𝑦)) = (𝑥 ·_ih 𝑦))
26	25	3expb 1119	. . . . 5 ⊢ ((𝑇 ∈ UniOp ∧ (𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ)) → ((𝑇‘𝑥) ·_ih (𝑇‘𝑦)) = (𝑥 ·_ih 𝑦))
27	26	adantll 714	. . . 4 ⊢ (((𝑆 ∈ UniOp ∧ 𝑇 ∈ UniOp) ∧ (𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ)) → ((𝑇‘𝑥) ·_ih (𝑇‘𝑦)) = (𝑥 ·_ih 𝑦))
28	16, 24, 27	3eqtrd 2779	. . 3 ⊢ (((𝑆 ∈ UniOp ∧ 𝑇 ∈ UniOp) ∧ (𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ)) → (((𝑆 ∘ 𝑇)‘𝑥) ·_ih ((𝑆 ∘ 𝑇)‘𝑦)) = (𝑥 ·_ih 𝑦))
29	28	ralrimivva 3200	. 2 ⊢ ((𝑆 ∈ UniOp ∧ 𝑇 ∈ UniOp) → ∀𝑥 ∈ ℋ ∀𝑦 ∈ ℋ (((𝑆 ∘ 𝑇)‘𝑥) ·_ih ((𝑆 ∘ 𝑇)‘𝑦)) = (𝑥 ·_ih 𝑦))
30		elunop 31901	. 2 ⊢ ((𝑆 ∘ 𝑇) ∈ UniOp ↔ ((𝑆 ∘ 𝑇): ℋ–onto→ ℋ ∧ ∀𝑥 ∈ ℋ ∀𝑦 ∈ ℋ (((𝑆 ∘ 𝑇)‘𝑥) ·_ih ((𝑆 ∘ 𝑇)‘𝑦)) = (𝑥 ·_ih 𝑦)))
31	6, 29, 30	sylanbrc 583	1 ⊢ ((𝑆 ∈ UniOp ∧ 𝑇 ∈ UniOp) → (𝑆 ∘ 𝑇) ∈ UniOp)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 395 = wceq 1537 ∈ wcel 2106 ∀wral 3059 ∘ ccom 5693 ⟶wf 6559 –onto→wfo 6561 –1-1-onto→wf1o 6562 ‘cfv 6563 (class class class)co 7431 ℋchba 30948 ·_ih csp 30951 UniOpcuo 30978

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1908 ax-6 1965 ax-7 2005 ax-8 2108 ax-9 2116 ax-10 2139 ax-11 2155 ax-12 2175 ax-ext 2706 ax-rep 5285 ax-sep 5302 ax-nul 5312 ax-pow 5371 ax-pr 5438 ax-un 7754 ax-resscn 11210 ax-1cn 11211 ax-icn 11212 ax-addcl 11213 ax-addrcl 11214 ax-mulcl 11215 ax-mulrcl 11216 ax-mulcom 11217 ax-addass 11218 ax-mulass 11219 ax-distr 11220 ax-i2m1 11221 ax-1ne0 11222 ax-1rid 11223 ax-rnegex 11224 ax-rrecex 11225 ax-cnre 11226 ax-pre-lttri 11227 ax-pre-lttrn 11228 ax-pre-ltadd 11229 ax-pre-mulgt0 11230 ax-hilex 31028 ax-hfvadd 31029 ax-hvcom 31030 ax-hvass 31031 ax-hv0cl 31032 ax-hvaddid 31033 ax-hfvmul 31034 ax-hvmulid 31035 ax-hvdistr2 31038 ax-hvmul0 31039 ax-hfi 31108 ax-his1 31111 ax-his2 31112 ax-his3 31113 ax-his4 31114

This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1540 df-fal 1550 df-ex 1777 df-nf 1781 df-sb 2063 df-mo 2538 df-eu 2567 df-clab 2713 df-cleq 2727 df-clel 2814 df-nfc 2890 df-ne 2939 df-nel 3045 df-ral 3060 df-rex 3069 df-rmo 3378 df-reu 3379 df-rab 3434 df-v 3480 df-sbc 3792 df-csb 3909 df-dif 3966 df-un 3968 df-in 3970 df-ss 3980 df-nul 4340 df-if 4532 df-pw 4607 df-sn 4632 df-pr 4634 df-op 4638 df-uni 4913 df-iun 4998 df-br 5149 df-opab 5211 df-mpt 5232 df-id 5583 df-po 5597 df-so 5598 df-xp 5695 df-rel 5696 df-cnv 5697 df-co 5698 df-dm 5699 df-rn 5700 df-res 5701 df-ima 5702 df-iota 6516 df-fun 6565 df-fn 6566 df-f 6567 df-f1 6568 df-fo 6569 df-f1o 6570 df-fv 6571 df-riota 7388 df-ov 7434 df-oprab 7435 df-mpo 7436 df-er 8744 df-en 8985 df-dom 8986 df-sdom 8987 df-pnf 11295 df-mnf 11296 df-xr 11297 df-ltxr 11298 df-le 11299 df-sub 11492 df-neg 11493 df-div 11919 df-2 12327 df-cj 15135 df-re 15136 df-im 15137 df-hvsub 31000 df-unop 31872

This theorem is referenced by: (None)

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