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Theorem counop 29692

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 29687	. . . 4 ⊢ (𝑆 ∈ UniOp → 𝑆: ℋ–1-1-onto→ ℋ)
2		unopf1o 29687	. . . 4 ⊢ (𝑇 ∈ UniOp → 𝑇: ℋ–1-1-onto→ ℋ)
3		f1oco 6632	. . . 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 597	. . 3 ⊢ ((𝑆 ∈ UniOp ∧ 𝑇 ∈ UniOp) → (𝑆 ∘ 𝑇): ℋ–1-1-onto→ ℋ)
5		f1ofo 6617	. . 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 6610	. . . . . . . 8 ⊢ (𝑇: ℋ–1-1-onto→ ℋ → 𝑇: ℋ⟶ ℋ)
8	2, 7	syl 17	. . . . . . 7 ⊢ (𝑇 ∈ UniOp → 𝑇: ℋ⟶ ℋ)
9	8	adantl 484	. . . . . 6 ⊢ ((𝑆 ∈ UniOp ∧ 𝑇 ∈ UniOp) → 𝑇: ℋ⟶ ℋ)
10		simpl 485	. . . . . 6 ⊢ ((𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ) → 𝑥 ∈ ℋ)
11		fvco3 6755	. . . . . 6 ⊢ ((𝑇: ℋ⟶ ℋ ∧ 𝑥 ∈ ℋ) → ((𝑆 ∘ 𝑇)‘𝑥) = (𝑆‘(𝑇‘𝑥)))
12	9, 10, 11	syl2an 597	. . . . 5 ⊢ (((𝑆 ∈ UniOp ∧ 𝑇 ∈ UniOp) ∧ (𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ)) → ((𝑆 ∘ 𝑇)‘𝑥) = (𝑆‘(𝑇‘𝑥)))
13		simpr 487	. . . . . 6 ⊢ ((𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ) → 𝑦 ∈ ℋ)
14		fvco3 6755	. . . . . 6 ⊢ ((𝑇: ℋ⟶ ℋ ∧ 𝑦 ∈ ℋ) → ((𝑆 ∘ 𝑇)‘𝑦) = (𝑆‘(𝑇‘𝑦)))
15	9, 13, 14	syl2an 597	. . . . 5 ⊢ (((𝑆 ∈ UniOp ∧ 𝑇 ∈ UniOp) ∧ (𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ)) → ((𝑆 ∘ 𝑇)‘𝑦) = (𝑆‘(𝑇‘𝑦)))
16	12, 15	oveq12d 7168	. . . 4 ⊢ (((𝑆 ∈ UniOp ∧ 𝑇 ∈ UniOp) ∧ (𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ)) → (((𝑆 ∘ 𝑇)‘𝑥) ·_ih ((𝑆 ∘ 𝑇)‘𝑦)) = ((𝑆‘(𝑇‘𝑥)) ·_ih (𝑆‘(𝑇‘𝑦))))
17		ffvelrn 6844	. . . . . . . 8 ⊢ ((𝑇: ℋ⟶ ℋ ∧ 𝑥 ∈ ℋ) → (𝑇‘𝑥) ∈ ℋ)
18		ffvelrn 6844	. . . . . . . 8 ⊢ ((𝑇: ℋ⟶ ℋ ∧ 𝑦 ∈ ℋ) → (𝑇‘𝑦) ∈ ℋ)
19	17, 18	anim12dan 620	. . . . . . 7 ⊢ ((𝑇: ℋ⟶ ℋ ∧ (𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ)) → ((𝑇‘𝑥) ∈ ℋ ∧ (𝑇‘𝑦) ∈ ℋ))
20	8, 19	sylan 582	. . . . . 6 ⊢ ((𝑇 ∈ UniOp ∧ (𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ)) → ((𝑇‘𝑥) ∈ ℋ ∧ (𝑇‘𝑦) ∈ ℋ))
21		unop 29686	. . . . . . 7 ⊢ ((𝑆 ∈ UniOp ∧ (𝑇‘𝑥) ∈ ℋ ∧ (𝑇‘𝑦) ∈ ℋ) → ((𝑆‘(𝑇‘𝑥)) ·_ih (𝑆‘(𝑇‘𝑦))) = ((𝑇‘𝑥) ·_ih (𝑇‘𝑦)))
22	21	3expb 1116	. . . . . 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 594	. . . . 5 ⊢ ((𝑆 ∈ UniOp ∧ (𝑇 ∈ UniOp ∧ (𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ))) → ((𝑆‘(𝑇‘𝑥)) ·_ih (𝑆‘(𝑇‘𝑦))) = ((𝑇‘𝑥) ·_ih (𝑇‘𝑦)))
24	23	anassrs 470	. . . 4 ⊢ (((𝑆 ∈ UniOp ∧ 𝑇 ∈ UniOp) ∧ (𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ)) → ((𝑆‘(𝑇‘𝑥)) ·_ih (𝑆‘(𝑇‘𝑦))) = ((𝑇‘𝑥) ·_ih (𝑇‘𝑦)))
25		unop 29686	. . . . . 6 ⊢ ((𝑇 ∈ UniOp ∧ 𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ) → ((𝑇‘𝑥) ·_ih (𝑇‘𝑦)) = (𝑥 ·_ih 𝑦))
26	25	3expb 1116	. . . . 5 ⊢ ((𝑇 ∈ UniOp ∧ (𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ)) → ((𝑇‘𝑥) ·_ih (𝑇‘𝑦)) = (𝑥 ·_ih 𝑦))
27	26	adantll 712	. . . 4 ⊢ (((𝑆 ∈ UniOp ∧ 𝑇 ∈ UniOp) ∧ (𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ)) → ((𝑇‘𝑥) ·_ih (𝑇‘𝑦)) = (𝑥 ·_ih 𝑦))
28	16, 24, 27	3eqtrd 2860	. . 3 ⊢ (((𝑆 ∈ UniOp ∧ 𝑇 ∈ UniOp) ∧ (𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ)) → (((𝑆 ∘ 𝑇)‘𝑥) ·_ih ((𝑆 ∘ 𝑇)‘𝑦)) = (𝑥 ·_ih 𝑦))
29	28	ralrimivva 3191	. 2 ⊢ ((𝑆 ∈ UniOp ∧ 𝑇 ∈ UniOp) → ∀𝑥 ∈ ℋ ∀𝑦 ∈ ℋ (((𝑆 ∘ 𝑇)‘𝑥) ·_ih ((𝑆 ∘ 𝑇)‘𝑦)) = (𝑥 ·_ih 𝑦))
30		elunop 29643	. 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 585	1 ⊢ ((𝑆 ∈ UniOp ∧ 𝑇 ∈ UniOp) → (𝑆 ∘ 𝑇) ∈ UniOp)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 398 = wceq 1533 ∈ wcel 2110 ∀wral 3138 ∘ ccom 5554 ⟶wf 6346 –onto→wfo 6348 –1-1-onto→wf1o 6349 ‘cfv 6350 (class class class)co 7150 ℋchba 28690 ·_ih csp 28693 UniOpcuo 28720

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 1907 ax-6 1966 ax-7 2011 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2156 ax-12 2172 ax-ext 2793 ax-rep 5183 ax-sep 5196 ax-nul 5203 ax-pow 5259 ax-pr 5322 ax-un 7455 ax-resscn 10588 ax-1cn 10589 ax-icn 10590 ax-addcl 10591 ax-addrcl 10592 ax-mulcl 10593 ax-mulrcl 10594 ax-mulcom 10595 ax-addass 10596 ax-mulass 10597 ax-distr 10598 ax-i2m1 10599 ax-1ne0 10600 ax-1rid 10601 ax-rnegex 10602 ax-rrecex 10603 ax-cnre 10604 ax-pre-lttri 10605 ax-pre-lttrn 10606 ax-pre-ltadd 10607 ax-pre-mulgt0 10608 ax-hilex 28770 ax-hfvadd 28771 ax-hvcom 28772 ax-hvass 28773 ax-hv0cl 28774 ax-hvaddid 28775 ax-hfvmul 28776 ax-hvmulid 28777 ax-hvdistr2 28780 ax-hvmul0 28781 ax-hfi 28850 ax-his1 28853 ax-his2 28854 ax-his3 28855 ax-his4 28856

This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1536 df-ex 1777 df-nf 1781 df-sb 2066 df-mo 2618 df-eu 2650 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ne 3017 df-nel 3124 df-ral 3143 df-rex 3144 df-reu 3145 df-rmo 3146 df-rab 3147 df-v 3497 df-sbc 3773 df-csb 3884 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-nul 4292 df-if 4468 df-pw 4541 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4833 df-iun 4914 df-br 5060 df-opab 5122 df-mpt 5140 df-id 5455 df-po 5469 df-so 5470 df-xp 5556 df-rel 5557 df-cnv 5558 df-co 5559 df-dm 5560 df-rn 5561 df-res 5562 df-ima 5563 df-iota 6309 df-fun 6352 df-fn 6353 df-f 6354 df-f1 6355 df-fo 6356 df-f1o 6357 df-fv 6358 df-riota 7108 df-ov 7153 df-oprab 7154 df-mpo 7155 df-er 8283 df-en 8504 df-dom 8505 df-sdom 8506 df-pnf 10671 df-mnf 10672 df-xr 10673 df-ltxr 10674 df-le 10675 df-sub 10866 df-neg 10867 df-div 11292 df-2 11694 df-cj 14452 df-re 14453 df-im 14454 df-hvsub 28742 df-unop 29614

This theorem is referenced by: (None)

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