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Theorem counop 30863

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 30858	. . . 4 ⊢ (𝑆 ∈ UniOp → 𝑆: ℋ–1-1-onto→ ℋ)
2		unopf1o 30858	. . . 4 ⊢ (𝑇 ∈ UniOp → 𝑇: ℋ–1-1-onto→ ℋ)
3		f1oco 6807	. . . 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 6791	. . 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 6784	. . . . . . . 8 ⊢ (𝑇: ℋ–1-1-onto→ ℋ → 𝑇: ℋ⟶ ℋ)
8	2, 7	syl 17	. . . . . . 7 ⊢ (𝑇 ∈ UniOp → 𝑇: ℋ⟶ ℋ)
9	8	adantl 482	. . . . . 6 ⊢ ((𝑆 ∈ UniOp ∧ 𝑇 ∈ UniOp) → 𝑇: ℋ⟶ ℋ)
10		simpl 483	. . . . . 6 ⊢ ((𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ) → 𝑥 ∈ ℋ)
11		fvco3 6940	. . . . . 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 485	. . . . . 6 ⊢ ((𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ) → 𝑦 ∈ ℋ)
14		fvco3 6940	. . . . . 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 7375	. . . 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 7032	. . . . . . . 8 ⊢ ((𝑇: ℋ⟶ ℋ ∧ 𝑥 ∈ ℋ) → (𝑇‘𝑥) ∈ ℋ)
18		ffvelcdm 7032	. . . . . . . 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 30857	. . . . . . 7 ⊢ ((𝑆 ∈ UniOp ∧ (𝑇‘𝑥) ∈ ℋ ∧ (𝑇‘𝑦) ∈ ℋ) → ((𝑆‘(𝑇‘𝑥)) ·_ih (𝑆‘(𝑇‘𝑦))) = ((𝑇‘𝑥) ·_ih (𝑇‘𝑦)))
22	21	3expb 1120	. . . . . 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 468	. . . 4 ⊢ (((𝑆 ∈ UniOp ∧ 𝑇 ∈ UniOp) ∧ (𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ)) → ((𝑆‘(𝑇‘𝑥)) ·_ih (𝑆‘(𝑇‘𝑦))) = ((𝑇‘𝑥) ·_ih (𝑇‘𝑦)))
25		unop 30857	. . . . . 6 ⊢ ((𝑇 ∈ UniOp ∧ 𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ) → ((𝑇‘𝑥) ·_ih (𝑇‘𝑦)) = (𝑥 ·_ih 𝑦))
26	25	3expb 1120	. . . . 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 2780	. . 3 ⊢ (((𝑆 ∈ UniOp ∧ 𝑇 ∈ UniOp) ∧ (𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ)) → (((𝑆 ∘ 𝑇)‘𝑥) ·_ih ((𝑆 ∘ 𝑇)‘𝑦)) = (𝑥 ·_ih 𝑦))
29	28	ralrimivva 3197	. 2 ⊢ ((𝑆 ∈ UniOp ∧ 𝑇 ∈ UniOp) → ∀𝑥 ∈ ℋ ∀𝑦 ∈ ℋ (((𝑆 ∘ 𝑇)‘𝑥) ·_ih ((𝑆 ∘ 𝑇)‘𝑦)) = (𝑥 ·_ih 𝑦))
30		elunop 30814	. 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 396 = wceq 1541 ∈ wcel 2106 ∀wral 3064 ∘ ccom 5637 ⟶wf 6492 –onto→wfo 6494 –1-1-onto→wf1o 6495 ‘cfv 6496 (class class class)co 7357 ℋchba 29861 ·_ih csp 29864 UniOpcuo 29891

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2707 ax-rep 5242 ax-sep 5256 ax-nul 5263 ax-pow 5320 ax-pr 5384 ax-un 7672 ax-resscn 11108 ax-1cn 11109 ax-icn 11110 ax-addcl 11111 ax-addrcl 11112 ax-mulcl 11113 ax-mulrcl 11114 ax-mulcom 11115 ax-addass 11116 ax-mulass 11117 ax-distr 11118 ax-i2m1 11119 ax-1ne0 11120 ax-1rid 11121 ax-rnegex 11122 ax-rrecex 11123 ax-cnre 11124 ax-pre-lttri 11125 ax-pre-lttrn 11126 ax-pre-ltadd 11127 ax-pre-mulgt0 11128 ax-hilex 29941 ax-hfvadd 29942 ax-hvcom 29943 ax-hvass 29944 ax-hv0cl 29945 ax-hvaddid 29946 ax-hfvmul 29947 ax-hvmulid 29948 ax-hvdistr2 29951 ax-hvmul0 29952 ax-hfi 30021 ax-his1 30024 ax-his2 30025 ax-his3 30026 ax-his4 30027

This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3or 1088 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2538 df-eu 2567 df-clab 2714 df-cleq 2728 df-clel 2814 df-nfc 2889 df-ne 2944 df-nel 3050 df-ral 3065 df-rex 3074 df-rmo 3353 df-reu 3354 df-rab 3408 df-v 3447 df-sbc 3740 df-csb 3856 df-dif 3913 df-un 3915 df-in 3917 df-ss 3927 df-nul 4283 df-if 4487 df-pw 4562 df-sn 4587 df-pr 4589 df-op 4593 df-uni 4866 df-iun 4956 df-br 5106 df-opab 5168 df-mpt 5189 df-id 5531 df-po 5545 df-so 5546 df-xp 5639 df-rel 5640 df-cnv 5641 df-co 5642 df-dm 5643 df-rn 5644 df-res 5645 df-ima 5646 df-iota 6448 df-fun 6498 df-fn 6499 df-f 6500 df-f1 6501 df-fo 6502 df-f1o 6503 df-fv 6504 df-riota 7313 df-ov 7360 df-oprab 7361 df-mpo 7362 df-er 8648 df-en 8884 df-dom 8885 df-sdom 8886 df-pnf 11191 df-mnf 11192 df-xr 11193 df-ltxr 11194 df-le 11195 df-sub 11387 df-neg 11388 df-div 11813 df-2 12216 df-cj 14984 df-re 14985 df-im 14986 df-hvsub 29913 df-unop 30785

This theorem is referenced by: (None)

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