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Related theorems GIF version |
| Description: A necessary and sufficient condition for the product of two projectors to be a projector is that the projectors commute. Part 1 of Theorem 1 of [AkhiezerGlazman] p. 65. |
| Ref | Expression |
|---|---|
| pjclem1.1 | ⊢ G ∈ Cℋ |
| pjclem1.2 | ⊢ H ∈ Cℋ |
| Ref | Expression |
|---|---|
| pjcmmul1 | ⊢ (((proj ‘G) ∘ (proj ‘H)) = ((proj ‘H) ∘ (proj ‘G)) ↔ ((proj ‘G) ∘ (proj ‘H)) ∈ ran proj) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | pjclem1.1 | . . . 4 ⊢ G ∈ Cℋ | |
| 2 | pjclem1.2 | . . . 4 ⊢ H ∈ Cℋ | |
| 3 | 1, 2 | pjclem4 10065 | . . 3 ⊢ (((proj ‘G) ∘ (proj ‘H)) = ((proj ‘H) ∘ (proj ‘G)) → ((proj ‘G) ∘ (proj ‘H)) = (proj ‘(G ∩ H))) |
| 4 | pjmfn 9600 | . . . 4 ⊢ proj Fn Cℋ | |
| 5 | 1, 2 | chincl 9321 | . . . 4 ⊢ (G ∩ H) ∈ Cℋ |
| 6 | fnfvelrn 3804 | . . . 4 ⊢ ((proj Fn Cℋ ⋀ (G ∩ H) ∈ Cℋ ) → (proj ‘(G ∩ H)) ∈ ran proj) | |
| 7 | 4, 5, 6 | mp2an 696 | . . 3 ⊢ (proj ‘(G ∩ H)) ∈ ran proj |
| 8 | 3, 7 | syl6eqel 1553 | . 2 ⊢ (((proj ‘G) ∘ (proj ‘H)) = ((proj ‘H) ∘ (proj ‘G)) → ((proj ‘G) ∘ (proj ‘H)) ∈ ran proj) |
| 9 | pjadj2t 10052 | . . 3 ⊢ (((proj ‘G) ∘ (proj ‘H)) ∈ ran proj → (adjh ‘((proj ‘G) ∘ (proj ‘H))) = ((proj ‘G) ∘ (proj ‘H))) | |
| 10 | 1 | pjbdln 10014 | . . . . 5 ⊢ (proj ‘G) ∈ BndLinOp |
| 11 | 2 | pjbdln 10014 | . . . . 5 ⊢ (proj ‘H) ∈ BndLinOp |
| 12 | 10, 11 | adjco 9971 | . . . 4 ⊢ (adjh ‘((proj ‘G) ∘ (proj ‘H))) = ((adjh ‘(proj ‘H)) ∘ (adjh ‘(proj ‘G))) |
| 13 | pjadj3t 10053 | . . . . . 6 ⊢ (H ∈ Cℋ → (adjh ‘(proj ‘H)) = (proj ‘H)) | |
| 14 | 2, 13 | ax-mp 7 | . . . . 5 ⊢ (adjh ‘(proj ‘H)) = (proj ‘H) |
| 15 | 14 | coeq1i 3278 | . . . 4 ⊢ ((adjh ‘(proj ‘H)) ∘ (adjh ‘(proj ‘G))) = ((proj ‘H) ∘ (adjh ‘(proj ‘G))) |
| 16 | pjadj3t 10053 | . . . . . 6 ⊢ (G ∈ Cℋ → (adjh ‘(proj ‘G)) = (proj ‘G)) | |
| 17 | 1, 16 | ax-mp 7 | . . . . 5 ⊢ (adjh ‘(proj ‘G)) = (proj ‘G) |
| 18 | 17 | coeq2i 3279 | . . . 4 ⊢ ((proj ‘H) ∘ (adjh ‘(proj ‘G))) = ((proj ‘H) ∘ (proj ‘G)) |
| 19 | 12, 15, 18 | 3eqtr 1496 | . . 3 ⊢ (adjh ‘((proj ‘G) ∘ (proj ‘H))) = ((proj ‘H) ∘ (proj ‘G)) |
| 20 | 9, 19 | syl5reqr 1519 | . 2 ⊢ (((proj ‘G) ∘ (proj ‘H)) ∈ ran proj → ((proj ‘G) ∘ (proj ‘H)) = ((proj ‘H) ∘ (proj ‘G))) |
| 21 | 8, 20 | impbi 157 | 1 ⊢ (((proj ‘G) ∘ (proj ‘H)) = ((proj ‘H) ∘ (proj ‘G)) ↔ ((proj ‘G) ∘ (proj ‘H)) ∈ ran proj) |
| Colors of variables: wff set class |
| Syntax hints: ↔ wb 146 = wceq 954 ∈ wcel 956 ∩ cin 2042 ran crn 3166 ∘ ccom 3169 Fn wfn 3172 ‘cfv 3177 Cℋ cch 8737 projcpj 8745 adjhcado 8763 |
| This theorem is referenced by: pjcmmul2 10068 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 960 ax-gen 961 ax-8 962 ax-9 963 ax-10 964 ax-11 965 ax-12 966 ax-13 967 ax-14 968 ax-17 969 ax-4 971 ax-5o 973 ax-6o 976 ax-9o 1121 ax-10o 1138 ax-16 1208 ax-11o 1216 ax-ext 1457 ax-rep 2688 ax-sep 2698 ax-nul 2705 ax-pow 2737 ax-pr 2774 ax-un 2861 ax-reg 4573 ax-inf2 4605 ax-ac 4724 ax-hilex 8808 ax-hfvadd 8809 ax-hvcom 8810 ax-hvass 8811 ax-hv0cl 8812 ax-hvaddid 8813 ax-hfvmul 8814 ax-hvmulid 8815 ax-hvmulass 8816 ax-hvdistr1 8817 ax-hvdistr2 8818 ax-hvmul0 8819 ax-hfi 8885 ax-his1 8888 ax-his2 8889 ax-his3 8890 ax-his4 8891 ax-hcompl 9010 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-3or 775 df-3an 776 df-ex 979 df-sb 1170 df-eu 1380 df-mo 1381 df-clab 1462 df-cleq 1467 df-clel 1470 df-ne 1584 df-nel 1585 df-ral 1646 df-rex 1647 df-reu 1648 df-rab 1649 df-v 1808 df-sbc 1938 df-csb 1998 df-dif 2045 df-un 2046 df-in 2047 df-ss 2049 df-pss 2051 df-nul 2277 df-if 2358 df-pw 2398 df-sn 2408 df-pr 2409 df-tp 2411 df-op 2412 df-uni 2499 df-int 2529 df-iun 2563 df-iin 2564 df-br 2615 df-opab 2662 df-tr 2676 df-eprel 2827 df-id 2830 df-po 2835 df-so 2845 df-fr 2912 df-we 2929 df-ord 2946 df-on 2947 df-lim 2948 df-suc 2949 df-om 3127 df-xp 3179 df-rel 3180 df-cnv 3181 df-co 3182 df-dm 3183 df-rn 3184 df-res 3185 df-ima 3186 df-fun 3187 df-fn 3188 df-f 3189 df-f1 3190 df-fo 3191 df-f1o 3192 df-fv 3193 df-rdg 3923 df-opr 3956 df-oprab 3957 df-1st 4069 df-2nd 4070 df-1o 4123 df-oadd 4125 df-omul 4126 df-er 4251 df-ec 4253 df-qs 4256 df-map 4314 df-en 4357 df-dom 4358 df-sdom 4359 df-sup 4554 df-r1 4623 df-rank 4624 df-ni 4980 df-pli 4981 df-mi 4982 df-lti 4983 df-plpq 5015 df-mpq 5016 df-enq 5017 df-nq 5018 df-plq 5019 df-mq 5020 df-rq 5021 df-ltq 5022 df-1q 5023 df-np 5066 df-1p 5067 df-plp 5068 df-mp 5069 df-ltp 5070 df-plpr 5144 df-mpr 5145 df-enr 5146 df-nr 5147 df-plr 5148 df-mr 5149 df-ltr 5150 df-0r 5151 df-1r 5152 df-m1r 5153 df-c 5220 df-0 5221 df-1 5222 df-i 5223 df-r 5224 df-plus 5225 df-mul 5226 df-lt 5227 df-sub 5336 df-neg 5338 df-pnf 5467 df-mnf 5468 df-xr 5469 df-ltxr 5470 df-le 5471 df-div 5680 df-n 5881 df-2 5925 df-3 5926 df-4 5927 df-n0 6055 df-z 6091 df-fl 6180 df-q 6202 df-seq1 6253 df-shft 6286 df-ioo 6306 df-uz 6358 df-fz 6408 df-seqz 6473 df-exp 6509 df-sqr 6608 df-re 6690 df-im 6691 df-cj 6692 df-abs 6693 df-clim 6921 df-sum 6926 df-top 7542 df-bases 7544 df-topgen 7545 df-cld 7613 df-ntr 7614 df-cls 7615 df-cn 7704 df-cnp 7705 df-haus 7732 df-met 7743 df-bl 7745 df-opn 7746 df-lm 7874 df-grp 7987 df-gid 7988 df-ginv 7989 df-gdiv 7990 df-abl 8051 df-vc 8117 df-nv 8163 df-va 8166 df-ba 8167 df-sm 8168 df-0v 8169 df-vs 8170 df-nm 8171 df-ims 8172 df-ip 8297 df-lno 8352 df-nmo 8353 df-0o 8355 df-ph 8416 df-hnorm 8776 df-hvsub 8779 df-hlim 8780 df-hcau 8781 df-sh 9015 df-ch 9031 df-oc 9063 df-ch0 9064 df-pj 9175 df-h0op 9614 df-iop 9615 df-nmop 9705 df-cnop 9706 df-lnop 9707 df-bdop 9708 df-unop 9709 df-hmop 9710 df-nmfn 9711 df-nlfn 9712 df-cnfn 9713 df-lnfn 9714 df-adjh 9715 |