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| 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 |
|
| pjclem1.2 |
|
| Ref | Expression |
|---|---|
| pjcmmul1i |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | pjclem1.1 |
. . . 4
| |
| 2 | pjclem1.2 |
. . . 4
| |
| 3 | 1, 2 | pjclem4 11564 |
. . 3
|
| 4 | pjmfn 11087 |
. . . 4
| |
| 5 | 1, 2 | chincli 10808 |
. . . 4
|
| 6 | fnfvelrn 4597 |
. . . 4
| |
| 7 | 4, 5, 6 | mp2an 758 |
. . 3
|
| 8 | 3, 7 | syl6eqel 1816 |
. 2
|
| 9 | pjadj2 11551 |
. . 3
| |
| 10 | 1 | pjbdlni 11512 |
. . . . 5
|
| 11 | 2 | pjbdlni 11512 |
. . . . 5
|
| 12 | 10, 11 | adjcoi 11462 |
. . . 4
|
| 13 | pjadj3 11552 |
. . . . . 6
| |
| 14 | 2, 13 | ax-mp 7 |
. . . . 5
|
| 15 | 14 | coeq1i 3936 |
. . . 4
|
| 16 | pjadj3 11552 |
. . . . . 6
| |
| 17 | 1, 16 | ax-mp 7 |
. . . . 5
|
| 18 | 17 | coeq2i 3937 |
. . . 4
|
| 19 | 12, 15, 18 | 3eqtri 1749 |
. . 3
|
| 20 | 9, 19 | syl5reqr 1780 |
. 2
|
| 21 | 8, 20 | impbii 173 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: pjcmmul2i 11567 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-5 1140 ax-7 1142 ax-gen 1143 ax-8 1144 ax-9 1145 ax-10 1146 ax-11 1147 ax-12 1148 ax-13 1149 ax-14 1150 ax-17 1155 ax-4 1157 ax-5o 1159 ax-6o 1162 ax-9o 1319 ax-10o 1338 ax-16 1418 ax-11o 1426 ax-ext 1702 ax-rep 3243 ax-sep 3253 ax-nul 3260 ax-pow 3296 ax-pr 3339 ax-un 3601 ax-reg 5505 ax-inf2 5540 ax-ac 5702 ax-hilex 10293 ax-hfvadd 10294 ax-hvcom 10295 ax-hvass 10296 ax-hv0cl 10297 ax-hvaddid 10298 ax-hfvmul 10299 ax-hvmulid 10300 ax-hvmulass 10301 ax-hvdistr1 10302 ax-hvdistr2 10303 ax-hvmul0 10304 ax-hfi 10371 ax-his1 10374 ax-his2 10375 ax-his3 10376 ax-his4 10377 ax-hcompl 10496 |
| This theorem depends on definitions: df-bi 163 df-or 240 df-an 241 df-3or 856 df-3an 857 df-ex 1165 df-sb 1374 df-eu 1613 df-mo 1614 df-clab 1709 df-cleq 1714 df-clel 1717 df-ne 1856 df-nel 1857 df-ral 1943 df-rex 1944 df-reu 1945 df-rab 1946 df-v 2127 df-sbc 2287 df-csb 2374 df-dif 2430 df-un 2433 df-in 2436 df-ss 2438 df-pss 2440 df-nul 2702 df-if 2807 df-pw 2859 df-sn 2873 df-pr 2874 df-tp 2876 df-op 2877 df-uni 3000 df-int 3037 df-iun 3079 df-iin 3080 df-br 3159 df-opab 3214 df-tr 3230 df-eprel 3398 df-id 3401 df-po 3406 df-so 3419 df-fr 3440 df-we 3459 df-ord 3475 df-on 3476 df-lim 3477 df-suc 3478 df-om 3761 df-xp 3811 df-rel 3812 df-cnv 3813 df-co 3814 df-dm 3815 df-rn 3816 df-res 3817 df-ima 3818 df-fun 3819 df-fn 3820 df-f 3821 df-f1 3822 df-fo 3823 df-f1o 3824 df-fv 3825 df-opr 4697 df-oprab 4698 df-mpt 4817 df-1st 4831 df-2nd 4832 df-iota 4900 df-rdg 4951 df-1o 4988 df-oadd 4990 df-omul 4991 df-er 5129 df-ec 5131 df-qs 5134 df-map 5194 df-en 5238 df-dom 5239 df-sdom 5240 df-undef 5367 df-riota 5371 df-sup 5474 df-r1 5559 df-rank 5560 df-ni 5948 df-pli 5949 df-mi 5950 df-lti 5951 df-plpq 5983 df-mpq 5984 df-enq 5985 df-nq 5986 df-plq 5987 df-mq 5988 df-rq 5989 df-ltq 5990 df-1q 5991 df-np 6034 df-1p 6035 df-plp 6036 df-mp 6037 df-ltp 6038 df-plpr 6112 df-mpr 6113 df-enr 6114 df-nr 6115 df-plr 6116 df-mr 6117 df-ltr 6118 df-0r 6119 df-1r 6120 df-m1r 6121 df-c 6188 df-0 6189 df-1 6190 df-i 6191 df-r 6192 df-plus 6193 df-mul 6194 df-lt 6195 df-sub 6307 df-neg 6309 df-pnf 6450 df-mnf 6451 df-xr 6452 df-ltxr 6453 df-le 6454 df-div 6688 df-n 6903 df-2 6949 df-3 6950 df-4 6951 df-n0 7104 df-z 7140 df-q 7231 df-fl 7258 df-ioo 7323 df-uz 7382 df-fz 7433 df-seq1 7516 df-shft 7549 df-seqz 7571 df-exp 7607 df-sqr 7715 df-re 7796 df-im 7797 df-cj 7798 df-abs 7799 df-clim 8030 df-sum 8035 df-top 8656 df-bases 8658 df-topgen 8659 df-cld 8734 df-ntr 8735 df-cls 8736 df-cn 8825 df-cnp 8826 df-haus 8854 df-met 8865 df-bl 8867 df-opn 8868 df-lm 8995 df-grp 9111 df-gid 9112 df-ginv 9113 df-gdiv 9114 df-abl 9203 df-vc 9292 df-nv 9338 df-va 9341 df-ba 9342 df-sm 9343 df-0v 9344 df-vs 9345 df-nm 9346 df-ims 9347 df-ip 9484 df-lno 9539 df-nmo 9540 df-0o 9542 df-ph 9608 df-hnorm 10261 df-hvsub 10264 df-hlim 10265 df-hcau 10266 df-sh 10501 df-ch 10517 df-oc 10549 df-ch0 10550 df-pj 10662 df-h0op 11103 df-iop 11104 df-nmop 11194 df-cnop 11195 df-lnop 11196 df-bdop 11197 df-unop 11198 df-hmop 11199 df-nmfn 11200 df-nlfn 11201 df-cnfn 11202 df-lnfn 11203 df-adjh 11204 |