Proof of Theorem ipasslem2
| Step | Hyp | Ref
| Expression |
| 1 | | ax1cn 5269 |
. . . . . . . . . . . . 13
 |
| 2 | | mulneg2t 5452 |
. . . . . . . . . . . . 13
           |
| 3 | 1, 2 | mpan2 696 |
. . . . . . . . . . . 12

        |
| 4 | | ax1id 5282 |
. . . . . . . . . . . . 13

    |
| 5 | 4 | negeqd 5361 |
. . . . . . . . . . . 12

      |
| 6 | 3, 5 | eqtr2d 1508 |
. . . . . . . . . . 11

      |
| 7 | 6 | adantr 389 |
. . . . . . . . . 10
         |
| 8 | 7 | opreq1d 3975 |
. . . . . . . . 9
                 |
| 9 | 1 | negcl 5369 |
. . . . . . . . . 10
  |
| 10 | | ip1i.9 |
. . . . . . . . . . . 12
CPreHil |
| 11 | 10 | phnvi 8475 |
. . . . . . . . . . 11
NrmCVec |
| 12 | | ip1i.1 |
. . . . . . . . . . . 12
Base   |
| 13 | | ip1i.4 |
. . . . . . . . . . . 12
     |
| 14 | 12, 13 | nvsass 8249 |
. . . . . . . . . . 11
  NrmCVec 

                    |
| 15 | 11, 14 | mpan 695 |
. . . . . . . . . 10
                      |
| 16 | 9, 15 | mp3an2 904 |
. . . . . . . . 9
                     |
| 17 | 8, 16 | eqtrd 1507 |
. . . . . . . 8
                   |
| 18 | | nn0cnt 6109 |
. . . . . . . 8

  |
| 19 | 17, 18 | sylan 448 |
. . . . . . 7
 

                |
| 20 | 19 | opreq1d 3975 |
. . . . . 6
 

                        |
| 21 | | ip1i.2 |
. . . . . . . 8
     |
| 22 | | ip1i.7 |
. . . . . . . 8
     |
| 23 | | ipasslem1.b |
. . . . . . . 8
 |
| 24 | 12, 21, 13, 22, 10, 23 | ipasslem1 8490 |
. . . . . . 7
                                  |
| 25 | 12, 13 | nvscl 8247 |
. . . . . . . 8
  NrmCVec 
        |
| 26 | 11, 9, 25 | mp3an12 906 |
. . . . . . 7

       |
| 27 | 24, 26 | sylan2 451 |
. . . . . 6
 

                          |
| 28 | 20, 27 | eqtrd 1507 |
. . . . 5
 

                      |
| 29 | 28 | opreq2d 3976 |
. . . 4
 

  
                 
                   |
| 30 | | negsubt 5382 |
. . . . 5
                                            
                   |
| 31 | | axmulcl 5273 |
. . . . . 6
         
       |
| 32 | | negclt 5368 |
. . . . . . 7

   |
| 33 | 18, 32 | syl 10 |
. . . . . 6

   |
| 34 | 12, 22 | ipcl 8365 |
. . . . . . 7
  NrmCVec
       |
| 35 | 11, 23, 34 | mp3an13 907 |
. . . . . 6

      |
| 36 | 31, 33, 35 | syl2an 454 |
. . . . 5
 

 
       |
| 37 | | axmulcl 5273 |
. . . . . 6
            
            |
| 38 | 12, 22 | ipcl 8365 |
. . . . . . . 8
  NrmCVec     
            |
| 39 | 11, 23, 38 | mp3an13 907 |
. . . . . . 7
                 |
| 40 | 26, 39 | syl 10 |
. . . . . 6

           |
| 41 | 37, 18, 40 | syl2an 454 |
. . . . 5
 

             |
| 42 | 30, 36, 41 | sylanc 471 |
. . . 4
 

  
      
                                 |
| 43 | | axdistr 5279 |
. . . . . 6
                                                          |
| 44 | 33 | adantr 389 |
. . . . . 6
 

   |
| 45 | 35 | adantl 388 |
. . . . . 6
 

      |
| 46 | 40 | adantl 388 |
. . . . . 6
 

           |
| 47 | 43, 44, 45, 46 | syl3anc 858 |
. . . . 5
 

 
                  
      
             |
| 48 | 12, 21, 13, 22, 10 | ipdiri 8489 |
. . . . . . . . . 10
                                      |
| 49 | 23, 48 | mp3an3 905 |
. . . . . . . . 9
                                      |
| 50 | 26, 49 | mpdan 704 |
. . . . . . . 8

                              |
| 51 | | eqid 1475 |
. . . . . . . . . . . 12
         |
| 52 | 12, 21, 13, 51 | nvrinv 8273 |
. . . . . . . . . . 11
  NrmCVec                 |
| 53 | 11, 52 | mpan 695 |
. . . . . . . . . 10

               |
| 54 | 53 | opreq1d 3975 |
. . . . . . . . 9

                       |
| 55 | 12, 51, 22 | ip0l 8371 |
. . . . . . . . . 10
  NrmCVec            |
| 56 | 11, 23, 55 | mp2an 697 |
. . . . . . . . 9
         |
| 57 | 54, 56 | syl6eq 1523 |
. . . . . . . 8

               |
| 58 | 50, 57 | eqtr3d 1509 |
. . . . . . 7

                 |
| 59 | 58 | opreq2d 3976 |
. . . . . 6

                   
   |
| 60 | | mul01t 5443 |
. . . . . . 7
 
     |
| 61 | 33, 60 | syl 10 |
. . . . . 6

     |
| 62 | 59, 61 | sylan9eqr 1529 |
. . . . 5
 

 
                  |
| 63 | | mulneg1t 5451 |
. . . . . . 7
             
                        |
| 64 | 63, 18, 40 | syl2an 454 |
. . . . . 6
 

 
           
            |
| 65 | 64 | opreq2d 3976 |
. . . . 5
 

  
      
                                  |
| 66 | 47, 62, 65 | 3eqtr3rd 1516 |
. . . 4
 

  
      
             |
| 67 | 29, 42, 66 | 3eqtr2d 1513 |
. . 3
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