Proof of Theorem ipdirilem
| Step | Hyp | Ref
| Expression |
| 1 | | 2cn 11091 |
. . . . . . 7
 |
| 2 | | 2ne0 11113 |
. . . . . . 7
 |
| 3 | 1, 2 | recidi 10756 |
. . . . . 6
     |
| 4 | 3 | oveq1i 6660 |
. . . . 5
                     |
| 5 | | ip1i.9 |
. . . . . . 7
  |
| 6 | 5 | phnvi 27671 |
. . . . . 6
 |
| 7 | | halfcn 11247 |
. . . . . . 7
   |
| 8 | | ipdiri.8 |
. . . . . . . 8
 |
| 9 | | ipdiri.9 |
. . . . . . . 8
 |
| 10 | | ip1i.1 |
. . . . . . . . 9
     |
| 11 | | ip1i.2 |
. . . . . . . . 9
     |
| 12 | 10, 11 | nvgcl 27475 |
. . . . . . . 8
 
       |
| 13 | 6, 8, 9, 12 | mp3an 1424 |
. . . . . . 7
     |
| 14 | 1, 7, 13 | 3pm3.2i 1239 |
. . . . . 6
         |
| 15 | | ip1i.4 |
. . . . . . 7
      |
| 16 | 10, 15 | nvsass 27483 |
. . . . . 6
                                       |
| 17 | 6, 14, 16 | mp2an 708 |
. . . . 5
                           |
| 18 | 10, 15 | nvsid 27482 |
. . . . . 6
                     |
| 19 | 6, 13, 18 | mp2an 708 |
. . . . 5
             |
| 20 | 4, 17, 19 | 3eqtr3i 2652 |
. . . 4
                   |
| 21 | 20 | oveq1i 6660 |
. . 3
                           |
| 22 | | ip1i.7 |
. . . 4
      |
| 23 | 10, 15 | nvscl 27481 |
. . . . 5
                     |
| 24 | 6, 7, 13, 23 | mp3an 1424 |
. . . 4
           |
| 25 | | ipdiri.10 |
. . . 4
 |
| 26 | 10, 11, 15, 22, 5, 24, 25 | ip2i 27683 |
. . 3
                                   |
| 27 | 21, 26 | eqtr3i 2646 |
. 2
                         |
| 28 | | neg1cn 11124 |
. . . . . 6
  |
| 29 | 10, 15 | nvscl 27481 |
. . . . . 6
           |
| 30 | 6, 28, 9, 29 | mp3an 1424 |
. . . . 5
      |
| 31 | 10, 11 | nvgcl 27475 |
. . . . 5
 
                 |
| 32 | 6, 8, 30, 31 | mp3an 1424 |
. . . 4
          |
| 33 | 10, 15 | nvscl 27481 |
. . . 4
                               |
| 34 | 6, 7, 32, 33 | mp3an 1424 |
. . 3
                |
| 35 | 10, 11, 15, 22, 5, 24, 34, 25 | ip1i 27682 |
. 2
                                                                                          |
| 36 | | eqid 2622 |
. . . . . . . . . . . 12
         |
| 37 | 36 | nvvc 27470 |
. . . . . . . . . . 11
        |
| 38 | 6, 37 | ax-mp 5 |
. . . . . . . . . 10
      |
| 39 | 11 | vafval 27458 |
. . . . . . . . . . 11
         |
| 40 | 39 | vcablo 27424 |
. . . . . . . . . 10
        |
| 41 | 38, 40 | ax-mp 5 |
. . . . . . . . 9
 |
| 42 | 8, 9 | pm3.2i 471 |
. . . . . . . . 9
   |
| 43 | 8, 30 | pm3.2i 471 |
. . . . . . . . 9
        |
| 44 | 10, 11 | bafval 27459 |
. . . . . . . . . 10
 |
| 45 | 44 | ablo4 27404 |
. . . . . . . . 9
  
                                             |
| 46 | 41, 42, 43, 45 | mp3an 1424 |
. . . . . . . 8
                                   |
| 47 | 15 | smfval 27460 |
. . . . . . . . . . 11
         |
| 48 | 39, 47, 44 | vc2OLD 27423 |
. . . . . . . . . 10
                  |
| 49 | 38, 8, 48 | mp2an 708 |
. . . . . . . . 9
         |
| 50 | | eqid 2622 |
. . . . . . . . . . 11
         |
| 51 | 10, 11, 15, 50 | nvrinv 27506 |
. . . . . . . . . 10
                  |
| 52 | 6, 9, 51 | mp2an 708 |
. . . . . . . . 9
              |
| 53 | 49, 52 | oveq12i 6662 |
. . . . . . . 8
                              |
| 54 | 10, 15 | nvscl 27481 |
. . . . . . . . . 10
         |
| 55 | 6, 1, 8, 54 | mp3an 1424 |
. . . . . . . . 9
     |
| 56 | 10, 11, 50 | nv0rid 27490 |
. . . . . . . . 9
                         |
| 57 | 6, 55, 56 | mp2an 708 |
. . . . . . . 8
                 |
| 58 | 46, 53, 57 | 3eqtri 2648 |
. . . . . . 7
                      |
| 59 | 58 | oveq2i 6661 |
. . . . . 6
                                  |
| 60 | 7, 1, 8 | 3pm3.2i 1239 |
. . . . . . 7
     |
| 61 | 10, 15 | nvsass 27483 |
. . . . . . 7
    
                      |
| 62 | 6, 60, 61 | mp2an 708 |
. . . . . 6
                   |
| 63 | 59, 62 | eqtr4i 2647 |
. . . . 5
                                |
| 64 | 7, 13, 32 | 3pm3.2i 1239 |
. . . . . 6
                  |
| 65 | 10, 11, 15 | nvdi 27485 |
. . . . . 6
                                                                          |
| 66 | 6, 64, 65 | mp2an 708 |
. . . . 5
                                                     |
| 67 | | ax-1cn 9994 |
. . . . . . . 8
 |
| 68 | 67, 1, 2 | divcan1i 10769 |
. . . . . . 7
     |
| 69 | 68 | oveq1i 6660 |
. . . . . 6
             |
| 70 | 10, 15 | nvsid 27482 |
. . . . . . 7
         |
| 71 | 6, 8, 70 | mp2an 708 |
. . . . . 6
     |
| 72 | 69, 71 | eqtri 2644 |
. . . . 5
         |
| 73 | 63, 66, 72 | 3eqtr3i 2652 |
. . . 4
                              |
| 74 | 73 | oveq1i 6660 |
. . 3
                                      |
| 75 | 28, 7 | mulcomi 10046 |
. . . . . . . . 9
           |
| 76 | 75 | oveq1i 6660 |
. . . . . . . 8
                                     |
| 77 | 28, 7, 32 | 3pm3.2i 1239 |
. . . . . . . . 9
               |
| 78 | 10, 15 | nvsass 27483 |
. . . . . . . . 9
                
                                        |
| 79 | 6, 77, 78 | mp2an 708 |
. . . . . . . 8
                                       |
| 80 | 7, 28, 32 | 3pm3.2i 1239 |
. . . . . . . . . 10
               |
| 81 | 10, 15 | nvsass 27483 |
. . . . . . . . . 10
                
                                        |
| 82 | 6, 80, 81 | mp2an 708 |
. . . . . . . . 9
                                       |
| 83 | 28, 8, 30 | 3pm3.2i 1239 |
. . . . . . . . . . . 12
 
       |
| 84 | 10, 11, 15 | nvdi 27485 |
. . . . . . . . . . . 12
   
      
                                   |
| 85 | 6, 83, 84 | mp2an 708 |
. . . . . . . . . . 11
                                  |
| 86 | | neg1mulneg1e1 11245 |
. . . . . . . . . . . . . 14
     |
| 87 | 86 | oveq1i 6660 |
. . . . . . . . . . . . 13
             |
| 88 | 28, 28, 9 | 3pm3.2i 1239 |
. . . . . . . . . . . . . 14
  
  |
| 89 | 10, 15 | nvsass 27483 |
. . . . . . . . . . . . . 14
    
 
                    |
| 90 | 6, 88, 89 | mp2an 708 |
. . . . . . . . . . . . 13
                   |
| 91 | 10, 15 | nvsid 27482 |
. . . . . . . . . . . . . 14
         |
| 92 | 6, 9, 91 | mp2an 708 |
. . . . . . . . . . . . 13
     |
| 93 | 87, 90, 92 | 3eqtr3i 2652 |
. . . . . . . . . . . 12
           |
| 94 | 93 | oveq2i 6661 |
. . . . . . . . . . 11
                             |
| 95 | 85, 94 | eqtri 2644 |
. . . . . . . . . 10
                        |
| 96 | 95 | oveq2i 6661 |
. . . . . . . . 9
                                    |
| 97 | 82, 96 | eqtri 2644 |
. . . . . . . 8
                                  |
| 98 | 76, 79, 97 | 3eqtr3i 2652 |
. . . . . . 7
                                    |
| 99 | 98 | oveq2i 6661 |
. . . . . 6
                                                                |
| 100 | 10, 15 | nvscl 27481 |
. . . . . . . . . 10
           |
| 101 | 6, 28, 8, 100 | mp3an 1424 |
. . . . . . . . 9
      |
| 102 | 10, 11 | nvgcl 27475 |
. . . . . . . . 9
                   |
| 103 | 6, 101, 9, 102 | mp3an 1424 |
. . . . . . . 8
          |
| 104 | 7, 13, 103 | 3pm3.2i 1239 |
. . . . . . 7
                  |
| 105 | 10, 11, 15 | nvdi 27485 |
. . . . . . 7
                                                                          |
| 106 | 6, 104, 105 | mp2an 708 |
. . . . . 6
                                                     |
| 107 | 99, 106 | eqtr4i 2647 |
. . . . 5
                                                          |
| 108 | 101, 9 | pm3.2i 471 |
. . . . . . . . 9
     
  |
| 109 | 44 | ablo4 27404 |
. . . . . . . . 9
  
      
                                      |
| 110 | 41, 42, 108, 109 | mp3an 1424 |
. . . . . . . 8
                                   |
| 111 | 10, 11, 15, 50 | nvrinv 27506 |
. . . . . . . . . . 11
                  |
| 112 | 6, 8, 111 | mp2an 708 |
. . . . . . . . . 10
              |
| 113 | 112 | oveq1i 6660 |
. . . . . . . . 9
                              |
| 114 | 10, 11 | nvgcl 27475 |
. . . . . . . . . . 11
 
       |
| 115 | 6, 9, 9, 114 | mp3an 1424 |
. . . . . . . . . 10
     |
| 116 | 10, 11, 50 | nv0lid 27491 |
. . . . . . . . . 10
                         |
| 117 | 6, 115, 116 | mp2an 708 |
. . . . . . . . 9
                 |
| 118 | 113, 117 | eqtri 2644 |
. . . . . . . 8
                      |
| 119 | 39, 47, 44 | vc2OLD 27423 |
. . . . . . . . 9
                  |
| 120 | 38, 9, 119 | mp2an 708 |
. . . . . . . 8
         |
| 121 | 110, 118,
120 | 3eqtri 2648 |
. . . . . . 7
                      |
| 122 | 121 | oveq2i 6661 |
. . . . . 6
                                  |
| 123 | 7, 1, 9 | 3pm3.2i 1239 |
. . . . . . 7
     |
| 124 | 10, 15 | nvsass 27483 |
. . . . . . 7
    
                      |
| 125 | 6, 123, 124 | mp2an 708 |
. . . . . 6
                   |
| 126 | 68 | oveq1i 6660 |
. . . . . 6
             |
| 127 | 122, 125,
126 | 3eqtr2i 2650 |
. . . . 5
                            |
| 128 | 107, 127,
92 | 3eqtri 2648 |
. . . 4
                                   |
| 129 | 128 | oveq1i 6660 |
. . 3
                                           |
| 130 | 74, 129 | oveq12i 6662 |
. 2
                                                                                    |
| 131 | 27, 35, 130 | 3eqtr2i 2650 |
1
                   |