| Step | Hyp | Ref
| Expression |
| 1 | | sbc4rex 37353 |
. . . . . . . . 9
       ![]. ].](_drbrack.gif) 
             ![]. ].](_drbrack.gif)   |
| 2 | 1 | sbcbii 3491 |
. . . . . . . 8
       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif) 
         ![]. ].](_drbrack.gif)           ![]. ].](_drbrack.gif)   |
| 3 | | sbc4rex 37353 |
. . . . . . . 8
       ![]. ].](_drbrack.gif) 
         ![]. ].](_drbrack.gif)           ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)   |
| 4 | 2, 3 | bitri 264 |
. . . . . . 7
       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif) 
             ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)   |
| 5 | 4 | sbcbii 3491 |
. . . . . 6
         ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)    
        ![]. ].](_drbrack.gif)           ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)   |
| 6 | | sbc4rex 37353 |
. . . . . 6
         ![]. ].](_drbrack.gif) 
         ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)             ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)   |
| 7 | 5, 6 | bitri 264 |
. . . . 5
         ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)    
            ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)   |
| 8 | 7 | a1i 11 |
. . . 4
                ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)    
            ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)    |
| 9 | 8 | rabbiia 3185 |
. . 3
               ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)                         ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)   |
| 10 | | rexfrabdioph.2 |
. . . . . . 7
   |
| 11 | | rexfrabdioph.1 |
. . . . . . . . 9
   |
| 12 | | nn0p1nn 11332 |
. . . . . . . . 9

    |
| 13 | 11, 12 | syl5eqel 2705 |
. . . . . . . 8

  |
| 14 | 13 | peano2nnd 11037 |
. . . . . . 7

    |
| 15 | 10, 14 | syl5eqel 2705 |
. . . . . 6

  |
| 16 | 15 | nnnn0d 11351 |
. . . . 5

  |
| 17 | 16 | adantr 481 |
. . . 4
                 ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)  Dioph  
  |
| 18 | | sbcrot5 37356 |
. . . . . . . . . . . . 13
       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)   |
| 19 | 18 | sbcbii 3491 |
. . . . . . . . . . . 12
       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)   |
| 20 | | sbcrot5 37356 |
. . . . . . . . . . . 12
       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)   |
| 21 | 19, 20 | bitri 264 |
. . . . . . . . . . 11
       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)   |
| 22 | 21 | sbcbii 3491 |
. . . . . . . . . 10
         ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)
        ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)   |
| 23 | | sbcrot5 37356 |
. . . . . . . . . 10
         ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)
      ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)         ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)   |
| 24 | 22, 23 | bitri 264 |
. . . . . . . . 9
         ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)
      ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)         ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)   |
| 25 | 24 | sbcbii 3491 |
. . . . . . . 8
         ![]. ].](_drbrack.gif)         ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)
        ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)         ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)   |
| 26 | | reseq1 5390 |
. . . . . . . . . 10
                           |
| 27 | 26 | sbccomieg 37357 |
. . . . . . . . 9
         ![]. ].](_drbrack.gif)         ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)
  
           ![]. ].](_drbrack.gif)         ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)   |
| 28 | | fzssp1 12384 |
. . . . . . . . . . . . 13
       
   |
| 29 | 11 | oveq2i 6661 |
. . . . . . . . . . . . 13
       
   |
| 30 | 28, 29 | sseqtr4i 3638 |
. . . . . . . . . . . 12
         |
| 31 | | fzssp1 12384 |
. . . . . . . . . . . . 13
       
   |
| 32 | 10 | oveq2i 6661 |
. . . . . . . . . . . . 13
       
   |
| 33 | 31, 32 | sseqtr4i 3638 |
. . . . . . . . . . . 12
         |
| 34 | 30, 33 | sstri 3612 |
. . . . . . . . . . 11
         |
| 35 | | resabs1 5427 |
. . . . . . . . . . 11
                     
       |
| 36 | | dfsbcq 3437 |
. . . . . . . . . . 11
             
                    ![]. ].](_drbrack.gif)         ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)         ![]. ].](_drbrack.gif)         ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)    |
| 37 | 34, 35, 36 | mp2b 10 |
. . . . . . . . . 10
               ![]. ].](_drbrack.gif)         ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)
        ![]. ].](_drbrack.gif)         ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)   |
| 38 | | fveq1 6190 |
. . . . . . . . . . . . 13
                       |
| 39 | 38 | sbccomieg 37357 |
. . . . . . . . . . . 12
         ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)
  
         ![]. ].](_drbrack.gif)         ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)   |
| 40 | | elfz1end 12371 |
. . . . . . . . . . . . . . . 16

      |
| 41 | 13, 40 | sylib 208 |
. . . . . . . . . . . . . . 15

      |
| 42 | 33, 41 | sseldi 3601 |
. . . . . . . . . . . . . 14

      |
| 43 | | fvres 6207 |
. . . . . . . . . . . . . 14
                     |
| 44 | | dfsbcq 3437 |
. . . . . . . . . . . . . 14
              
             ![]. ].](_drbrack.gif)         ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)
      ![]. ].](_drbrack.gif)         ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)    |
| 45 | 42, 43, 44 | 3syl 18 |
. . . . . . . . . . . . 13

             ![]. ].](_drbrack.gif)         ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)
      ![]. ].](_drbrack.gif)         ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)    |
| 46 | | vex 3203 |
. . . . . . . . . . . . . . . . 17
 |
| 47 | 46 | resex 5443 |
. . . . . . . . . . . . . . . 16
       |
| 48 | | fveq1 6190 |
. . . . . . . . . . . . . . . . 17
                       |
| 49 | 48 | sbcco3g 3999 |
. . . . . . . . . . . . . . . 16
 
              ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)
  
         ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)    |
| 50 | 47, 49 | ax-mp 5 |
. . . . . . . . . . . . . . 15
         ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)
  
         ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)   |
| 51 | | elfz1end 12371 |
. . . . . . . . . . . . . . . . 17

      |
| 52 | 15, 51 | sylib 208 |
. . . . . . . . . . . . . . . 16

      |
| 53 | | fvres 6207 |
. . . . . . . . . . . . . . . 16
                     |
| 54 | | dfsbcq 3437 |
. . . . . . . . . . . . . . . 16
              
             ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)    |
| 55 | 52, 53, 54 | 3syl 18 |
. . . . . . . . . . . . . . 15

             ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)    |
| 56 | 50, 55 | syl5bb 272 |
. . . . . . . . . . . . . 14

         ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)
      ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)    |
| 57 | 56 | sbcbidv 3490 |
. . . . . . . . . . . . 13

       ![]. ].](_drbrack.gif)         ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)
      ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)    |
| 58 | 45, 57 | bitrd 268 |
. . . . . . . . . . . 12

             ![]. ].](_drbrack.gif)         ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)
      ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)    |
| 59 | 39, 58 | syl5bb 272 |
. . . . . . . . . . 11

         ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)
      ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)    |
| 60 | 59 | sbcbidv 3490 |
. . . . . . . . . 10

         ![]. ].](_drbrack.gif)         ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)
        ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)    |
| 61 | 37, 60 | syl5bb 272 |
. . . . . . . . 9

               ![]. ].](_drbrack.gif)         ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)
        ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)    |
| 62 | 27, 61 | syl5bb 272 |
. . . . . . . 8

         ![]. ].](_drbrack.gif)         ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)
        ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)    |
| 63 | 25, 62 | syl5bbr 274 |
. . . . . . 7

         ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)         ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)
        ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)    |
| 64 | 63 | rabbidv 3189 |
. . . . . 6

               ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)         ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)                 ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)    |
| 65 | 64 | eleq1d 2686 |
. . . . 5

                ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)         ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)  Dioph 
               ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)  Dioph     |
| 66 | 65 | biimpar 502 |
. . . 4
                 ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)  Dioph                  ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)         ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)  Dioph    |
| 67 | | rexfrabdioph.3 |
. . . . 5
   |
| 68 | | rexfrabdioph.4 |
. . . . 5
   |
| 69 | | rexfrabdioph.5 |
. . . . 5
   |
| 70 | | rexfrabdioph.6 |
. . . . 5
   |
| 71 | 67, 68, 69, 70 | 4rexfrabdioph 37362 |
. . . 4
                 ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)         ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)  Dioph                      ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)  Dioph    |
| 72 | 17, 66, 71 | syl2anc 693 |
. . 3
                 ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)  Dioph                      ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)  Dioph    |
| 73 | 9, 72 | syl5eqel 2705 |
. 2
                 ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)  Dioph                  ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)      Dioph    |
| 74 | 11, 10 | 2rexfrabdioph 37360 |
. 2
                 ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)      Dioph   
             Dioph    |
| 75 | 73, 74 | syldan 487 |
1
                 ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)       ![]. ].](_drbrack.gif)  Dioph   
             Dioph    |