| Step | Hyp | Ref
 | Expression | 
| 1 |   | exfzdc.1 | 
. . . . 5
              | 
| 2 |   | exfzdc.2 | 
. . . . 5
              | 
| 3 |   | eluz 9614 | 
. . . . 5
               
                 
        | 
| 4 | 1, 2, 3 | syl2anc 411 | 
. . . 4
                   
        | 
| 5 | 4 | biimpar 297 | 
. . 3
       
        
           | 
| 6 |   | simpl 109 | 
. . 3
       
        
   | 
| 7 |   | eluzfz2 10107 | 
. . . 4
              
           | 
| 8 |   | oveq2 5930 | 
. . . . . . . 8
                          | 
| 9 | 8 | rexeqdv 2700 | 
. . . . . . 7
              
                         | 
| 10 | 9 | dcbid 839 | 
. . . . . 6
            DECID     
        
DECID               | 
| 11 | 10 | imbi2d 230 | 
. . . . 5
              
 
DECID               
     DECID                | 
| 12 |   | oveq2 5930 | 
. . . . . . . 8
                          | 
| 13 | 12 | rexeqdv 2700 | 
. . . . . . 7
              
                         | 
| 14 | 13 | dcbid 839 | 
. . . . . 6
            DECID     
        
DECID               | 
| 15 | 14 | imbi2d 230 | 
. . . . 5
              
 
DECID               
     DECID                | 
| 16 |   | oveq2 5930 | 
. . . . . . . 8
                                      | 
| 17 | 16 | rexeqdv 2700 | 
. . . . . . 7
                    
                               | 
| 18 | 17 | dcbid 839 | 
. . . . . 6
                  DECID     
        
DECID                     | 
| 19 | 18 | imbi2d 230 | 
. . . . 5
                    
 
DECID               
     DECID                      | 
| 20 |   | oveq2 5930 | 
. . . . . . . 8
                          | 
| 21 | 20 | rexeqdv 2700 | 
. . . . . . 7
              
                         | 
| 22 | 21 | dcbid 839 | 
. . . . . 6
            DECID     
        
DECID               | 
| 23 | 22 | imbi2d 230 | 
. . . . 5
              
 
DECID               
     DECID                | 
| 24 |   | eluzfz1 10106 | 
. . . . . . . . 9
              
           | 
| 25 | 24 | adantl 277 | 
. . . . . . . 8
       
            
           | 
| 26 |   | exfzdc.3 | 
. . . . . . . . . 10
       
            
DECID    | 
| 27 | 26 | ralrimiva 2570 | 
. . . . . . . . 9
                 DECID    | 
| 28 | 27 | adantr 276 | 
. . . . . . . 8
       
            
          DECID    | 
| 29 |   | nfsbc1v 3008 | 
. . . . . . . . . 10
      
   ![].  ].](_drbrack.gif)   | 
| 30 | 29 | nfdc 1673 | 
. . . . . . . . 9
    DECID       ![].  ].](_drbrack.gif)   | 
| 31 |   | sbceq1a 2999 | 
. . . . . . . . . 10
                      ![].  ].](_drbrack.gif)     | 
| 32 | 31 | dcbid 839 | 
. . . . . . . . 9
            DECID     DECID       ![].  ].](_drbrack.gif)     | 
| 33 | 30, 32 | rspc 2862 | 
. . . . . . . 8
                  
       DECID     DECID       ![].  ].](_drbrack.gif)     | 
| 34 | 25, 28, 33 | sylc 62 | 
. . . . . . 7
       
            
DECID       ![].  ].](_drbrack.gif)    | 
| 35 | 1 | adantr 276 | 
. . . . . . . . . . 11
       
            
       | 
| 36 |   | fzsn 10141 | 
. . . . . . . . . . 11
                        | 
| 37 | 35, 36 | syl 14 | 
. . . . . . . . . 10
       
            
             | 
| 38 | 37 | rexeqdv 2700 | 
. . . . . . . . 9
       
            
     
        
            | 
| 39 |   | rexsns 3661 | 
. . . . . . . . 9
            
        ![].  ].](_drbrack.gif)    | 
| 40 | 38, 39 | bitrdi 196 | 
. . . . . . . 8
       
            
     
        
      ![].  ].](_drbrack.gif)     | 
| 41 | 40 | dcbid 839 | 
. . . . . . 7
       
            
 DECID
             
DECID       ![].  ].](_drbrack.gif)     | 
| 42 | 34, 41 | mpbird 167 | 
. . . . . 6
       
            
DECID              | 
| 43 | 42 | expcom 116 | 
. . . . 5
              
     DECID               | 
| 44 |   | simpr 110 | 
. . . . . . . . . 10
           ..^         
DECID               
DECID              | 
| 45 |   | fzofzp1 10303 | 
. . . . . . . . . . . . 13
         ..^    
                 | 
| 46 | 45 | ad2antrr 488 | 
. . . . . . . . . . . 12
           ..^         
DECID                                 | 
| 47 | 27 | ad2antlr 489 | 
. . . . . . . . . . . 12
           ..^         
DECID                          DECID    | 
| 48 |   | nfsbc1v 3008 | 
. . . . . . . . . . . . . 14
                ![].  ].](_drbrack.gif)   | 
| 49 | 48 | nfdc 1673 | 
. . . . . . . . . . . . 13
    DECID             ![].  ].](_drbrack.gif)   | 
| 50 |   | sbceq1a 2999 | 
. . . . . . . . . . . . . 14
                                  ![].  ].](_drbrack.gif)     | 
| 51 | 50 | dcbid 839 | 
. . . . . . . . . . . . 13
                  DECID     DECID             ![].  ].](_drbrack.gif)     | 
| 52 | 49, 51 | rspc 2862 | 
. . . . . . . . . . . 12
                        
       DECID     DECID             ![].  ].](_drbrack.gif)     | 
| 53 | 46, 47, 52 | sylc 62 | 
. . . . . . . . . . 11
           ..^         
DECID               
DECID             ![].  ].](_drbrack.gif)    | 
| 54 |   | rexsns 3661 | 
. . . . . . . . . . . 12
                    
            ![].  ].](_drbrack.gif)    | 
| 55 | 54 | dcbii 841 | 
. . . . . . . . . . 11
   DECID                   DECID             ![].  ].](_drbrack.gif)    | 
| 56 | 53, 55 | sylibr 134 | 
. . . . . . . . . 10
           ..^         
DECID               
DECID                  | 
| 57 |   | dcor 937 | 
. . . . . . . . . 10
   DECID                DECID     
            
DECID                    
              | 
| 58 | 44, 56, 57 | sylc 62 | 
. . . . . . . . 9
           ..^         
DECID               
DECID                    
             | 
| 59 |   | rexun 3343 | 
. . . . . . . . . 10
                              
     
                           | 
| 60 | 59 | dcbii 841 | 
. . . . . . . . 9
   DECID                             DECID                                  | 
| 61 | 58, 60 | sylibr 134 | 
. . . . . . . 8
           ..^         
DECID               
DECID                            | 
| 62 |   | elfzouz 10226 | 
. . . . . . . . . . . 12
         ..^    
           | 
| 63 | 62 | ad2antrr 488 | 
. . . . . . . . . . 11
           ..^         
DECID                           | 
| 64 |   | fzsuc 10144 | 
. . . . . . . . . . 11
              
                                   | 
| 65 | 63, 64 | syl 14 | 
. . . . . . . . . 10
           ..^         
DECID                                                   | 
| 66 | 65 | rexeqdv 2700 | 
. . . . . . . . 9
           ..^         
DECID                   
                                             | 
| 67 | 66 | dcbid 839 | 
. . . . . . . 8
           ..^         
DECID                 DECID     
              
DECID                             | 
| 68 | 61, 67 | mpbird 167 | 
. . . . . . 7
           ..^         
DECID               
DECID                    | 
| 69 | 68 | exp31 364 | 
. . . . . 6
         ..^    
      DECID              
DECID                      | 
| 70 | 69 | a2d 26 | 
. . . . 5
         ..^    
      DECID   
           
     DECID                      | 
| 71 | 11, 15, 19, 23, 43, 70 | fzind2 10315 | 
. . . 4
                    DECID   
           | 
| 72 | 7, 71 | syl 14 | 
. . 3
              
     DECID               | 
| 73 | 5, 6, 72 | sylc 62 | 
. 2
       
        
DECID              | 
| 74 |   | rex0 3468 | 
. . . . 5
        
    | 
| 75 |   | zltnle 9372 | 
. . . . . . . . 9
               
                   
    | 
| 76 | 2, 1, 75 | syl2anc 411 | 
. . . . . . . 8
                     
    | 
| 77 | 76 | biimpar 297 | 
. . . . . . 7
       
                  | 
| 78 |   | fzn 10117 | 
. . . . . . . . 9
               
                          | 
| 79 | 1, 2, 78 | syl2anc 411 | 
. . . . . . . 8
                            | 
| 80 | 79 | adantr 276 | 
. . . . . . 7
       
                   
            | 
| 81 | 77, 80 | mpbid 147 | 
. . . . . 6
       
                      | 
| 82 | 81 | rexeqdv 2700 | 
. . . . 5
       
              
                      | 
| 83 | 74, 82 | mtbiri 676 | 
. . . 4
       
                          | 
| 84 | 83 | olcd 735 | 
. . 3
       
              
                           | 
| 85 |   | df-dc 836 | 
. . 3
   DECID              
     
                         | 
| 86 | 84, 85 | sylibr 134 | 
. 2
       
          
DECID              | 
| 87 |   | zdcle 9402 | 
. . . 4
               
     DECID        | 
| 88 |   | exmiddc 837 | 
. . . 4
   DECID                 
          | 
| 89 | 87, 88 | syl 14 | 
. . 3
               
                        | 
| 90 | 1, 2, 89 | syl2anc 411 | 
. 2
                          | 
| 91 | 73, 86, 90 | mpjaodan 799 | 
1
       DECID              |