| Step | Hyp | Ref
 | Expression | 
| 1 |   | dvadd.bg | 
. . . 4
                  | 
| 2 |   | eqid 2196 | 
. . . . 5
     ↾t         ↾t    | 
| 3 |   | dvaddcntop.j | 
. . . . 5
                   | 
| 4 |   | eqid 2196 | 
. . . . 5
                  #                                                     #                                   | 
| 5 |   | dvaddbr.s | 
. . . . 5
          
   | 
| 6 |   | dvaddxx.g | 
. . . . 5
              | 
| 7 |   | dvadd.x | 
. . . . 5
          
   | 
| 8 | 2, 3, 4, 5, 6, 7 | eldvap 14918 | 
. . . 4
                                ↾t                               #
                                  lim        | 
| 9 | 1, 8 | mpbid 147 | 
. . 3
                   ↾t                               #
                                  lim       | 
| 10 | 9 | simpld 112 | 
. 2
                  ↾t         | 
| 11 |   | dvadd.f | 
. . . . 5
              | 
| 12 | 7, 5 | sstrd 3193 | 
. . . . 5
          
   | 
| 13 | 3 | cntoptopon 14768 | 
. . . . . . . . 9
       TopOn    | 
| 14 |   | resttopon 14407 | 
. . . . . . . . 9
         TopOn   
        
     ↾t       TopOn     | 
| 15 | 13, 5, 14 | sylancr 414 | 
. . . . . . . 8
         
↾t       TopOn     | 
| 16 |   | topontop 14250 | 
. . . . . . . 8
      ↾t       TopOn         ↾t         | 
| 17 | 15, 16 | syl 14 | 
. . . . . . 7
         
↾t         | 
| 18 |   | toponuni 14251 | 
. . . . . . . . 9
      ↾t       TopOn              ↾t     | 
| 19 | 15, 18 | syl 14 | 
. . . . . . . 8
               ↾t     | 
| 20 | 7, 19 | sseqtrd 3221 | 
. . . . . . 7
          
    ↾t     | 
| 21 |   | eqid 2196 | 
. . . . . . . 8
      ↾t         
↾t    | 
| 22 | 21 | ntrss2 14357 | 
. . . . . . 7
      
↾t             
    ↾t              ↾t             | 
| 23 | 17, 20, 22 | syl2anc 411 | 
. . . . . 6
              ↾t             | 
| 24 |   | dvadd.bf | 
. . . . . . . 8
                  | 
| 25 |   | eqid 2196 | 
. . . . . . . . 9
                  #                                                     #                                   | 
| 26 | 2, 3, 25, 5, 11, 7 | eldvap 14918 | 
. . . . . . . 8
                                ↾t                               #
                                  lim        | 
| 27 | 24, 26 | mpbid 147 | 
. . . . . . 7
                   ↾t                               #
                                  lim       | 
| 28 | 27 | simpld 112 | 
. . . . . 6
                  ↾t         | 
| 29 | 23, 28 | sseldd 3184 | 
. . . . 5
              | 
| 30 | 11, 12, 29 | dvlemap 14916 | 
. . . 4
       
               #                                        | 
| 31 | 6, 12, 29 | dvlemap 14916 | 
. . . 4
       
               #                                        | 
| 32 |   | ssidd 3204 | 
. . . 4
          
   | 
| 33 |   | txtopon 14498 | 
. . . . . 6
         TopOn   
       TopOn      
           TopOn           | 
| 34 | 13, 13, 33 | mp2an 426 | 
. . . . 5
             TopOn          | 
| 35 | 34 | toponrestid 14257 | 
. . . 4
                    
↾t          | 
| 36 | 27 | simprd 114 | 
. . . 4
                       
    #   
                               lim      | 
| 37 | 9 | simprd 114 | 
. . . 4
                       
    #   
                               lim      | 
| 38 | 3 | addcncntop 14798 | 
. . . . 5
                    | 
| 39 | 5, 11, 7 | dvcl 14919 | 
. . . . . . 7
       
            
       | 
| 40 | 24, 39 | mpdan 421 | 
. . . . . 6
              | 
| 41 | 5, 6, 7 | dvcl 14919 | 
. . . . . . 7
       
            
       | 
| 42 | 1, 41 | mpdan 421 | 
. . . . . 6
              | 
| 43 | 40, 42 | opelxpd 4696 | 
. . . . 5
                         | 
| 44 | 34 | toponunii 14253 | 
. . . . . 6
                     | 
| 45 | 44 | cncnpi 14464 | 
. . . . 5
                            
                                            | 
| 46 | 38, 43, 45 | sylancr 414 | 
. . . 4
                      
            | 
| 47 | 30, 31, 32, 32, 3, 35, 36, 37, 46 | limccnp2cntop 14913 | 
. . 3
                             
    #   
                                                               lim      | 
| 48 |   | elrabi 2917 | 
. . . . . . . . . . 11
                  #             | 
| 49 | 48 | adantl 277 | 
. . . . . . . . . 10
       
               #              | 
| 50 | 11 | ffnd 5408 | 
. . . . . . . . . . . 12
              | 
| 51 | 50 | adantr 276 | 
. . . . . . . . . . 11
       
               #          
   | 
| 52 | 6 | ffnd 5408 | 
. . . . . . . . . . . 12
              | 
| 53 | 52 | adantr 276 | 
. . . . . . . . . . 11
       
               #          
   | 
| 54 |   | cnex 8003 | 
. . . . . . . . . . . . 13
        | 
| 55 |   | ssexg 4172 | 
. . . . . . . . . . . . 13
       
                    | 
| 56 | 12, 54, 55 | sylancl 413 | 
. . . . . . . . . . . 12
              | 
| 57 | 56 | adantr 276 | 
. . . . . . . . . . 11
       
               #          
   | 
| 58 |   | inidm 3372 | 
. . . . . . . . . . 11
              | 
| 59 |   | eqidd 2197 | 
. . . . . . . . . . 11
                        #
     
                        | 
| 60 |   | eqidd 2197 | 
. . . . . . . . . . 11
                        #
     
                        | 
| 61 | 11 | adantr 276 | 
. . . . . . . . . . . . 13
       
               #              | 
| 62 | 61 | ffvelcdmda 5697 | 
. . . . . . . . . . . 12
                        #
     
                    | 
| 63 | 6 | adantr 276 | 
. . . . . . . . . . . . 13
       
               #              | 
| 64 | 63 | ffvelcdmda 5697 | 
. . . . . . . . . . . 12
                        #
     
                    | 
| 65 | 62, 64 | addcld 8046 | 
. . . . . . . . . . 11
                        #
     
                              | 
| 66 | 51, 53, 57, 57, 58, 59, 60, 65 | ofvalg 6145 | 
. . . . . . . . . 10
                        #
     
                                           | 
| 67 | 49, 66 | mpdan 421 | 
. . . . . . . . 9
       
               #               
                         | 
| 68 |   | eqidd 2197 | 
. . . . . . . . . . 11
                        #
     
                        | 
| 69 |   | eqidd 2197 | 
. . . . . . . . . . 11
                        #
     
                        | 
| 70 | 61 | ffvelcdmda 5697 | 
. . . . . . . . . . . 12
                        #
     
                    | 
| 71 | 63 | ffvelcdmda 5697 | 
. . . . . . . . . . . 12
                        #
     
                    | 
| 72 | 70, 71 | addcld 8046 | 
. . . . . . . . . . 11
                        #
     
                              | 
| 73 | 51, 53, 57, 57, 58, 68, 69, 72 | ofvalg 6145 | 
. . . . . . . . . 10
                        #
     
                                           | 
| 74 | 29, 73 | mpidan 423 | 
. . . . . . . . 9
       
               #               
                         | 
| 75 | 67, 74 | oveq12d 5940 | 
. . . . . . . 8
       
               #                                                                                | 
| 76 |   | ffvelcdm 5695 | 
. . . . . . . . . 10
               
                | 
| 77 | 11, 48, 76 | syl2an 289 | 
. . . . . . . . 9
       
               #                  | 
| 78 | 63, 49 | ffvelcdmd 5698 | 
. . . . . . . . 9
       
               #                  | 
| 79 | 11, 29 | ffvelcdmd 5698 | 
. . . . . . . . . 10
                  | 
| 80 | 79 | adantr 276 | 
. . . . . . . . 9
       
               #                  | 
| 81 | 6, 29 | ffvelcdmd 5698 | 
. . . . . . . . . 10
                  | 
| 82 | 81 | adantr 276 | 
. . . . . . . . 9
       
               #                  | 
| 83 | 77, 78, 80, 82 | addsub4d 8384 | 
. . . . . . . 8
       
               #                                                                                  | 
| 84 | 75, 83 | eqtrd 2229 | 
. . . . . . 7
       
               #                                                                                | 
| 85 | 84 | oveq1d 5937 | 
. . . . . 6
       
               #                                                                                                        | 
| 86 | 61, 49 | ffvelcdmd 5698 | 
. . . . . . . 8
       
               #                  | 
| 87 | 86, 80 | subcld 8337 | 
. . . . . . 7
       
               #                            | 
| 88 | 78, 82 | subcld 8337 | 
. . . . . . 7
       
               #                            | 
| 89 |   | ssrab2 3268 | 
. . . . . . . . . 10
        
    #   
    | 
| 90 | 89, 12 | sstrid 3194 | 
. . . . . . . . 9
                  #
        | 
| 91 | 90 | sselda 3183 | 
. . . . . . . 8
       
               #              | 
| 92 | 12, 29 | sseldd 3184 | 
. . . . . . . . 9
              | 
| 93 | 92 | adantr 276 | 
. . . . . . . 8
       
               #          
   | 
| 94 | 91, 93 | subcld 8337 | 
. . . . . . 7
       
               #                    | 
| 95 |   | breq1 4036 | 
. . . . . . . . . . 11
              #    
  #     | 
| 96 | 95 | elrab 2920 | 
. . . . . . . . . 10
                  #                 #
    | 
| 97 | 96 | simprbi 275 | 
. . . . . . . . 9
                  #        #    | 
| 98 | 97 | adantl 277 | 
. . . . . . . 8
       
               #         #    | 
| 99 | 91, 93, 98 | subap0d 8671 | 
. . . . . . 7
       
               #               #    | 
| 100 | 87, 88, 94, 99 | divdirapd 8856 | 
. . . . . 6
       
               #                                                                                                                      | 
| 101 | 85, 100 | eqtrd 2229 | 
. . . . 5
       
               #                                                                                                                    | 
| 102 | 101 | mpteq2dva 4123 | 
. . . 4
                       #                
                                                      #                                                                    | 
| 103 | 102 | oveq1d 5937 | 
. . 3
                        #
                                                    lim                   
    #   
                                                               lim      | 
| 104 | 47, 103 | eleqtrrd 2276 | 
. 2
                             
    #   
            
                                    lim      | 
| 105 |   | eqid 2196 | 
. . 3
                  #                                                                       #                
                                    | 
| 106 |   | addcl 8004 | 
. . . . 5
               
                  | 
| 107 | 106 | adantl 277 | 
. . . 4
       
                                | 
| 108 | 107, 11, 6, 56, 56, 58 | off 6148 | 
. . 3
                       | 
| 109 | 2, 3, 105, 5, 108, 7 | eldvap 14918 | 
. 2
                     
            
            ↾t              
                      #
                                                    lim        | 
| 110 | 10, 104, 109 | mpbir2and 946 | 
1
               
                 |