| Step | Hyp | Ref
| Expression |
| 1 | | df-frec 6458 |
. . . . . . . . . . . . 13
frec   recs               
       |
| 2 | | frecsuclem.g |
. . . . . . . . . . . . . . 15
 
 
                |
| 3 | | recseq 6373 |
. . . . . . . . . . . . . . 15
               
   
recs  recs     
                 |
| 4 | 2, 3 | ax-mp 5 |
. . . . . . . . . . . . . 14
recs  recs     
                |
| 5 | 4 | reseq1i 4943 |
. . . . . . . . . . . . 13
recs   recs               
       |
| 6 | 1, 5 | eqtr4i 2220 |
. . . . . . . . . . . 12
frec   recs    |
| 7 | 6 | fveq1i 5562 |
. . . . . . . . . . 11
frec    
  recs       |
| 8 | | peano2 4632 |
. . . . . . . . . . . 12
   |
| 9 | | fvres 5585 |
. . . . . . . . . . . 12
  recs      recs       |
| 10 | 8, 9 | syl 14 |
. . . . . . . . . . 11
  recs      recs       |
| 11 | 7, 10 | eqtrid 2241 |
. . . . . . . . . 10
 frec    
 recs   
   |
| 12 | 11 | 3ad2ant3 1022 |
. . . . . . . . 9
      
 frec    
 recs   
   |
| 13 | | eqid 2196 |
. . . . . . . . . . 11
recs  recs   |
| 14 | 2 | funmpt2 5298 |
. . . . . . . . . . . 12
 |
| 15 | 14 | a1i 9 |
. . . . . . . . . . 11
      
   |
| 16 | | ordom 4644 |
. . . . . . . . . . . 12
 |
| 17 | 16 | a1i 9 |
. . . . . . . . . . 11
      
   |
| 18 | | vex 2766 |
. . . . . . . . . . . . . 14
 |
| 19 | 18 | a1i 9 |
. . . . . . . . . . . . 13
       
     
  |
| 20 | | simp2 1000 |
. . . . . . . . . . . . . 14
       
     
  |
| 21 | | simp3 1001 |
. . . . . . . . . . . . . 14
       
     
      |
| 22 | | simp11 1029 |
. . . . . . . . . . . . . . 15
       
     

      |
| 23 | | fveq2 5561 |
. . . . . . . . . . . . . . . . 17
           |
| 24 | 23 | eleq1d 2265 |
. . . . . . . . . . . . . . . 16
     
       |
| 25 | 24 | cbvralv 2729 |
. . . . . . . . . . . . . . 15
 
   
       |
| 26 | 22, 25 | sylib 122 |
. . . . . . . . . . . . . 14
       
     

      |
| 27 | | simp12 1030 |
. . . . . . . . . . . . . 14
       
     
  |
| 28 | 20, 21, 26, 27 | frecabcl 6466 |
. . . . . . . . . . . . 13
       
     
             
     |
| 29 | | dmeq 4867 |
. . . . . . . . . . . . . . . . . . 19

  |
| 30 | 29 | eqeq1d 2205 |
. . . . . . . . . . . . . . . . . 18
 
   |
| 31 | | fveq1 5560 |
. . . . . . . . . . . . . . . . . . . 20
           |
| 32 | 31 | fveq2d 5565 |
. . . . . . . . . . . . . . . . . . 19
                   |
| 33 | 32 | eleq2d 2266 |
. . . . . . . . . . . . . . . . . 18
         
           |
| 34 | 30, 33 | anbi12d 473 |
. . . . . . . . . . . . . . . . 17
  
        

            |
| 35 | 34 | rexbidv 2498 |
. . . . . . . . . . . . . . . 16
  
                        |
| 36 | 29 | eqeq1d 2205 |
. . . . . . . . . . . . . . . . 17
 
   |
| 37 | 36 | anbi1d 465 |
. . . . . . . . . . . . . . . 16
  
      |
| 38 | 35, 37 | orbi12d 794 |
. . . . . . . . . . . . . . 15
              
 
 

               |
| 39 | 38 | abbidv 2314 |
. . . . . . . . . . . . . 14
              
                
     |
| 40 | 39, 2 | fvmptg 5640 |
. . . . . . . . . . . . 13
     
                               
     |
| 41 | 19, 28, 40 | syl2anc 411 |
. . . . . . . . . . . 12
       
     
       
               |
| 42 | 41, 28 | eqeltrd 2273 |
. . . . . . . . . . 11
       
     
      |
| 43 | | limom 4651 |
. . . . . . . . . . . . . . 15
 |
| 44 | | limuni 4432 |
. . . . . . . . . . . . . . 15

   |
| 45 | 43, 44 | ax-mp 5 |
. . . . . . . . . . . . . 14
  |
| 46 | 45 | eleq2i 2263 |
. . . . . . . . . . . . 13

   |
| 47 | | peano2 4632 |
. . . . . . . . . . . . 13

  |
| 48 | 46, 47 | sylbir 135 |
. . . . . . . . . . . 12
    |
| 49 | 48 | adantl 277 |
. . . . . . . . . . 11
       
  
  |
| 50 | 45 | eleq2i 2263 |
. . . . . . . . . . . . 13

   |
| 51 | 8, 50 | sylib 122 |
. . . . . . . . . . . 12
    |
| 52 | 51 | 3ad2ant3 1022 |
. . . . . . . . . . 11
      
    |
| 53 | 13, 15, 17, 42, 49, 52 | tfrcldm 6430 |
. . . . . . . . . 10
      

recs    |
| 54 | 13 | tfr2a 6388 |
. . . . . . . . . 10
 recs  recs        recs 
    |
| 55 | 53, 54 | syl 14 |
. . . . . . . . 9
      
 recs        recs 
    |
| 56 | 12, 55 | eqtrd 2229 |
. . . . . . . 8
      
 frec    
    recs      |
| 57 | | tfrfun 6387 |
. . . . . . . . . . 11
recs   |
| 58 | 57 | a1i 9 |
. . . . . . . . . 10
      
 recs    |
| 59 | 8 | 3ad2ant3 1022 |
. . . . . . . . . 10
      
   |
| 60 | | resfunexg 5786 |
. . . . . . . . . 10
  recs   recs     |
| 61 | 58, 59, 60 | syl2anc 411 |
. . . . . . . . 9
      
 recs     |
| 62 | | frecfcl 6472 |
. . . . . . . . . . . . 13
        frec         |
| 63 | 6 | feq1i 5403 |
. . . . . . . . . . . . 13
frec      
recs         |
| 64 | 62, 63 | sylib 122 |
. . . . . . . . . . . 12
        recs         |
| 65 | 64 | 3adant3 1019 |
. . . . . . . . . . 11
      
 recs         |
| 66 | | simp3 1001 |
. . . . . . . . . . . 12
      
   |
| 67 | | ordelsuc 4542 |
. . . . . . . . . . . . . 14
   
   |
| 68 | 16, 67 | mpan2 425 |
. . . . . . . . . . . . 13
 
   |
| 69 | 68 | 3ad2ant3 1022 |
. . . . . . . . . . . 12
      
 
   |
| 70 | 66, 69 | mpbid 147 |
. . . . . . . . . . 11
      
   |
| 71 | | fssres2 5438 |
. . . . . . . . . . 11
  recs       
recs         |
| 72 | 65, 70, 71 | syl2anc 411 |
. . . . . . . . . 10
      
 recs         |
| 73 | | simp1 999 |
. . . . . . . . . . 11
      
 
      |
| 74 | 73, 25 | sylib 122 |
. . . . . . . . . 10
      
 
      |
| 75 | | simp2 1000 |
. . . . . . . . . 10
      
   |
| 76 | 59, 72, 74, 75 | frecabcl 6466 |
. . . . . . . . 9
      
     recs  
    recs         recs        |
| 77 | | dmeq 4867 |
. . . . . . . . . . . . . . 15
 recs 

recs     |
| 78 | 77 | eqeq1d 2205 |
. . . . . . . . . . . . . 14
 recs 
 
recs      |
| 79 | | fveq1 5560 |
. . . . . . . . . . . . . . . 16
 recs 
      recs        |
| 80 | 79 | fveq2d 5565 |
. . . . . . . . . . . . . . 15
 recs 
             recs         |
| 81 | 80 | eleq2d 2266 |
. . . . . . . . . . . . . 14
 recs 
         
    recs          |
| 82 | 78, 81 | anbi12d 473 |
. . . . . . . . . . . . 13
 recs 
  
         
recs  
    recs           |
| 83 | 82 | rexbidv 2498 |
. . . . . . . . . . . 12
 recs 
            
  recs  
    recs           |
| 84 | 77 | eqeq1d 2205 |
. . . . . . . . . . . . 13
 recs 
  recs 
    |
| 85 | 84 | anbi1d 465 |
. . . . . . . . . . . 12
 recs 
   
 recs       |
| 86 | 83, 85 | orbi12d 794 |
. . . . . . . . . . 11
 recs 
    
           
 
 recs       recs         recs        |
| 87 | 86 | abbidv 2314 |
. . . . . . . . . 10
 recs 
              
       recs  
    recs         recs        |
| 88 | 87, 2 | fvmptg 5640 |
. . . . . . . . 9
  recs  
    recs  
    recs         recs          recs        recs       recs         recs        |
| 89 | 61, 76, 88 | syl2anc 411 |
. . . . . . . 8
      
    recs        recs       recs         recs        |
| 90 | 56, 89 | eqtrd 2229 |
. . . . . . 7
      
 frec    
     recs 

    recs 
       recs        |
| 91 | 90 | abeq2d 2309 |
. . . . . 6
      
  frec    
    recs 

    recs 
       recs        |
| 92 | | fdm 5416 |
. . . . . . . . . . . 12
 recs      
recs     |
| 93 | 72, 92 | syl 14 |
. . . . . . . . . . 11
      
 recs     |
| 94 | | peano3 4633 |
. . . . . . . . . . . 12
   |
| 95 | 94 | 3ad2ant3 1022 |
. . . . . . . . . . 11
      
   |
| 96 | 93, 95 | eqnetrd 2391 |
. . . . . . . . . 10
      
 recs     |
| 97 | 96 | neneqd 2388 |
. . . . . . . . 9
      
 recs     |
| 98 | 97 | intnanrd 933 |
. . . . . . . 8
      
  recs 

   |
| 99 | | biorf 745 |
. . . . . . . 8
  recs     
 recs 

    recs 
        recs      recs  
    recs            |
| 100 | 98, 99 | syl 14 |
. . . . . . 7
      
  
 recs 

    recs 
        recs      recs  
    recs            |
| 101 | | orcom 729 |
. . . . . . 7
   recs    
 recs       recs            recs  
    recs         recs       |
| 102 | 100, 101 | bitrdi 196 |
. . . . . 6
      
  
 recs 

    recs 
         recs  
    recs         recs        |
| 103 | 93 | eqeq1d 2205 |
. . . . . . . . . 10
      
  recs  
   |
| 104 | | vex 2766 |
. . . . . . . . . . . 12
 |
| 105 | | suc11g 4594 |
. . . . . . . . . . . 12
 
 
   |
| 106 | 104, 105 | mpan2 425 |
. . . . . . . . . . 11
     |
| 107 | 106 | 3ad2ant3 1022 |
. . . . . . . . . 10
      
     |
| 108 | 103, 107 | bitrd 188 |
. . . . . . . . 9
      
  recs  
   |
| 109 | | eqcom 2198 |
. . . . . . . . 9

  |
| 110 | 108, 109 | bitrdi 196 |
. . . . . . . 8
      
  recs  
   |
| 111 | 110 | anbi1d 465 |
. . . . . . 7
      
  
recs  
    recs       

    recs           |
| 112 | 111 | rexbidv 2498 |
. . . . . 6
      
  
 recs 

    recs 
       
    recs           |
| 113 | 91, 102, 112 | 3bitr2d 216 |
. . . . 5
      
  frec    
  
    recs 
         |
| 114 | | fveq2 5561 |
. . . . . . . 8
  recs       recs        |
| 115 | 114 | fveq2d 5565 |
. . . . . . 7
     recs           recs         |
| 116 | 115 | eleq2d 2266 |
. . . . . 6
      recs      
    recs          |
| 117 | 116 | ceqsrexbv 2895 |
. . . . 5
  
    recs 
      
    recs          |
| 118 | 113, 117 | bitrdi 196 |
. . . 4
      
  frec    
 
    recs 
         |
| 119 | 118 | 3anibar 1167 |
. . 3
      
  frec    
     recs          |
| 120 | 119 | eqrdv 2194 |
. 2
      
 frec    
     recs         |
| 121 | | sucidg 4452 |
. . . . . 6
   |
| 122 | | fvres 5585 |
. . . . . 6
  recs 
    recs       |
| 123 | 121, 122 | syl 14 |
. . . . 5
  recs      recs       |
| 124 | 6 | fveq1i 5562 |
. . . . . 6
frec       recs 
     |
| 125 | | fvres 5585 |
. . . . . 6
  recs      recs       |
| 126 | 124, 125 | eqtrid 2241 |
. . . . 5
 frec      recs       |
| 127 | 123, 126 | eqtr4d 2232 |
. . . 4
  recs      frec        |
| 128 | 127 | 3ad2ant3 1022 |
. . 3
      
  recs      frec        |
| 129 | 128 | fveq2d 5565 |
. 2
      
     recs          frec         |
| 130 | 120, 129 | eqtrd 2229 |
1
      
 frec    
    frec         |