| Step | Hyp | Ref
| Expression |
| 1 | | gfsump1.fi |
. . 3
   |
| 2 | | fzf1o 11937 |
. . 3
       ♯       |
| 3 | 1, 2 | syl 14 |
. 2
       ♯       |
| 4 | | gfsump1.b |
. . . . 5
     |
| 5 | | gfsump1.g |
. . . . . 6
 CMnd |
| 6 | 5 | adantr 276 |
. . . . 5
 
     ♯      CMnd |
| 7 | | gfsump1.f |
. . . . . 6
           |
| 8 | 7 | adantr 276 |
. . . . 5
 
     ♯                |
| 9 | | gfsump1.zv |
. . . . . . 7
   |
| 10 | | gfsump1.z |
. . . . . . 7
   |
| 11 | | unsnfi 7111 |
. . . . . . 7
 

      |
| 12 | 1, 9, 10, 11 | syl3anc 1273 |
. . . . . 6
       |
| 13 | 12 | adantr 276 |
. . . . 5
 
     ♯            |
| 14 | | simpr 110 |
. . . . . . 7
 
     ♯           ♯       |
| 15 | | hashcl 11043 |
. . . . . . . . . . 11
 ♯    |
| 16 | 1, 15 | syl 14 |
. . . . . . . . . 10
 ♯    |
| 17 | | peano2nn0 9442 |
. . . . . . . . . 10
 ♯   ♯     |
| 18 | 16, 17 | syl 14 |
. . . . . . . . 9
  ♯     |
| 19 | | f1osng 5626 |
. . . . . . . . 9
   ♯  
    ♯          ♯          |
| 20 | 18, 9, 19 | syl2anc 411 |
. . . . . . . 8
    ♯          ♯          |
| 21 | 20 | adantr 276 |
. . . . . . 7
 
     ♯         ♯          ♯          |
| 22 | | fzp1disj 10315 |
. . . . . . . 8
    ♯     ♯      |
| 23 | 22 | a1i 9 |
. . . . . . 7
 
     ♯          ♯     ♯       |
| 24 | | disjsn 3731 |
. . . . . . . . 9
    
  |
| 25 | 10, 24 | sylibr 134 |
. . . . . . . 8
       |
| 26 | 25 | adantr 276 |
. . . . . . 7
 
     ♯            |
| 27 | | f1oun 5603 |
. . . . . . 7
        ♯        ♯          ♯              ♯     ♯               ♯             ♯     ♯             |
| 28 | 14, 21, 23, 26, 27 | syl22anc 1274 |
. . . . . 6
 
     ♯          ♯             ♯     ♯             |
| 29 | 1, 10 | jca 306 |
. . . . . . . . . . 11
     |
| 30 | | hashunsng 11071 |
. . . . . . . . . . 11
   
♯ 
     ♯      |
| 31 | 9, 29, 30 | sylc 62 |
. . . . . . . . . 10
 ♯       ♯     |
| 32 | 31 | oveq2d 6034 |
. . . . . . . . 9
    ♯           ♯      |
| 33 | | 1z 9505 |
. . . . . . . . . 10
 |
| 34 | | nn0uz 9791 |
. . . . . . . . . . . 12
     |
| 35 | | 1m1e0 9212 |
. . . . . . . . . . . . 13
   |
| 36 | 35 | fveq2i 5642 |
. . . . . . . . . . . 12
           |
| 37 | 34, 36 | eqtr4i 2255 |
. . . . . . . . . . 11
       |
| 38 | 16, 37 | eleqtrdi 2324 |
. . . . . . . . . 10
 ♯          |
| 39 | | fzsuc2 10314 |
. . . . . . . . . 10
  ♯        
    ♯        ♯     ♯       |
| 40 | 33, 38, 39 | sylancr 414 |
. . . . . . . . 9
     ♯        ♯     ♯       |
| 41 | 32, 40 | eqtrd 2264 |
. . . . . . . 8
    ♯           ♯     ♯       |
| 42 | 41 | adantr 276 |
. . . . . . 7
 
     ♯         ♯           ♯     ♯       |
| 43 | 42 | f1oeq2d 5579 |
. . . . . 6
 
     ♯           ♯            ♯ 
          
    ♯             ♯     ♯              |
| 44 | 28, 43 | mpbird 167 |
. . . . 5
 
     ♯          ♯            ♯               |
| 45 | 4, 6, 8, 13, 44 | gfsumval 16683 |
. . . 4
 
     ♯       gf   g      ♯           |
| 46 | | gfsump1.p |
. . . . 5
    |
| 47 | 5 | cmnmndd 13896 |
. . . . . 6
   |
| 48 | 47 | adantr 276 |
. . . . 5
 
     ♯        |
| 49 | | 1zzd 9506 |
. . . . 5
 
     ♯        |
| 50 | 38 | adantr 276 |
. . . . 5
 
     ♯      ♯          |
| 51 | 40 | adantr 276 |
. . . . . . . . 9
 
     ♯          ♯        ♯     ♯       |
| 52 | 51 | f1oeq2d 5579 |
. . . . . . . 8
 
     ♯           ♯             ♯         
    ♯             ♯     ♯              |
| 53 | 28, 52 | mpbird 167 |
. . . . . . 7
 
     ♯          ♯             ♯            |
| 54 | | f1of 5583 |
. . . . . . 7
     ♯             ♯         
    ♯             ♯            |
| 55 | 53, 54 | syl 14 |
. . . . . 6
 
     ♯          ♯             ♯            |
| 56 | | fco 5500 |
. . . . . 6
              ♯             ♯                ♯              ♯        |
| 57 | 8, 55, 56 | syl2anc 411 |
. . . . 5
 
     ♯       
   ♯              ♯        |
| 58 | 4, 46, 48, 49, 50, 57 | gsumsplit0 13934 |
. . . 4
 
     ♯       g      ♯           g   
   ♯           ♯           ♯           ♯       |
| 59 | 45, 58 | eqtrd 2264 |
. . 3
 
     ♯       gf    g   
   ♯           ♯           ♯           ♯       |
| 60 | | resco 5241 |
. . . . . . . . . 10
      ♯           ♯          ♯          ♯      |
| 61 | | resundir 5027 |
. . . . . . . . . . . 12
     ♯          ♯         ♯        ♯         ♯      |
| 62 | | incom 3399 |
. . . . . . . . . . . . . . . 16
   ♯       ♯        ♯  
  ♯      |
| 63 | 62, 22 | eqtri 2252 |
. . . . . . . . . . . . . . 15
   ♯       ♯     |
| 64 | | fnsng 5377 |
. . . . . . . . . . . . . . . . 17
   ♯  
    ♯        ♯      |
| 65 | 18, 9, 64 | syl2anc 411 |
. . . . . . . . . . . . . . . 16
    ♯        ♯      |
| 66 | | fnresdisj 5442 |
. . . . . . . . . . . . . . . 16
    ♯        ♯   
    ♯       ♯        ♯     
   ♯       |
| 67 | 65, 66 | syl 14 |
. . . . . . . . . . . . . . 15
     ♯       ♯        ♯         ♯       |
| 68 | 63, 67 | mpbii 148 |
. . . . . . . . . . . . . 14
     ♯     
   ♯      |
| 69 | 68 | uneq2d 3361 |
. . . . . . . . . . . . 13
      ♯        ♯         ♯          ♯       |
| 70 | | un0 3528 |
. . . . . . . . . . . . 13
 
   ♯    
    ♯     |
| 71 | 69, 70 | eqtrdi 2280 |
. . . . . . . . . . . 12
      ♯        ♯         ♯         ♯      |
| 72 | 61, 71 | eqtrid 2276 |
. . . . . . . . . . 11
      ♯          ♯        ♯      |
| 73 | 72 | coeq2d 4892 |
. . . . . . . . . 10
       ♯          ♯          ♯       |
| 74 | 60, 73 | eqtrid 2276 |
. . . . . . . . 9
   
   ♯           ♯     
   ♯       |
| 75 | 74 | adantr 276 |
. . . . . . . 8
 
     ♯            ♯       
   ♯         ♯       |
| 76 | | f1ofn 5584 |
. . . . . . . . . . 11
      ♯        ♯     |
| 77 | | fnresdm 5441 |
. . . . . . . . . . 11
    ♯  
    ♯      |
| 78 | 76, 77 | syl 14 |
. . . . . . . . . 10
      ♯         ♯      |
| 79 | 78 | adantl 277 |
. . . . . . . . 9
 
     ♯          ♯      |
| 80 | 79 | coeq2d 4892 |
. . . . . . . 8
 
     ♯       
   ♯         |
| 81 | 75, 80 | eqtrd 2264 |
. . . . . . 7
 
     ♯            ♯       
   ♯        |
| 82 | | f1of 5583 |
. . . . . . . . . 10
      ♯          ♯       |
| 83 | 82 | adantl 277 |
. . . . . . . . 9
 
     ♯           ♯       |
| 84 | 83 | frnd 5492 |
. . . . . . . 8
 
     ♯     
  |
| 85 | | cores 5240 |
. . . . . . . 8

        |
| 86 | 84, 85 | syl 14 |
. . . . . . 7
 
     ♯              |
| 87 | 81, 86 | eqtr4d 2267 |
. . . . . 6
 
     ♯            ♯       
   ♯          |
| 88 | 87 | oveq2d 6034 |
. . . . 5
 
     ♯       g       ♯           ♯      g        |
| 89 | | ssun1 3370 |
. . . . . . . . 9

    |
| 90 | 89 | a1i 9 |
. . . . . . . 8

      |
| 91 | 7, 90 | fssresd 5513 |
. . . . . . 7
         |
| 92 | 91 | adantr 276 |
. . . . . 6
 
     ♯              |
| 93 | 1 | adantr 276 |
. . . . . 6
 
     ♯        |
| 94 | 4, 6, 92, 93, 14 | gfsumval 16683 |
. . . . 5
 
     ♯       gf     g        |
| 95 | 88, 94 | eqtr4d 2267 |
. . . 4
 
     ♯       g       ♯           ♯      gf 
    |
| 96 | | nn0p1nn 9441 |
. . . . . . . . . 10
 ♯   ♯     |
| 97 | 16, 96 | syl 14 |
. . . . . . . . 9
  ♯     |
| 98 | | nnuz 9792 |
. . . . . . . . 9
     |
| 99 | 97, 98 | eleqtrdi 2324 |
. . . . . . . 8
  ♯         |
| 100 | | eluzfz2 10267 |
. . . . . . . 8
  ♯        ♯       ♯      |
| 101 | 99, 100 | syl 14 |
. . . . . . 7
  ♯       ♯      |
| 102 | 101 | adantr 276 |
. . . . . 6
 
     ♯       ♯       ♯      |
| 103 | | fvco3 5717 |
. . . . . 6
      ♯             ♯           ♯       ♯           ♯           ♯            ♯          ♯       |
| 104 | 55, 102, 103 | syl2anc 411 |
. . . . 5
 
     ♯            ♯           ♯            ♯          ♯       |
| 105 | 76 | adantl 277 |
. . . . . . . 8
 
     ♯         ♯     |
| 106 | 65 | adantr 276 |
. . . . . . . 8
 
     ♯         ♯        ♯      |
| 107 | 18 | adantr 276 |
. . . . . . . . . 10
 
     ♯       ♯     |
| 108 | | snidg 3698 |
. . . . . . . . . 10
  ♯    ♯     ♯      |
| 109 | 107, 108 | syl 14 |
. . . . . . . . 9
 
     ♯       ♯     ♯      |
| 110 | 23, 109 | jca 306 |
. . . . . . . 8
 
     ♯           ♯     ♯      ♯     ♯       |
| 111 | | fvun2 5713 |
. . . . . . . 8
     ♯      ♯        ♯         ♯     ♯      ♯     ♯           ♯          ♯        ♯         ♯      |
| 112 | 105, 106,
110, 111 | syl3anc 1273 |
. . . . . . 7
 
     ♯           ♯          ♯        ♯         ♯      |
| 113 | 9 | adantr 276 |
. . . . . . . 8
 
     ♯        |
| 114 | | fvsng 5850 |
. . . . . . . 8
   ♯  
     ♯         ♯      |
| 115 | 107, 113,
114 | syl2anc 411 |
. . . . . . 7
 
     ♯          ♯         ♯      |
| 116 | 112, 115 | eqtrd 2264 |
. . . . . 6
 
     ♯           ♯          ♯      |
| 117 | 116 | fveq2d 5643 |
. . . . 5
 
     ♯              ♯          ♯           |
| 118 | 104, 117 | eqtrd 2264 |
. . . 4
 
     ♯            ♯           ♯          |
| 119 | 95, 118 | oveq12d 6036 |
. . 3
 
     ♯        g   
   ♯           ♯           ♯           ♯       gf           |
| 120 | 59, 119 | eqtrd 2264 |
. 2
 
     ♯       gf    gf 
         |
| 121 | 3, 120 | exlimddv 1947 |
1
  gf    gf           |