| Step | Hyp | Ref
| Expression |
| 1 | | cantnfrescl.d |
. . . . . . . . . . . . 13
   |
| 2 | | cantnfrescl.b |
. . . . . . . . . . . . 13

  |
| 3 | | cantnfrescl.x |
. . . . . . . . . . . . 13
 

 
  |
| 4 | 1, 2, 3 | extmptsuppeq 7319 |
. . . . . . . . . . . 12
    supp     supp    |
| 5 | | oieq2 8418 |
. . . . . . . . . . . 12
    supp     supp  OrdIso
   supp   OrdIso    supp     |
| 6 | 4, 5 | syl 17 |
. . . . . . . . . . 11
 OrdIso    supp   OrdIso    supp     |
| 7 | 6 | fveq1d 6193 |
. . . . . . . . . 10
 OrdIso    supp      OrdIso    supp        |
| 8 | 7 | 3ad2ant1 1082 |
. . . . . . . . 9
 
OrdIso    supp    OrdIso    supp      OrdIso    supp        |
| 9 | 8 | oveq2d 6666 |
. . . . . . . 8
 
OrdIso    supp     OrdIso    supp        OrdIso    supp         |
| 10 | | suppssdm 7308 |
. . . . . . . . . . . . 13
   supp  
  |
| 11 | | eqid 2622 |
. . . . . . . . . . . . . . 15
     |
| 12 | 11 | dmmptss 5631 |
. . . . . . . . . . . . . 14
 
 |
| 13 | 12 | a1i 11 |
. . . . . . . . . . . . 13
     |
| 14 | 10, 13 | syl5ss 3614 |
. . . . . . . . . . . 12
    supp    |
| 15 | 14 | 3ad2ant1 1082 |
. . . . . . . . . . 11
 
OrdIso    supp       supp 
  |
| 16 | | eqid 2622 |
. . . . . . . . . . . . . 14
OrdIso    supp   OrdIso    supp    |
| 17 | 16 | oif 8435 |
. . . . . . . . . . . . 13
OrdIso    supp     OrdIso    supp        supp   |
| 18 | 17 | ffvelrni 6358 |
. . . . . . . . . . . 12

OrdIso    supp   OrdIso    supp         supp    |
| 19 | 18 | 3ad2ant2 1083 |
. . . . . . . . . . 11
 
OrdIso    supp    OrdIso    supp         supp    |
| 20 | 15, 19 | sseldd 3604 |
. . . . . . . . . 10
 
OrdIso    supp    OrdIso    supp        |
| 21 | | fvres 6207 |
. . . . . . . . . 10
 OrdIso    supp     
       OrdIso    supp            OrdIso
   supp         |
| 22 | 20, 21 | syl 17 |
. . . . . . . . 9
 
OrdIso    supp       
   OrdIso    supp            OrdIso    supp         |
| 23 | 2 | 3ad2ant1 1082 |
. . . . . . . . . . 11
 
OrdIso    supp      |
| 24 | 23 | resmptd 5452 |
. . . . . . . . . 10
 
OrdIso    supp            |
| 25 | 24 | fveq1d 6193 |
. . . . . . . . 9
 
OrdIso    supp       
   OrdIso    supp            OrdIso    supp         |
| 26 | 8 | fveq2d 6195 |
. . . . . . . . 9
 
OrdIso    supp         OrdIso    supp            OrdIso
   supp         |
| 27 | 22, 25, 26 | 3eqtr3d 2664 |
. . . . . . . 8
 
OrdIso    supp         OrdIso    supp            OrdIso
   supp         |
| 28 | 9, 27 | oveq12d 6668 |
. . . . . . 7
 
OrdIso    supp      OrdIso    supp            OrdIso
   supp          OrdIso    supp            OrdIso
   supp          |
| 29 | 28 | oveq1d 6665 |
. . . . . 6
 
OrdIso    supp       OrdIso    supp            OrdIso
   supp            OrdIso    supp            OrdIso
   supp           |
| 30 | 29 | mpt2eq3dva 6719 |
. . . . 5
  OrdIso    supp       OrdIso    supp            OrdIso    supp           OrdIso    supp       OrdIso    supp            OrdIso    supp            |
| 31 | 6 | dmeqd 5326 |
. . . . . 6
 OrdIso    supp  
OrdIso    supp     |
| 32 | | eqid 2622 |
. . . . . 6
 |
| 33 | | mpt2eq12 6715 |
. . . . . 6
  OrdIso    supp  
OrdIso    supp   
 OrdIso    supp       OrdIso    supp            OrdIso
   supp          
OrdIso    supp       OrdIso    supp            OrdIso
   supp            |
| 34 | 31, 32, 33 | sylancl 694 |
. . . . 5
  OrdIso    supp       OrdIso    supp            OrdIso    supp           OrdIso    supp       OrdIso    supp            OrdIso    supp            |
| 35 | 30, 34 | eqtrd 2656 |
. . . 4
  OrdIso    supp       OrdIso    supp            OrdIso    supp           OrdIso    supp       OrdIso    supp            OrdIso    supp            |
| 36 | | eqid 2622 |
. . . 4
 |
| 37 | | seqomeq12 7549 |
. . . 4
   OrdIso    supp       OrdIso    supp            OrdIso    supp           OrdIso    supp       OrdIso    supp            OrdIso    supp          
seq𝜔  OrdIso
   supp       OrdIso    supp            OrdIso
   supp            seq𝜔  OrdIso    supp       OrdIso    supp            OrdIso    supp              |
| 38 | 35, 36, 37 | sylancl 694 |
. . 3
 seq𝜔  OrdIso    supp       OrdIso    supp            OrdIso    supp           
seq𝜔  OrdIso
   supp       OrdIso    supp            OrdIso
   supp              |
| 39 | 38, 31 | fveq12d 6197 |
. 2
 seq𝜔  OrdIso
   supp       OrdIso    supp            OrdIso
   supp              OrdIso    supp    seq𝜔  OrdIso    supp       OrdIso
   supp            OrdIso    supp              OrdIso    supp      |
| 40 | | cantnfs.s |
. . 3
 CNF   |
| 41 | | cantnfs.a |
. . 3
   |
| 42 | | cantnfs.b |
. . 3
   |
| 43 | | cantnfres.m |
. . 3
     |
| 44 | | eqid 2622 |
. . 3
seq𝜔      OrdIso    supp            OrdIso
   supp            seq𝜔  
   OrdIso    supp            OrdIso
   supp             |
| 45 | 40, 41, 42, 16, 43, 44 | cantnfval2 8566 |
. 2
   CNF    
  seq𝜔  OrdIso    supp       OrdIso
   supp            OrdIso    supp              OrdIso    supp      |
| 46 | | cantnfrescl.t |
. . 3
 CNF   |
| 47 | | eqid 2622 |
. . 3
OrdIso    supp   OrdIso    supp    |
| 48 | | cantnfrescl.a |
. . . . 5

  |
| 49 | 40, 41, 42, 1, 2, 3,
48, 46 | cantnfrescl 8573 |
. . . 4
         |
| 50 | 43, 49 | mpbid 222 |
. . 3
     |
| 51 | | eqid 2622 |
. . 3
seq𝜔      OrdIso    supp            OrdIso
   supp            seq𝜔  
   OrdIso    supp            OrdIso
   supp             |
| 52 | 46, 41, 1, 47, 50, 51 | cantnfval2 8566 |
. 2
   CNF    
  seq𝜔  OrdIso    supp       OrdIso
   supp            OrdIso    supp              OrdIso    supp      |
| 53 | 39, 45, 52 | 3eqtr4d 2666 |
1
   CNF    
    CNF    
    |