| Step | Hyp | Ref
| Expression |
| 1 | | hbtlem4.r |
. . . . . . . . . 10
   |
| 2 | 1 | ad2antrr 762 |
. . . . . . . . 9
     deg1      
  |
| 3 | | hbtlem.p |
. . . . . . . . . 10
Poly1   |
| 4 | 3 | ply1ring 19618 |
. . . . . . . . 9

  |
| 5 | 2, 4 | syl 17 |
. . . . . . . 8
     deg1      
  |
| 6 | | hbtlem4.i |
. . . . . . . . 9
   |
| 7 | 6 | ad2antrr 762 |
. . . . . . . 8
     deg1      
  |
| 8 | | eqid 2622 |
. . . . . . . . . . 11
mulGrp  mulGrp   |
| 9 | 8 | ringmgp 18553 |
. . . . . . . . . 10

mulGrp    |
| 10 | 5, 9 | syl 17 |
. . . . . . . . 9
     deg1      
mulGrp    |
| 11 | | hbtlem4.x |
. . . . . . . . . . 11
   |
| 12 | 11 | ad2antrr 762 |
. . . . . . . . . 10
     deg1      
  |
| 13 | | hbtlem4.y |
. . . . . . . . . . 11
   |
| 14 | 13 | ad2antrr 762 |
. . . . . . . . . 10
     deg1      
  |
| 15 | | hbtlem4.xy |
. . . . . . . . . . 11

  |
| 16 | 15 | ad2antrr 762 |
. . . . . . . . . 10
     deg1      
  |
| 17 | | nn0sub2 11438 |
. . . . . . . . . 10
 
 
   |
| 18 | 12, 14, 16, 17 | syl3anc 1326 |
. . . . . . . . 9
     deg1      
    |
| 19 | | eqid 2622 |
. . . . . . . . . . 11
var1  var1   |
| 20 | | eqid 2622 |
. . . . . . . . . . 11
         |
| 21 | 19, 3, 20 | vr1cl 19587 |
. . . . . . . . . 10

var1        |
| 22 | 2, 21 | syl 17 |
. . . . . . . . 9
     deg1      
var1        |
| 23 | 8, 20 | mgpbas 18495 |
. . . . . . . . . 10
       mulGrp    |
| 24 | | eqid 2622 |
. . . . . . . . . 10
.g mulGrp   .g mulGrp    |
| 25 | 23, 24 | mulgnn0cl 17558 |
. . . . . . . . 9
  mulGrp   
var1           .g mulGrp    var1         |
| 26 | 10, 18, 22, 25 | syl3anc 1326 |
. . . . . . . 8
     deg1      
 
  .g mulGrp    var1         |
| 27 | | simplr 792 |
. . . . . . . 8
     deg1      
  |
| 28 | | hbtlem.u |
. . . . . . . . 9
LIdeal   |
| 29 | | eqid 2622 |
. . . . . . . . 9
         |
| 30 | 28, 20, 29 | lidlmcl 19217 |
. . . . . . . 8
         .g mulGrp    var1      
       .g mulGrp    var1            |
| 31 | 5, 7, 26, 27, 30 | syl22anc 1327 |
. . . . . . 7
     deg1      
     .g mulGrp    var1            |
| 32 | | eqid 2622 |
. . . . . . . . 9
deg1   deg1    |
| 33 | 20, 28 | lidlss 19210 |
. . . . . . . . . . 11
       |
| 34 | 7, 33 | syl 17 |
. . . . . . . . . 10
     deg1      
      |
| 35 | 34, 27 | sseldd 3604 |
. . . . . . . . 9
     deg1      
      |
| 36 | 32, 3, 19, 8, 24 | deg1pwle 23879 |
. . . . . . . . . 10
  
   deg1         .g mulGrp    var1        |
| 37 | 2, 18, 36 | syl2anc 693 |
. . . . . . . . 9
     deg1      
 deg1         .g mulGrp    var1        |
| 38 | | simpr 477 |
. . . . . . . . 9
     deg1      
 deg1     
  |
| 39 | 3, 32, 2, 20, 29, 26, 35, 18, 12, 37, 38 | deg1mulle2 23869 |
. . . . . . . 8
     deg1      
 deg1          .g mulGrp    var1                 |
| 40 | 14 | nn0cnd 11353 |
. . . . . . . . 9
     deg1      
  |
| 41 | 12 | nn0cnd 11353 |
. . . . . . . . 9
     deg1      
  |
| 42 | 40, 41 | npcand 10396 |
. . . . . . . 8
     deg1      
 
    |
| 43 | 39, 42 | breqtrd 4679 |
. . . . . . 7
     deg1      
 deg1          .g mulGrp    var1             |
| 44 | | eqid 2622 |
. . . . . . . . 9
         |
| 45 | 44, 3, 19, 8, 24, 20, 29, 2, 35, 18, 12 | coe1pwmulfv 19650 |
. . . . . . . 8
     deg1      
 coe1      .g mulGrp    var1                   coe1       |
| 46 | 42 | fveq2d 6195 |
. . . . . . . 8
     deg1      
 coe1      .g mulGrp    var1                   coe1      .g mulGrp    var1                |
| 47 | 45, 46 | eqtr3d 2658 |
. . . . . . 7
     deg1      
 coe1      coe1      .g mulGrp    var1                |
| 48 | | fveq2 6191 |
. . . . . . . . . 10
      .g mulGrp    var1         
 deg1       deg1          .g mulGrp    var1             |
| 49 | 48 | breq1d 4663 |
. . . . . . . . 9
      .g mulGrp    var1         
  deg1       deg1          .g mulGrp    var1              |
| 50 | | fveq2 6191 |
. . . . . . . . . . 11
      .g mulGrp    var1         
coe1  coe1      .g mulGrp    var1             |
| 51 | 50 | fveq1d 6193 |
. . . . . . . . . 10
      .g mulGrp    var1         
 coe1      coe1      .g mulGrp    var1                |
| 52 | 51 | eqeq2d 2632 |
. . . . . . . . 9
      .g mulGrp    var1         
  coe1      coe1    
 coe1      coe1      .g mulGrp    var1                 |
| 53 | 49, 52 | anbi12d 747 |
. . . . . . . 8
      .g mulGrp    var1         
  
deg1       coe1      coe1     
  deg1          .g mulGrp    var1            coe1      coe1      .g mulGrp    var1                  |
| 54 | 53 | rspcev 3309 |
. . . . . . 7
       .g mulGrp    var1            deg1          .g mulGrp    var1            coe1      coe1      .g mulGrp    var1                
  deg1       coe1      coe1        |
| 55 | 31, 43, 47, 54 | syl12anc 1324 |
. . . . . 6
     deg1      

  deg1       coe1      coe1        |
| 56 | | eqeq1 2626 |
. . . . . . . 8
  coe1       coe1    
 coe1      coe1        |
| 57 | 56 | anbi2d 740 |
. . . . . . 7
  coe1        deg1     
 coe1     
  deg1       coe1      coe1         |
| 58 | 57 | rexbidv 3052 |
. . . . . 6
  coe1         deg1     
 coe1     

  deg1       coe1      coe1         |
| 59 | 55, 58 | syl5ibrcom 237 |
. . . . 5
     deg1      
  coe1        deg1       coe1         |
| 60 | 59 | expimpd 629 |
. . . 4
 
    deg1       coe1      
  deg1       coe1         |
| 61 | 60 | rexlimdva 3031 |
. . 3
     deg1     
 coe1      
  deg1     
 coe1         |
| 62 | 61 | ss2abdv 3675 |
. 2
  
 
deg1     
 coe1           deg1       coe1         |
| 63 | | hbtlem.s |
. . . 4
ldgIdlSeq   |
| 64 | 3, 28, 63, 32 | hbtlem1 37693 |
. . 3
 
          
 
deg1     
 coe1         |
| 65 | 1, 6, 11, 64 | syl3anc 1326 |
. 2
             deg1     
 coe1         |
| 66 | 3, 28, 63, 32 | hbtlem1 37693 |
. . 3
 
          
 
deg1     
 coe1         |
| 67 | 1, 6, 13, 66 | syl3anc 1326 |
. 2
             deg1     
 coe1         |
| 68 | 62, 65, 67 | 3sstr4d 3648 |
1
        
          |