Proof of Theorem plibgax4b
| Step | Hyp | Ref
| Expression |
| 1 | | plibgax4b.1 |
. . . . . . . 8
  |
| 2 | | biid 187 |
. . . . . . . 8
   Plig
 
    Plig
 
    |
| 3 | | biid 187 |
. . . . . . . 8
                  l  l l
l

         
  
      
l  l l l 
     |
| 4 | | biid 187 |
. . . . . . . 8
          
  
                       
  
                |
| 5 | | biid 187 |
. . . . . . . 8
 l       l l l 
         
  
  
  
                           
  
  
  
         l 


   l l l 
         
  
  
  
                           
  
  
  
           |
| 6 | | biid 187 |
. . . . . . . 8
 l       l l
l
           l      
  
  l          
  l  l       l l
l
           l      
  
  l          
  l    |
| 7 | | biid 187 |
. . . . . . . 8
 l       l l
l
      
  
  l      
  
  l              l  l       l l
l
      
  
  l      
  
  l              l    |
| 8 | 1, 2, 3, 4, 5, 6, 7 | isplibg 15319 |
. . . . . . 7
       Plibg    Plig


    

              l  l l l 
     
                          l 


   l l l 
         
  
  
  
                           
  
  
  
          l       l l
l
           l      
  
  l          
  l  l       l l
l
      
  
  l      
  
  l              l          |
| 9 | 8 | simplbda 465 |
. . . . . 6
     
 Plibg
                  l  l l
l

     
                          l 


   l l l 
         
  
  
  
                           
  
  
  
          l       l l
l
           l      
  
  l          
  l  l       l l
l
      
  
  l      
  
  l              l        |
| 10 | 9 | simprd 352 |
. . . . 5
     
 Plibg
          
  
               l 


   l l l 
         
  
  
  
                           
  
  
  
          l       l l
l
           l      
  
  l          
  l  l       l l
l
      
  
  l      
  
  l              l       |
| 11 | 10 | simprd 352 |
. . . 4
     
 Plibg
 l       l l l 
         
  
  
  
                           
  
  
  
          l       l l
l
           l      
  
  l          
  l  l       l l
l
      
  
  l      
  
  l              l      |
| 12 | 11 | simprd 352 |
. . 3
     
 Plibg
 l       l l
l
           l      
  
  l          
  l  l       l l
l
      
  
  l      
  
  l              l     |
| 13 | 12 | simprd 352 |
. 2
     
 Plibg
l 


   l
l
l       
  
  l      
  
  l              l    |
| 14 | 13 | ex 402 |
1
       Plibg l 


   l
l
l       
  
  l      
  
  l              l     |