|  | 
              
                
                  z
                
                :
                string
                
                  fm
                
                :
                formula<fol> 
              
                
                  Returns: 
                
                thm | 
        
          |  | 
              
                
                  s
                
                :
                term
                
                  t
                
                :
                term 
              
                
                  Returns: 
                
                thm | 
        
          |  | 
              
                
                  s
                
                :
                term
                
                  t
                
                :
                term
                
                  u
                
                :
                term 
              
                
                  Returns: 
                
                thm | 
        
          |  | 
              
                
                  x
                
                :
                string
                
                  th
                
                :
                thm 
              
                
                  Returns: 
                
                thm | 
        
          |  | 
              
                
                  x
                
                :
                string
                
                  p
                
                :
                formula<fol>
                
                  q
                
                :
                formula<fol> 
              
                
                  Returns: 
                
                thm | 
        
          |  | 
              
                
                  x
                
                :
                string
                
                  th
                
                :
                thm 
              
                
                  Returns: 
                
                thm | 
        
          |  | 
              
                
                  x
                
                :
                string
                
                  p
                
                :
                formula<fol>
                
                  q
                
                :
                formula<fol> 
              
                
                  Returns: 
                
                thm | 
        
          |  | 
              
                
                  x
                
                :
                string
                
                  th
                
                :
                thm 
              
                
                  Returns: 
                
                thm | 
        
          |  | 
              
                
                  s
                
                :
                term
                
                  t
                
                :
                term
                
                  stm
                
                :
                term
                
                  ttm
                
                :
                term 
              
                
                  Returns: 
                
                thm | 
        
          |  | 
              
                
                  t
                
                :
                term
                
                  fm
                
                :
                formula<fol> 
              
                
                  Returns: 
                
                thm | 
        
          |  | 
              
                
                  s
                
                :
                term
                
                  t
                
                :
                term
                
                  sfm
                
                :
                formula<fol>
                
                  tfm
                
                :
                formula<fol> 
              
                
                  Returns: 
                
                thm | 
        
          |  | 
              
                
                  t
                
                :
                term
                
                  th
                
                :
                thm 
              
                
                  Returns: 
                
                thm | 
        
          |  | 
              
                
                  th
                
                :
                thm 
              
                
                  Returns: 
                
                thm | 
        
          |  | 
              
                
                  th
                
                :
                thm 
              
                
                  Returns: 
                
                thm |