Of the final three groups, the largest and most important is 
  
    
      
        
          
            
              
                T
                ¯
              
            
          
          
            9
          
        
      
    
    {\displaystyle {\bar {T}}_{9}}
  , that is associated with an important Kac–Moody Lie algebra 
  
    
      
        
          
            E
          
          
            10
          
        
      
    
    {\displaystyle \mathrm {E} _{10}}
  .The trisection of the angle was one of the three famous problems of antiquity.
Tropicamide/hydroxyamfetamine (trade name Paremyd) is a combination drug used as an ophthalmic solution to induce mydriasis. It consists of:
Tropicamide (0.25%), an anticholinergic drug
Hydroxyamfetamine (norpholedrine, 1%), a sympathomimetic drug


== References ==