real numbers no relation property
R
        
      
    
    {\displaystyle \mathbf {R} }
   or 
  
    
      
        
          R
        
      
    
    {\displaystyle \mathbb {R} }
  , the set of all real numbers, including all rational numbers and all irrational numbers (which include algebraic numbers such as 
  
    
      
        
          
            2
          
        
      
    
    {\displaystyle {\sqrt {2}}}
   that cannot be rewritten as fractions, as well as transcendental numbers such as π and e);
no relation