Algebra helps Geometry 

 

Characteristic of GeoGebra:  

 

an expression in the algebra view corresponds to an object in the graphics view and vice versa. 

 

 

 

 

 

• Nash functions 

f(x): Rn--------> R 

 

analytic and P(x, f(x))=0,  for some polynomial P(x,t) 

 

 

Nash functions 

 

 

Quantifier Elimination, projection of real algebraic sets