ARBVARS _ _ _ _ _ _ _ _ _ _ _ _ switch

When arbvars is on, the solutions of singular or underdetermined systems of equations are presented in terms of arbitrary complex variables (see arbcomplex). Otherwise, the solution is parametrized i n terms of some of the input variables. Default is on.

examples:

solve({2x + y,4x + 2y},{x,y}); 

         arbcomplex(1)
  {{x= - -------------,y=arbcomplex(1)}} 
               2


solve({sqrt(x)+ y**3-1},{x,y});				


                            6       3
  		   {{y=arbcomplex(2),x=y   - 2*y   + 1}} 


off arbvars; 

solve({2x + y,4x + 2y},{x,y}); 

         y
  {{x= - -}} 
         2


solve({sqrt(x)+ y**3-1},{x,y});				


            6       3
  		   {{x=y   - 2*y   + 1}} 

With arbvars off, the return value {{}} means th at the equations given to solve imply no relation among the input variables.