Hi list, has somebody an idea, how to increase the precision of algsys? fpprec : 30 doesn't work. use e.g. algsys([b^4+6*a^2*b^2+a^4,4*a*b^3+4*a^3*b-1],[a,b]); which gives approximate solutions. Increasing the number of significant digits may help with the inverse symbolic calculator. Regards Andre