// f(z,to)=B(to)*z + C(to)=0, B(to)!=0.
//
// z=-C(to)/B(to) is one and only
- // solution inspite of the fact that D(t)>0 for any value of t.
+ // solution in spite of the fact that D(t)>0 for any value of t.
//
if(to<NewMax && to>NewMin) {
//-----------------------------------------------------------------