"Dahnial" wrote in message <firstname.lastname@example.org>... > "Bruno Luong" <email@example.com> wrote in message > > Optimization problem where variable is defined on an open interval (<) is usually incorrect stated, since there will be no solution. > > > > Bruno > > Hi Bruno, > thanks for your response > > but the constraint is in a closed interval, between 0 and 10 and not the open one (all the real value). > i should say, i simplify my question. my actual constraint for C1 is: 0.1 of the initial value until 10 times the initial value > but i think it is too complex, so i just ask 0<C1<10
This 0 < C1 < 10 an open interval. 0.1*a <= C1 * 10*a is a close interval, whatever the value of a. Pick your choice. Simplify the problem as you did just make a well-posed problem to an ill-posed one.