Hi, every one,

I’ve been stuck in a nonlinear programing problem

max z=c*v

st. S*v=0

lb <=v<=ub

K*u=0

v*u<0

*** for the last constraint, I know that gams only permits “<=”, but

how to define an absolute one?

Thank you!

\

Hi, every one,

I’ve been stuck in a nonlinear programing problem

max z=c*v

st. S*v=0

lb <=v<=ub

K*u=0

v*u<0

*** for the last constraint, I know that gams only permits “<=”, but

how to define an absolute one?

Thank you!

\

sorry for my poor English, it is “strictly greater/less than”, not

“absolute”.

On Jul 19, 7:58 pm, Riyeyan wrote:

Hi, every one,

I’ve been stuck in a nonlinear programing problem

max z=c*v

st. S*v=0

`lb > K*u=0 v*u >`

*** for the last constraint, I know that gams only permits " > how to define an absolute one?

Thank you!

\

Thank you, dear Arne, I think I should add a small positive.

On Mon, Jul 19, 2010 at 8:21 PM, Arne Stolbjerg Drud wrote:

In optimization, strict inequalities do not make sense. What is the solution

to the modelmin x, subject to x > 0 ? Is it 1.e-10 or 1.e-20 or something smaller.

Optimization theory is usually concerned with bounded closed sets where

closed means that the boundary is part of the feasible set.You will have to think about how close to zero you can accept and then use a

nonzero right hand side.Regards

Arne Stolbjerg Drud

Arne Stolbjerg Drud

ARKI Consulting & Development A/S

Bagsvaerdvej 246A, DK-2880 Bagsvaerd, Denmark

Phone: (+45) 44 49 03 23, Fax: (+45) 44 49 03 33, email: adrud@arki.dk-----Oprindelig meddelelse-----

Fra: gamsworld@googlegroups.com [mailto:gamsworld@googlegroups.com] PÃ¥ vegne

af Riyeyan

Sendt: 19. juli 2010 13:59

Til: gamsworld

Emne: how to define absolute greater/less-than in equantion part?Hi, every one,

I’ve been stuck in a nonlinear programing problem

max z=c*v

st. S*v=0

lb >

K*u=0v*u >

*** for the last constraint, I know that gams only permits " > how to define an absolute one?Thank you!

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