Re: [sage-support] Re: Solving a set of quadratic inequalities (continuous)

Hello !!! > Do you mean to say that you have complex numbers p_j and your inequalities > are of the form > |p_j-p_k|<=C and |p_j-p_k|>=D, and that you also have > some equations on Re(p_j) and Im(p_j) ? Oh, well, if you have something like that it would of course solve my problem too

[sage-support] Re: Solving a set of quadratic inequalities (continuous)

On Friday, 13 April 2012 21:59:55 UTC+8, Nathann Cohen wrote: > > Hello everybody !!! > > I would like to solve a set of equations with a very easy shape. My > equations are defined on variables p1_x, p1_y, p2_x, p2_y, ..., and I > would like to obtain values for them satisfying constraints like

[sage-support] Re: 3d plotting using Jmol: black screen of death [SOLVED]

On Tuesday, April 10, 2012 7:40:51 PM UTC-5, Benjamin Jones wrote: > > 3d plotting using Jmol: black screen of death > > I've read through all the Jmol problem threads here that I could find, > back to2008, and I can't find an answer to the "Jmol produces a > blank, > black d

[sage-support] Re: Finding positive kernel

On 4/24/12 8:36 AM, Doaa El-Sakout wrote: Hi I am using right_kernel to find a kernel, for example the result is [ 1 0 1 0 -1 0 0] [ 0 1 1 0 0 0 0] [ 0 0 0 1 1 0 0] [ 0 0 0 0 0 1 1] How can I (for an arbitrary kernel) get positive entries only, by making a linear combinat

[sage-support] Finding positive kernel

Hi I am using right_kernel to find a kernel, for example the result is [ 1 0 1 0 -1 0 0] [ 0 1 1 0 0 0 0] [ 0 0 0 1 1 0 0] [ 0 0 0 0 0 1 1] How can I (for an arbitrary kernel) get positive entries only, by making a linear combination of rows? Regards, Doaa -- To post to

[sage-support] [ANN] Optimization with categorical variables, disjunctive (and other logical) constraints

hi all, free solver interalg for global nonlinear optimization with specifiable accuracy now can handle categorical variables, disjunctive (and other logical) constraints, thus making it available to solve GDP, possibly in multiobjective form. There are ~ 2 months t