Re: Linear Program Optimal Extreme Points

2022-10-18 Thread Andrew Makhorin
The following article by Katta Murty, "A Problem in Enumerating Extreme Points, and an efficient Algorithm.", sheds some light on the issue; see http://www-personal.umich.edu/~murty/segments.pdf

Re: Linear Program Optimal Extreme Points

2022-10-11 Thread Michael Hennebry
My first thought on such a task is to fix all variablee, structural and otherwise, with nonzero reduced costs. Unless using exact arithmetic, that is an interesting task in itself. Even so, I'd expect it to be better than using a single linear constraint to implicitly fix them. A better tactic

Re: Linear Program Optimal Extreme Points

2022-10-07 Thread Manuel Muñoz Márquez
Hi, El vie, 07-10-2022 a las 11:04 +1030, Prabhu Manyem escribió: > To Andrew, Peter and Manuel, > > Thank you for your help on this topic. > > To Manuel, Why only vertices next to the starting vertex?  If the > links are A-->B-->C and B-->D, so first you go from A to B, then B to > C, then

Linear Program Optimal Extreme Points

2022-10-06 Thread Prabhu Manyem
To Andrew, Peter and Manuel, Thank you for your help on this topic. To Manuel, Why only vertices next to the starting vertex? If the links are A-->B-->C and B-->D, so first you go from A to B, then B to C, then backtrack to B (from C), and then you can go from B to D... This is what I had in

Re: [Fwd: Linear Program Optimal Extreme Points]

2022-10-06 Thread Naszvadi Peter
jue, 06-10-2022 a las 13:49 +0300, Andrew Makhorin escribió: Forwarded Message From: Prabhu Manyem To: fuk...@math.ethz.ch, Andrew Makhorin , avis@cs.mcgill.c a Subject: Linear Program Optimal Extreme Points Date: Thu, 6 Oct 2022 10:04:22 +1030 Dear Andrew, Komei, David, I am

Re: [Fwd: Linear Program Optimal Extreme Points]

2022-10-06 Thread Manuel Muñoz Márquez
; From: Prabhu Manyem > To: fuk...@math.ethz.ch, Andrew Makhorin , avis@cs.mcgill.c > a > Subject: Linear Program Optimal Extreme Points > Date: Thu, 6 Oct 2022 10:04:22 +1030 > > Dear Andrew, Komei, David, > > I am a retired Maths professor in Adelaide, Australia. > >

[Fwd: Linear Program Optimal Extreme Points]

2022-10-06 Thread Andrew Makhorin
Forwarded Message From: Prabhu Manyem To: fuk...@math.ethz.ch, Andrew Makhorin , avis@cs.mcgill.c a Subject: Linear Program Optimal Extreme Points Date: Thu, 6 Oct 2022 10:04:22 +1030 Dear Andrew, Komei, David, I am a retired Maths professor in Adelaide, Australia. About