Blogs about: Hirsch Conjecture

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Karim Adiprasito: Flag simplicial complexes and the non-revisiting path conjecture

Gil Kalai wrote 6 months ago: This post is authored by Karim Adiprasito The past months have seen some exciting progress on diamet … more →

Tags: convex polytopes, Guest Blogger, Karim Adiprasito, Flag complexes

Even if P=NP we might see no benefit10 comments

Adrian McMenamin wrote 9 months ago: A system of linear inequalities defines a polytope as a feasible region. The simplex algorithm begin … more →

Tags: New Scientist, PnP, np-complete, algorithm, Gil Kalai, Daniel Kleitman, Annals of Mathematics, simplex algorithm, Hirsch

Polymath3 (PHC6): The Polynomial Hirsch Conjecture - A Topological Approach37 comments

Gil Kalai wrote 2 years ago: This is a new polymath3 research thread. Our aim is to tackle the polynomial Hirsch conjecture which … more →

Tags: convex polytopes, Polymath3?, Geometry, Topological combinatorics

Polynomial Hirsch Conjecture 5: Abstractions and Counterexamples. 59 comments

Gil Kalai wrote 2 years ago: This is the 5th research thread of polymath3 studying the polynomial Hirsch conjecture. As you may r … more →

Tags: Open problems, Open Discussion, Polymath3?

Polymath3: Polynomial Hirsch Conjecture 473 comments

Gil Kalai wrote 2 years ago: So where are we? I guess we are trying all sorts of things, and perhaps we should try even more thin … more →

Tags: Combinatorics, Open problems, convex polytopes, Open Discussion, Polymath3?

Polymath 3: The Polynomial Hirsch Conjecture 2104 comments

Gil Kalai wrote 2 years ago: Here we start the second research thread about the polynomial Hirsch conjecture.  I hope that people … more →

Tags: Open problems, convex polytopes, Open Discussion, Polymath3?

Polymath3 now active7 comments

Terence Tao wrote 2 years ago: Gil Kalai has officially started the Polymath3 project (Polynomial Hirsch conjecture) with a researc … more →

Tags: math.CO, polymath, Polymath3?, set systems

Polymath 3: Polynomial Hirsch Conjecture117 comments

Gil Kalai wrote 2 years ago: I would like to start here a research thread of the long-promised Polymath3 on the polynomial Hirsch … more →

Tags: Open problems, convex polytopes, Open Discussion, Polymath3?

"A Counterexample to the Hirsch Conjecture," is Now Out2 comments

Gil Kalai wrote 2 years ago:   Francisco (Paco) Santos’s paper “A Counterexample to the Hirsch Conjecture” is n … more →

Tags: convex polytopes, Francisco Santos

Plans for polymath34 comments

Gil Kalai wrote 3 years ago: Polymath3 is planned to study the polynomial Hirsch conjecture. In order not to conflict with Tim Go … more →

Tags: convex polytopes, Polymath3?

The Polynomial Hirsch Conjecture: Discussion Thread, Continued 16 comments

Gil Kalai wrote 3 years ago: Here is a  link for the just-posted paper Diameter of Polyhedra: The Limits of Abstraction by Freidr … more →

Tags: Open problems, convex polytopes, Open Discussion

The Polynomial Hirsch Conjecture: Discussion Thread117 comments

Gil Kalai wrote 3 years ago: This post is devoted to the polymath-proposal about the polynomial Hirsch conjecture. My intention i … more →

Tags: convex polytopes, Open Discussion, Open problems, Polytopes

The Polynomial Hirsch Conjecture - How to Improve the Upper Bounds.14 comments

Gil Kalai wrote 3 years ago: I can see three main avenues toward making progress on the Polynomial Hirsch conjecture. One directi … more →

Tags: Open problems, convex polytopes, Open Discussion, discussion

The Polynomial Hirsch Conjecture, a Proposal for Polymath3 (Cont.)5 comments

Gil Kalai wrote 3 years ago: The Abstract Polynomial Hirsch Conjecture A convex polytope is the convex hull of a finite set of po … more →

Tags: Open problems, convex polytopes, Open Discussion, polymath proposals

The Polynomial Hirsch Conjecture: A proposal for Polymath338 comments

Gil Kalai wrote 3 years ago: This post is continued here.  Eddie Kim and Francisco Santos have just uploaded a survey article on … more →

Tags: Open problems, convex polytopes, Open Discussion, Linear Programming, Polytopes, polymath proposals

A Diameter problem (7): The Best Known Bound1 comment

Gil Kalai wrote 4 years ago:   Our Diameter problem for families of sets Consider a family of subsets of size d of the set N={1,2 … more →

Tags: Combinatorics, convex polytopes, Linear Programming

A Diameter Problem (6): Abstract Objective Functions7 comments

Gil Kalai wrote 4 years ago: George Dantzig and Leonid Khachyan In this part we will not progress on the diameter problem that we … more →

Tags: Combinatorics, Open problems, convex polytopes, Linear Programming

A Diameter Problem (5)1 comment

Gil Kalai wrote 4 years ago: 6. First subexponential bounds.  Proposition 1: How to prove it: This is easy to prove: Given two se … more →

Tags: Combinatorics, Open problems, convex polytopes

Diameter Problem (4)1 comment

Gil Kalai wrote 4 years ago: Let us consider another strategy to deal with our diameter problem. Let us try to associate other gr … more →

Tags: Combinatorics, Open problems, convex polytopes


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