A Continuous d-Step Conjecture for Polytopes

The curvature of a polytope, defined as the largest possible total curvature of the associated central path, can be regarded as a continuous analogue of its diameter. We prove an analogue of the result of Klee and Walkup. Namely, we show that if the order of the curvature is less than the dimension d for all polytopes defined by 2d inequalities and for all d, then the order of the curvature is less that the number of inequalities for all polytopes.

[1]  Tamás Terlaky,et al.  Central Path Curvature and Iteration-Complexity for Redundant Klee—Minty Cubes , 2009 .

[2]  Josef Stoer,et al.  On the complexity of following the central path of linear programs by linear extrapolation II , 1991, Math. Program..

[3]  K. Brown,et al.  Graduate Texts in Mathematics , 1982 .

[4]  Michael Shub,et al.  On the Curvature of the Central Path of Linear Programming Theory , 2003, Found. Comput. Math..

[5]  G. C. Shephard,et al.  Convex Polytopes , 1969, The Mathematical Gazette.

[6]  G. Ziegler Lectures on Polytopes , 1994 .

[7]  J. D. Tardós,et al.  Publish or Perish , 1987 .

[8]  Victor Klee,et al.  Many Polytopes Meeting the Conjectured Hirsch Bound , 1998, Discret. Comput. Geom..

[9]  G. Kalai,et al.  A quasi-polynomial bound for the diameter of graphs of polyhedra , 1992, math/9204233.

[10]  Tamás Terlaky,et al.  Polytopes and arrangements: Diameter and curvature , 2008, Oper. Res. Lett..

[11]  M. Spivak A comprehensive introduction to differential geometry , 1979 .

[12]  Kerstin Fritzsche,et al.  More polytopes meeting the conjectured Hirsch bound , 1999, Discret. Math..

[13]  James Renegar,et al.  A mathematical view of interior-point methods in convex optimization , 2001, MPS-SIAM series on optimization.

[14]  V. Klee,et al.  Thed-step conjecture for polyhedra of dimensiond<6 , 1967 .

[15]  R. Freund Review of A mathematical view of interior-point methods in convex optimization, by James Renegar, SIAM, Philadelphia, PA , 2004 .

[16]  Nesa L'abbe Wu,et al.  Linear programming and extensions , 1981 .

[17]  C. Roos,et al.  Interior Point Methods for Linear Optimization , 2005 .