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» Inequalities from Two Rows of a Simplex Tableau
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IPCO
2007
109views Optimization» more  IPCO 2007»
13 years 9 months ago
Inequalities from Two Rows of a Simplex Tableau
In this paper we explore the geometry of the integer points in a cone rooted at a rational point. This basic geometric object allows us to establish some links between lattice poin...
Kent Andersen, Quentin Louveaux, Robert Weismantel...
MP
2010
126views more  MP 2010»
13 years 6 months ago
Two row mixed-integer cuts via lifting
Recently, Andersen et al. [1], Borozan and Cornu´ejols [7] and Cornu´ejols and Margot [10] characterized extreme inequalities of a system of two rows with two free integer varia...
Santanu S. Dey, Laurence A. Wolsey
MP
2008
105views more  MP 2008»
13 years 7 months ago
On the strength of Gomory mixed-integer cuts as group cuts
Gomory mixed-integer (GMI) cuts generated from optimal simplex tableaus are known to be useful in solving mixed-integer programs. Further, it is well-known that GMI cuts can be de...
Sanjeeb Dash, Oktay Günlük
BROADNETS
2007
IEEE
14 years 1 months ago
Optimizing dimensionality and accelerating landmark positioning for coordinates based RTT predictions
Abstract— In this paper we analyze the positioning of landmarks in coordinates-based Internet distance prediction approaches with focus on Global Network Positioning (GNP). We sh...
Dragan Milic, Torsten Braun
ATMOS
2007
119views Optimization» more  ATMOS 2007»
13 years 9 months ago
Models for Railway Track Allocation
The optimal track allocation problem (OPTRA) is to find, in a given railway network, a conflict free set of train routes of maximum value. We study two types of integer programmi...
Ralf Borndörfer, Thomas Schlechte