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WEA
2010
Springer
338views Algorithms» more  WEA 2010»
14 years 1 months ago
New Lower Bounds for the Vehicle Routing Problem with Simultaneous Pickup and Delivery
Abstract. This work deals with the Vehicle Routing Problem with Simultaneous Pickup and Delivery. We propose undirected and directed two-commodity flow formulations, which are bas...
Anand Subramanian, Eduardo Uchoa, Luiz Satoru Ochi
COMPGEOM
1996
ACM
13 years 11 months ago
New Lower Bounds for Convex Hull Problems in Odd Dimensions
We show that in the worst case, (ndd=2e;1 +n logn) sidedness queries are required to determine whether the convex hull of n points in IRd is simplicial, or to determine the number ...
Jeff Erickson
IPL
2002
110views more  IPL 2002»
13 years 6 months ago
New bounds on a hypercube coloring problem
In studying the scalability of optical networks, one problem which arises involves coloring the vertices of the n-cube with as few colors as possible such that any two vertices wh...
Hung Q. Ngo, Ding-Zhu Du, Ronald L. Graham
JGT
2008
92views more  JGT 2008»
13 years 7 months ago
A new upper bound for the bipartite Ramsey problem
We consider the following question: how large does n have to be to guarantee that in any two-colouring of the edges of the complete graph Kn,n there is a monochromatic Kk,k? In th...
David Conlon
COR
1998
34views more  COR 1998»
13 years 6 months ago
A new lower bounding scheme for the total weighted tardiness problem
M. Selim Akturk, M. Bayram Yildirim