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» An approximation ratio for biclustering
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ISPD
1998
ACM
107views Hardware» more  ISPD 1998»
15 years 4 months ago
Sequence-pair based placement method for hard/soft/pre-placed modules
This paper proposes a placement method for a mixed set of hard, soft, and pre-placed modules, based on a placement topology representation called sequence-pair. Under one sequence...
Hiroshi Murata, Ernest S. Kuh
94
Voted
CCCG
2008
15 years 1 months ago
Improved Bounds on the Average Distance to the Fermat-Weber Center of a Convex Object
We show that for any convex object Q in the plane, the average distance between the Fermat-Weber center of Q and the points in Q is at least 4(Q)/25, and at most 2(Q)/(3 3), wher...
A. Karim Abu-Affash, Matthew J. Katz
DMTCS
2003
89views Mathematics» more  DMTCS 2003»
15 years 1 months ago
On the Monotonic Computability of Semi-computable Real Numbers
Let h : N → Q be a computable function. A real number x is h-monotonically computable (h-mc, for short) if there is a computable sequence (xs) of rational numbers which converges...
Xizhong Zheng, George Barmpalias
CORR
2010
Springer
113views Education» more  CORR 2010»
14 years 12 months ago
Opaque sets
The problem of finding "small" sets that meet every straight-line which intersects a given convex region was initiated by Mazurkiewicz in 1916. We call such a set an opa...
Adrian Dumitrescu, János Pach
JCSS
2006
89views more  JCSS 2006»
14 years 12 months ago
Ramsey-type theorems for metric spaces with applications to online problems
A nearly logarithmic lower bound on the randomized competitive ratio for the metrical task systems problem is presented. This implies a similar lower bound for the extensively stu...
Yair Bartal, Béla Bollobás, Manor Me...