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» On the Number of t-Ary Trees with a Given Path Length
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JCT
2007
97views more  JCT 2007»
13 years 7 months ago
What power of two divides a weighted Catalan number?
Given a sequence of integers b = (b0,b1,b2,...) one gives a Dyck path P of length 2n the weight wt(P) = bh1 bh2 ···bhn , where hi is the height of the ith ascent of P. The corr...
Alexander Postnikov, Bruce E. Sagan
SODA
2004
ACM
151views Algorithms» more  SODA 2004»
13 years 9 months ago
Minimum moment Steiner trees
For a rectilinear Steiner tree T with a root, define its k-th moment Mk(T) = T (dT (u))k du, where the integration is over all edges of T, dT (u) is the length of the unique path ...
Wangqi Qiu, Weiping Shi
IANDC
2008
92views more  IANDC 2008»
13 years 7 months ago
Tree exploration with advice
We study the amount of knowledge about the network that is required in order to efficiently solve a task concerning this network. The impact of available information on the effici...
Pierre Fraigniaud, David Ilcinkas, Andrzej Pelc
COCOON
2005
Springer
14 years 1 months ago
Min-Energy Voltage Allocation for Tree-Structured Tasks
Westudyjobschedulingonprocessorscapableofrunningatvariablevoltage/speed tominimizeenergyconsumption.Eachjob ina probleminstanceisspecifiedbyitsarrivaltime and deadline, together w...
Minming Li, Becky Jie Liu, Frances F. Yao
INFOCOM
2009
IEEE
14 years 2 months ago
Hardness and Approximation of the Survivable Multi-Level Fat Tree Problem
—With the explosive deployment of “triple play” (voice, video and data services) over the same access network, guaranteeing a certain-level of survivability for the access ne...
Hung Q. Ngo, Thanh-Nhan Nguyen, Dahai Xu