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COMPGEOM
2010
ACM
15 years 11 months ago
Adding one edge to planar graphs makes crossing number hard
A graph is near-planar if it can be obtained from a planar graph by adding an edge. We show that it is NP-hard to compute the crossing number of near-planar graphs. The main idea ...
Sergio Cabello, Bojan Mohar
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COMPGEOM
2010
ACM
15 years 11 months ago
Output-sensitive algorithm for the edge-width of an embedded graph
Let G be an unweighted graph of complexity n cellularly embedded in a surface (orientable or not) of genus g. We describe improved algorithms to compute (the length of) a shortest...
Sergio Cabello, Éric Colin de Verdiè...
PODS
2010
ACM
207views Database» more  PODS 2010»
15 years 11 months ago
Understanding cardinality estimation using entropy maximization
Cardinality estimation is the problem of estimating the number of tuples returned by a query; it is a fundamentally important task in data management, used in query optimization, ...
Christopher Ré, Dan Suciu
WAIFI
2010
Springer
192views Mathematics» more  WAIFI 2010»
15 years 11 months ago
Type-II Optimal Polynomial Bases
In the 1990s and early 2000s several papers investigated the relative merits of polynomial-basis and normal-basis computations for F2n . Even for particularly squaring-friendly app...
Daniel J. Bernstein, Tanja Lange
DATE
2002
IEEE
95views Hardware» more  DATE 2002»
15 years 11 months ago
Optimal Transistor Tapering for High-Speed CMOS Circuits
Transistor tapering is a widely used technique applied to optimize the geometries of CMOS transistors in highperformance circuit design with a view to minimizing the delay of a FE...
Li Ding 0002, Pinaki Mazumder