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» Two disjoint negative cycles in a signed graph
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PAKDD
2010
ACM
179views Data Mining» more  PAKDD 2010»
13 years 10 months ago
Answer Diversification for Complex Question Answering on the Web
We present a novel graph ranking model to extract a diverse set of answers for complex questions via random walks over a negative-edge graph. We assign a negative sign to edge weig...
Palakorn Achananuparp, Xiaohua Hu, Tingting He, Ch...
JACM
2007
115views more  JACM 2007»
13 years 5 months ago
Optimal pants decompositions and shortest homotopic cycles on an orientable surface
We consider the problem of finding a shortest cycle (freely) homotopic to a given simple cycle on a compact, orientable surface. For this purpose, we use a pants decomposition of...
Éric Colin de Verdière, Francis Laza...
KDD
2012
ACM
201views Data Mining» more  KDD 2012»
11 years 7 months ago
Low rank modeling of signed networks
Trust networks, where people leave trust and distrust feedback, are becoming increasingly common. These networks may be regarded as signed graphs, where a positive edge weight cap...
Cho-Jui Hsieh, Kai-Yang Chiang, Inderjit S. Dhillo...
DM
2010
124views more  DM 2010»
13 years 2 months ago
Perfect dodecagon quadrangle systems
A dodecagon quadrangle is the graph consisting of two cycles: a 12-cycle (x1, x2, ..., x12) and a 4-cycle (x1, x4, x7, x10). A dodecagon quadrangle system of order n and index [D...
Lucia Gionfriddo, Mario Gionfriddo
DM
2010
99views more  DM 2010»
13 years 6 days ago
Perfect octagon quadrangle systems
An octagon quadrangle is the graph consisting of an 8-cycle (x1, x2, ..., x8) with two additional chords: the edges {x1, x4} and {x5, x8}. An octagon quadrangle system of order v ...
Luigia Berardi, Mario Gionfriddo, Rosaria Rota