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MFCS
2009
Springer
14 years 2 months ago
The Isomorphism Problem for k-Trees Is Complete for Logspace
Abstract. We show that k-tree isomorphism can be decided in logarithmic space by giving a logspace canonical labeling algorithm. This improves over the previous StUL upper bound an...
Johannes Köbler, Sebastian Kuhnert
ENDM
2010
127views more  ENDM 2010»
13 years 7 months ago
MPQ-trees for orthogonal packing problem
Finding a feasible solution for a bi-dimensional Orthogonal Packing Problem (OPP2) consists in deciding whether a set of rectangular boxes (items) can be packed in a "big&quo...
Cédric Joncour, Arnaud Pêcher, Petru ...
COMPGEOM
1991
ACM
13 years 11 months ago
The Two Guards Problem
Given a simple polygon in the plane with two distinguished vertices, s and g, is it possible for two guards to simultaneously walk along the two boundary chains from s to g in suc...
Christian Icking, Rolf Klein
IJCGA
2006
85views more  IJCGA 2006»
13 years 7 months ago
Some Lower Bounds on Geometric Separability Problems
We obtain lower bounds in the algebraic computation tree model for deciding the separability of two disjoint point sets. In particular, we show (n log n) time lower bounds for sep...
Esther M. Arkin, Ferran Hurtado, Joseph S. B. Mitc...
POPL
2010
ACM
14 years 5 months ago
On the Verification Problem for Weak Memory Models
We address the verification problem of finite-state concurrent programs running under weak memory models. These models capture the reordering of program (read and write) operation...
Ahmed Bouajjani, Madanlal Musuvathi, Mohamed Faouz...