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COMPGEOM
2011
ACM
14 years 8 months ago
Integer representations of convex polygon intersection graphs
Abstract. We study the grid size that is needed to represent intersection graphs of convex polygons. Here the polygons are similar to a base polygon P whose corners have rational c...
Tobias Müller, Erik Jan van Leeuwen, Jan van ...
CPAIOR
2009
Springer
15 years 11 months ago
Reformulating Global Grammar Constraints
An attractive mechanism to specify global constraints in rostering and other domains is via formal languages. For instance, the REGULAR and GRAMMAR constraints specify constraints ...
George Katsirelos, Nina Narodytska, Toby Walsh
DASFAA
1999
IEEE
118views Database» more  DASFAA 1999»
15 years 8 months ago
Design and Implementation of a CORBA Query Service Accessing EXPRESS-based Data
In this paper we describe the design and implementation of a CORBA Query Service targeted to access data that is defined by the EXPRESS data modeling language. EXPRESS is used pri...
Jürgen Sellentin, Bernhard Mitschang
POPL
2004
ACM
16 years 4 months ago
A bisimulation for dynamic sealing
We define seal, an untyped call-by-value -calculus with primitives for protecting abstract data by sealing, and develop a bisimulation proof method that is sound and complete with...
Eijiro Sumii, Benjamin C. Pierce
ICFP
2005
ACM
16 years 4 months ago
Qualified types for MLF
MLF is a type system that extends a functional language with impredicative rank-n polymorphism. Type inference remains possible and only in some clearly defined situations, a loca...
Andres Löh, Daan Leijen