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» Connections between Relation Algebras and Cylindric Algebras
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ISSAC
2004
Springer
67views Mathematics» more  ISSAC 2004»
15 years 4 months ago
Rational general solutions of algebraic ordinary differential equations
We give a necessary and sufficient condition for an algebraic ODE to have a rational type general solution. For an autonomous first order ODE, we give an algorithm to compute a r...
Ruyong Feng, Xiao-Shan Gao
AISC
1992
Springer
15 years 3 months ago
A Type-Coercion Problem in Computer Algebra
Abstract. An important feature of modern computer algebra systems is the support of a rich type system with the possibility of type inference. Basic features of such a type system ...
Andreas Weber
SAC
2009
ACM
15 years 6 months ago
Origami fold as algebraic graph rewriting
We formalize paper fold (origami) by graph rewriting. Origami construction is abstractly described by a rewriting sys), where O is the set of abstract origami’s and ary relation...
Tetsuo Ida, Hidekazu Takahashi
ECAI
2000
Springer
15 years 2 months ago
Qualitative Spatial Reasoning about Line Segments
Abstract. Representing and reasoning about orientation information is an important aspect of qualitative spatial reasoning. We present a novel approach for dealing with intrinsic o...
Reinhard Moratz, Jochen Renz, Diedrich Wolter
COSIT
2009
Springer
179views GIS» more  COSIT 2009»
15 years 5 months ago
An Algebraic Approach to Image Schemas for Geographic Space
Formal models of geographic space should support reasoning about its static and dynamic properties, its objects, their behaviors, and the relationships between them. Image schemas,...
Lisa Walton, Michael F. Worboys