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133
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JCT
2010
15 years 4 months ago
2010
A k-orbit map is a map with k flag-orbits under the action of its automorphism group. We give a basic theory of k-orbit maps and classify them up to k 4. “Hurwitz-like” upper...
141
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SCL
2010
15 years 4 months ago
2010
We deal with dynamic equations on time scales, where we characterize the positivity of a system. Uniform exponential stability of a system is determined by the spectrum of its mat...
143
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ACL
2010
15 years 4 months ago
2010
This paper proposes an approach to reference resolution in situated dialogues by exploiting extra-linguistic information. Recently, investigations of referential behaviours involv...
185
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AMSTERDAM
2009
15 years 3 months ago
2009
An argument by Kratzer (2000) based on Schein (1986, 1993) does not conclusively show that events and thematic roles are necessary ingredients of the logical representation of natu...
169
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ECIS
2000
15 years 7 months ago
2000
Definitions of electronic commerce are many and varied. They indicate a lack of consensus about what electronic commerce is. `A `definition' implies a direct and unproblematic...