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160
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ENTCS
2008
15 years 6 months ago
2008
We introduce a general model of refinement. This is defined in terms of what contexts an entity can appear in, and what observations can be made of it in those contexts. We show e...
177
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CORR
2006
Springer
15 years 6 months ago
2006
Springer
Lie group theory states that knowledge of a m-parameters solvable group of symmetries of a system of ordinary differential equations allows to reduce by m the number of equation. ...
149
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CORR
2007
Springer
15 years 6 months ago
2007
Springer
Let S be an ordered set of disjoint unit spheres in R3 . We show that if every subset of at most six spheres from S admits a line transversal respecting the ordering, then the ent...
187
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CORR
2007
Springer
15 years 6 months ago
2007
Springer
We prove that the single-player game clobber is solvable in linear time when played on a line or on a cycle. For this purpose, we show that this game is equivalent to an optimizat...
191
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IJUFKS
2006
15 years 6 months ago
2006
One of the most common performance measures in selection and management of projects is the Net Present Value (NPV). In the paper, we study a case when initial data about the NPV p...