4397 search results - page 306 / 880 » Relational Algebra Operations |
112
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FUIN
2007
15 years 4 months ago
2007
We give formulations for modal deductive databases and present a modal query language called MDatalog. We define modal relational algebras and give the seminaive evaluation algor...
128
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TSP
2008
15 years 4 months ago
2008
Abstract--We consider the problem of linear zero-forcing precoding design and discuss its relation to the theory of generalized inverses in linear algebra. Special attention is giv...
127
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COMBINATORICS
2004
15 years 4 months ago
2004
We extend Schaeffer's bijection between rooted quadrangulations and welllabeled trees to the general case of Eulerian planar maps with prescribed face valences to obtain a bi...
115
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MLQ
2000
15 years 4 months ago
2000
It is well known that the model categories of universal Horn theories are locally presentable, hence essentially algebraic [2]. In the special case of quasivarieties a direct tran...
149
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IPL
2002
15 years 4 months ago
2002
We consider the problem of decomposing polygons (with holes) into various types of simpler polygons. We focus on the problem of partitioning a rectilinear polygon, with holes, int...