318 search results - page 5 / 64 » Preimage Relations and Their Matrices |
COCOON
2003
Springer
14 years 22 days ago
2003
Springer
Abstract. We show that finding roots of Boolean matrices is an NPhard problem. This answers a twenty year old question from semigroup theory. Interpreting Boolean matrices as dire...
INFORMATICALT
1998
13 years 7 months ago
1998
Abstract. We study invertibility of big n × n matrices. There exists a number of algorithms, especially in mathematical statistics and numerical mathematics, requiring to invert s...
BMVC
1996
13 years 8 months ago
1996
This paperdescribes initial work on a family of projectivereconstructiontechniques that extract projection matrices directly and linearly from matching tensors estimated from imag...
PAKDD
2009
ACM
14 years 2 months ago
2009
ACM
Abstract. We propose a new approach to modeling time-varying relational data such as e-mail transactions based on a dynamic extension of matrix factorization. To estimate effectiv...
SPATIALCOGNITION
2000
Springer
13 years 11 months ago
2000
Springer
We present an approach to spatial inference which is based on the procedural semantics of spatial relations. In contrast to qualitative reasoning, we do not use discrete symbolic m...