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» Cyclic orders: Equivalence and duality
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TCS
2010
13 years 5 months ago
Alternating states for dual nondeterminism in imperative programming
The refinement calculus of Back, Morgan, Morris, and others is based on monotone predicate transformers (weakest preconditions) where conjunctions stand for demonic choices betwee...
Wim H. Hesselink
FUIN
2006
103views more  FUIN 2006»
13 years 7 months ago
A Categorical View on Algebraic Lattices in Formal Concept Analysis
Formal concept analysis has grown from a new branch of the mathematical field of lattice theory to a widely recognized tool in Computer Science and elsewhere. In order to fully be...
Pascal Hitzler, Markus Krötzsch, Guo-Qiang Zh...
COMBINATORICS
2000
96views more  COMBINATORICS 2000»
13 years 7 months ago
Automorphisms and Enumeration of Switching Classes of Tournaments
Two tournaments T1 and T2 on the same vertex set X are said to be switching equivalent if X has a subset Y such that T2 arises from T1 by switching all arcs between Y and its comp...
László Babai, Peter J. Cameron
ACTAC
1998
71views more  ACTAC 1998»
13 years 7 months ago
On the Information Content of Semi-Structured Databases
In a semi-structured database there is no clear separation between the data and the schema, and the degree to which it is structured depends on the application. Semi-structured da...
Mark Levene
ER
2007
Springer
109views Database» more  ER 2007»
13 years 11 months ago
Selfish-brain Theory: Challenges in the Top-down Analysis of Metabolic Supply Chains
The Selfish-brain theory has created the theoretical basis for the systemic analysis of the energy metabolism in terms of a supply chain. The energy in form of glucose equivalents...
Dirk Langemann