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STACS
2009
Springer
15 years 5 months ago
On Local Symmetries and Universality in Cellular Automata
Cellular automata (CA) are dynamical systems defined by a finite local rule but they are studied for their global dynamics. They can exhibit a wide range of complex behaviours an...
Laurent Boyer, Guillaume Theyssier
FMCO
2007
Springer
15 years 5 months ago
Universe Types for Topology and Encapsulation
The Universe Type System is an ownership type system for object-oriented programming languages that hierarchically structures the object store; it is used to reason modularly about...
Dave Cunningham, Werner Dietl, Sophia Drossopoulou...
ENTCS
2007
132views more  ENTCS 2007»
14 years 11 months ago
The Category Theoretic Understanding of Universal Algebra: Lawvere Theories and Monads
Lawvere theories and monads have been the two main category theoretic formulations of universal algebra, Lawvere theories arising in 1963 and the connection with monads being esta...
Martin Hyland, John Power
TIT
2002
72views more  TIT 2002»
14 years 10 months ago
Universal codes for finite sequences of integers drawn from a monotone distribution
We offer two noiseless codes for blocks of integers Xn = (X1, . . . , Xn). We provide explicit bounds on the relative redundancy that are valid for any distribution F in the class...
Dean P. Foster, Robert A. Stine, Abraham J. Wyner
MCU
2004
59views Hardware» more  MCU 2004»
15 years 11 days ago
On the Complexity of Universal Programs
Abstract. This paper provides a framework enabling to define and determine the complexity of various universal programs U for various machines. The approach consists of first defin...
Alain Colmerauer