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CORR
1999
Springer
93views Education» more  CORR 1999»
13 years 7 months ago
On the Power of Positive Turing Reductions
: In the early 1980s, Selman's seminal work on positive Turing reductions showed that positive Turing reduction to NP yields no greater computational power than NP itself. Thu...
Edith Hemaspaandra
CORR
2000
Springer
133views Education» more  CORR 2000»
13 years 7 months ago
On Exponential-Time Completeness of the Circularity Problem for Attribute Grammars
Attribute grammars (AGs) are a formal technique for defining semantics of programming languages. Existing complexity proofs on the circularity problem of AGs are based on automata...
Pei-Chi Wu
CIE
2009
Springer
14 years 1 months ago
Ordinal Computability
computability uses ordinals instead of natural numbers in abstract machines like register or Turing machines. We give an overview of the computational strengths of α-β-machines,...
Peter Koepke
CIE
2005
Springer
14 years 27 days ago
The Transfinite Action of 1 Tape Turing Machines
• We produce a classification of the pointclasses of sets of reals produced by infinite time turing machines with 1-tape. The reason for choosing this formalism is that it appa...
Philip D. Welch
CORR
2008
Springer
94views Education» more  CORR 2008»
13 years 9 months ago
Small Turing universal signal machines
geometrical computation 4: small Turing universal signal machines J
Jérôme Durand-Lose