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CORR
2011
Springer
137views Education» more  CORR 2011»
13 years 2 months ago
Existential witness extraction in classical realizability and via a negative translation
Abstract. We show how to extract existential witnesses from classical proofs using Krivine’s classical realizability—where classical proofs are interpreted as λ-terms with the...
Alexandre Miquel
ESEM
2007
ACM
13 years 11 months ago
How Software Designs Decay: A Pilot Study of Pattern Evolution
A common belief is that software designs decay as systems evolve. This research examines the extent to which software designs actually decay by studying the aging of design patter...
Clemente Izurieta, James M. Bieman
TLCA
2009
Springer
14 years 1 months ago
Relating Classical Realizability and Negative Translation for Existential Witness Extraction
Friedman showed how to turn a classical proof of a Σ0 1 formula into an intuitionistic proof of the same formula, thus giving an effective method to extract witnesses from classi...
Alexandre Miquel
DCG
2007
102views more  DCG 2007»
13 years 7 months ago
How to Exhibit Toroidal Maps in Space
Steinitz’s Theorem states that a graph is the 1-skeleton of a convex polyhedron if and only if it is 3-connected and planar. The polyhedron is called a geometric realization of ...
Dan Archdeacon, C. Paul Bonnington, Joanna A. Elli...
AUTOMATICA
2005
78views more  AUTOMATICA 2005»
13 years 7 months ago
Problems on time-varying port-controlled Hamiltonian systems: geometric structure and dissipative realization
To apply time-varying port-controlled Hamiltonian (PCH) systems to practical control designs, two basic problems should be dealt with: one is how to provide such time-varying syst...
Yuzhen Wang, Daizhan Cheng, Xiaoming Hu