Results 11 to 20 of about 20,784,699 (275)
Cover results and normal forms [PDF]
, 1977 The purpose of this paper was to sketch an area of problems for the concept of cover. We showed that in spite of some remarks in the literature the problem of covering (unambiguous and -free) cfg's with cfg's in GNF is open.
Nijholt, A.
core +2 more sources
Coupled cell networks: Semigroups, Lie algebras and normal forms [PDF]
, 2012 We introduce the concept of a semigroup coupled cell network and show that the collection of semigroup network vector fields forms a Lie algebra. This implies that near a dynamical equilibrium the local normal form of a semigroup network is a semigroup ...
Bob W. Rink, J. Sanders
semanticscholar +1 more source
Normal forms and entanglement measures for multipartite quantum states [PDF]
, 2003 A general mathematical framework is presented to describe local equivalence classes of multipartite quantum states under the action of local unitary and local filtering operations.
A. Acín +17 more
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Normal forms of Hopf-zero singularity [PDF]
, 2012 The Lie algebra generated by Hopf-zero classical normal forms is decomposed into two versal Lie subalgebras. Some dynamical properties for each subalgebra are described; one is the set of all volume-preserving conservative systems while the other is the ...
M. Gazor, Fahimeh Mokhtari
semanticscholar +1 more source
On variables with few occurrences in conjunctive normal forms [PDF]
, 2011 We consider the question of the existence of variables with few occurrences in boolean conjunctive normal forms (clause-sets). Let mvd(F) for a clause-set F denote the minimal variable-degree, the minimum of the number of occurrences of variables.
C.A. Tovey +8 more
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, 2015 We discuss the history of the monodromy theorem, starting from Weierstra\ss, and the concept of monodromy group. From this viewpoint we compare then the Weierstra\ss , the Legendre and other normal forms for elliptic curves, explaining their geometric ...
Catanese, Fabrizio
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Global periodicity conditions for maps and recurrences via Normal Forms [PDF]
, 2012 We face the problem of characterizing the periodic cases in parametric families of (real or complex) rational diffeomorphisms having a fixed point. Our approach relies on the Normal Form Theory, to obtain necessary conditions for the existence of a ...
ANNA CIMA +10 more
core +6 more sources
Disjunctive bases: normal forms and model theory for modal logics [PDF]
, 2019 We present the concept of a disjunctive basis as a generic framework for normal forms in modal logic based on coalgebra. Disjunctive bases were defined in previous work on completeness for modal fixpoint logics, where they played a central role in the ...
Enqvist, Sebastian, Venema, Yde
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Normal forms for Hopf-Zero singularities with nonconservative nonlinear part [PDF]
, 2011 In this paper we are concerned with the simplest normal form computation of the systems (0.1) x ˙ = 2 x f ( x , y 2 + z 2 ) , y ˙ = z + y f ( x , y 2 + z 2 ) , z ˙ = − y + z f ( x , y 2 + z 2 ) , where f is a formal function with real coefficients and ...
M. Gazor, Fahimeh Mokhtari, J. Sanders
semanticscholar +1 more source
Normal forms for Answer Sets Programming
, 2004 Normal forms for logic programs under stable/answer set semantics are introduced. We argue that these forms can simplify the study of program properties, mainly consistency.
Costantini, Stefania +1 more
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