Results 11 to 20 of about 4,146,228 (289)

The use of normal forms for analysing nonlinear mechanical vibrations. [PDF]

open access: yesPhilos Trans A Math Phys Eng Sci, 2015
Neild SA   +4 more
europepmc   +2 more sources

Gauss-Manin Connections for Boundary Singularities and Isochore Deformations

open access: yesDemonstratio Mathematica, 2015
We study here the relative cohomology and the Gauss-Manin connections associated to an isolated singularity of a function on a manifold with boundary, i.e. with a fixed hyperplane section.
Kourliouros Konstantinos
doaj   +1 more source

Normal forms of vector fields on Poisson manifolds [PDF]

open access: yes, 2006
We study formal and analytic normal forms of radial and Hamiltonian vector fields on Poisson manifolds near a singular point.Comment: Final ...
Monnier, Philippe, Zung, Nguyen Tien
core   +2 more sources

Probabilistic Rewriting and Asymptotic Behaviour: on Termination and Unique Normal Forms [PDF]

open access: yesLogical Methods in Computer Science, 2022
While a mature body of work supports the study of rewriting systems, abstract tools for Probabilistic Rewriting are still limited. In this paper we study the question of uniqueness of the result (unique limit distribution), and develop a set of proof ...
Claudia Faggian
doaj   +1 more source

Volume-preserving normal forms of Hopf-zero singularity [PDF]

open access: yes, 2013
A practical method is described for computing the unique generator of the algebra of first integrals associated with a large class of Hopf-zero singularity.
Algaba A   +16 more
core   +2 more sources

Direct Normal Form Analysis of Oscillators with Different ‎Combinations of Geometric Nonlinear Stiffness Terms [PDF]

open access: yesJournal of Applied and Computational Mechanics, 2021
Nonlinear oscillators with geometric stiffness terms can be used to model a range of structural elements such as cables, beams and plates. In particular, single-degree-of-freedom (SDOF) systems are commonly studied in the literature by means of different
Ayman Nasir, Neil Sims, David Wagg
doaj   +1 more source

Normal Forms for Symplectic Maps with Twist Singularities [PDF]

open access: yes, 2005
We derive a normal form for a near-integrable, four-dimensional symplectic map with a fold or cusp singularity in its frequency mapping. The normal form is obtained for when the frequency is near a resonance and the mapping is approximately given by the ...
A.V. Ivanov   +22 more
core   +3 more sources

Reversible-equivariant systems and matricial equations

open access: yesAnais da Academia Brasileira de Ciências, 2011
This paper uses tools in group theory and symbolic computing to classify the representations of finite groups with order lower than, or equal to 9 that can be derived from the study of local reversible-equivariant vector fields in 4 .
Marco A Teixeira, Ricardo M Martins
doaj   +1 more source

Normal Forms of Conditional Belief Bases Respecting Inductive Inference

open access: yesProceedings of the International Florida Artificial Intelligence Research Society Conference, 2022
Normal forms of syntactic entities play an important role in many different areas in computer science. In this paper, we address the question of how to obtain normal forms and minimal normal forms of conditional belief bases in order to, e.g., ease ...
Christoph Beierle, Jonas Haldimann
doaj   +1 more source

On variables with few occurrences in conjunctive normal forms [PDF]

open access: yes, 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
core   +1 more source

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