Results 1 to 10 of about 78,367 (220)

Higher dimensional discrete Cheeger inequalities

open access: yesJournal of Computational Geometry, 2015
For graphs there exists a strong connection between spectral and combinatorial expansion properties. This is expressed, e.g., by the discrete Cheeger inequality, the lower bound of which states that $\lambda(G) \leq h(G)$, where $\lambda(G)$ is the ...
Anna Gundert, May Szedlák
doaj   +4 more sources

Uniform Generators, Symbolic Extensions with an Embedding, and Structure of Periodic Orbits [PDF]

open access: yesJournal of Dynamics and Differential Equations, 2018
44 ...
Burguet, David, Downarowicz, Tomasz
openaire   +3 more sources

General type of a uniform and reversible representation of chemical structures [PDF]

open access: yesAnalytica Chimica Acta, 1997
In any type of modelling (be classical or by artificial neural networks) involving chemical structures and their corresponding properties, the first problem encountered is the representation of chemical structures. A good structure representation should have different code for each 3-D structure (uniqueness), it should have the same number of variables
Jure Zupan, Marjana Novič
openaire   +1 more source

Reflectance, illumination, and appearance in color constancy

open access: yesFrontiers in Psychology, 2014
We studied color constancy using a pair of identical 3-D Color Mondrian displays. We viewed one 3-D Mondrian in nearly uniform illumination, and the other in directional, nonuniform illumination.
John J. McCann   +2 more
doaj   +1 more source

Membrane lipid composition and cellular function.

open access: yesJournal of Lipid Research, 1985
Membrane fatty acid composition, phospholipid composition, and cholesterol content can be modified in many different kinds of intact mammalian cells.
A A Spector, M A Yorek
doaj   +1 more source

Integrable Euler top and nonholonomic Chaplygin ball [PDF]

open access: yes, 2011
We discuss the Poisson structures, Lax matrices, $r$-matrices, bi-hamiltonian structures, the variables of separation and other attributes of the modern theory of dynamical systems in application to the integrable Euler top and to the nonholonomic ...
A. G. Reyman   +48 more
core   +1 more source

Simulations of Kinetic Electrostatic Electron Nonlinear (KEEN) Waves with Variable Velocity Resolution Grids and High-Order Time-Splitting [PDF]

open access: yes, 2014
KEEN waves are nonlinear, non-stationary, self-organized asymptotic states in Vlasov plasmas outside the scope or purview of linear theory constructs such as electron plasma waves or ion acoustic waves.
Afeyan, Bedros   +6 more
core   +5 more sources

Generalizations of the Recursion Theorem [PDF]

open access: yes, 2018
We consider two generalizations of the recursion theorem, namely Visser's ADN theorem and Arslanov's completeness criterion, and we prove a joint generalization of these ...
Terwijn, Sebastiaan A.
core   +3 more sources

Information theoretic syllable structure and its relation to the c-center effect [PDF]

open access: yes, 2013
Established phonological theories postulate uniform syllable constituent structures. From a traditional hierarchical point of view, syllables are right branching implying a close connection between the nucleus and the coda.
Reichel, Uwe D.
core   +1 more source

Attracting and repelling Lagrangian coherent structures from a single computation [PDF]

open access: yes, 2013
Hyperbolic Lagrangian Coherent Structures (LCSs) are locally most repelling or most attracting material surfaces in a finite-time dynamical system. To identify both types of hyperbolic LCSs at the same time instance, the standard practice has been to ...
Farazmand, Mohammad, Haller, George
core   +1 more source

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