Results 21 to 30 of about 196,377 (258)

Bipotentials for non monotone multivalued operators: fundamental results and applications [PDF]

, 2008
This is a survey of recent results about bipotentials representing multivalued operators. The notion of bipotential is based on an extension of Fenchel's inequality, with several interesting applications related to non associated constitutive laws in non
Buliga, Marius, de Saxce, Gery, Vallee, Claude   +2 more
core   +5 more sources

Iterative oscillation tests for difference equations with several non-monotone arguments [PDF]

Journal of Difference Equations and Applications, 2015
Sufficient oscillation conditions involving $\limsup $ and $\liminf $ for first-order differential equations with several non-monotone deviating arguments and nonnegative coefficients are obtained. The results are based on the iterative application of the Gr nwall inequality. Examples illustrating the significance of the results are also given.
Braverman, Elena, Chatzarakis, George E, Stavroulakis, Ioannis P   +2 more
openaire   +5 more sources

Analysis of the bulk creep influence on stress-strain curves under tensile loadings at constant rates and on Poisson's ratio evolution based on the linear viscoelasticity theory

Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2019
The Boltzmann–Volterra linear constitutive equation for isotropic non-aging viscoelastic materials is studied analytically in order to elucidate its abilities to provide a qualitative simulation of rheological effects related to different behavior types ...
Andrew Vladimirovich Khokhlov
doaj   +3 more sources

Properties of the strain rate sensitivity function produced by the linear viscoelasticity theory and existence of its maximum with respect to strain and strain rate

Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2020
Strain rate sensitivity of stress-strain curves family generated by the Boltzmann–Volterra linear viscoelasticity constitutive equation (with an arbitrary relaxation modulus) under uni-axial loadings at constant strain rates is studied analytically as ...
Andrew Vladimirovich Khokhlov
doaj   +1 more source

Differential equations with several non-monotone arguments: An oscillation result

Applied Mathematics Letters, 2017
First-order linear differential equations with multiple non-monotone delay arguments are studied. A new oscillation criterion is derived using the monotonicity analysis. An example is given to illustrate the result.
Chatzarakis, G. E., Péics, H.
openaire   +2 more sources

Oscillations of nonlinear differential equations with several deviating arguments

Electronic Journal of Qualitative Theory of Differential Equations, 2018
This article concerns the oscillatory behavior of first-order non-linear differential equations with several variable deviating arguments and non-negative coefficients.
George Chatzarakis, Julio Dix
doaj   +1 more source

Analysis of the linear viscoelasticity theory capabilities to simulate hydrostatic pressure influence on creep curves and lateral contraction ratio of rheonomous materials

Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2019
The Boltzmann-Volterra linear constitutive equation for isotropic non-aging visco-elastic materials is studied analytically in order to examine its capabilities to provide an adequate qualitative description of rheological phenomena related to creep ...
Andrew Vladimirovich Khokhlov
doaj   +1 more source

Learning pseudo-Boolean k-DNF and Submodular Functions [PDF]

, 2012
We prove that any submodular function f: {0,1}^n -> {0,1,...,k} can be represented as a pseudo-Boolean 2k-DNF formula. Pseudo-Boolean DNFs are a natural generalization of DNF representation for functions with integer range.
Raskhodnikova, Sofya, Yaroslavtsev, Grigory   +1 more
core   +2 more sources

Optimal Online Selection of a Monotone Subsequence: a Central Limit Theorem [PDF]

, 2014
Consider a sequence of $n$ independent random variables with a common continuous distribution $F$, and consider the task of choosing an increasing subsequence where the observations are revealed sequentially and where an observation must be accepted or ...
Arlotto, Alessandro, Nguyen, Vinh V., Steele, J. Michael   +2 more
core   +5 more sources

Explanations of Non-monotonic Inference in Admissibility-Based Abstract Argumentation

, 2021
In this paper, we introduce a formal framework for explaining change of inference in abstract argumentation, in particular in the context of iteratively drawing inferences from a sequence of normal expansions, with a focus on admissible set-based semantics.
Kampik, Timotheus, Čyras, Kristijonas
openaire   +3 more sources