Results 21 to 30 of about 468,745 (232)
Numerical methods for singularly perturbed elliptic problems containing two perturbation parameters
Mathematical Modelling and Analysis, 2006 A priori parameter explicit bounds on the derivatives of the solution of a two parameter singularly perturbed elliptic problem in two space dimensions are presented. These bounds are used to establish parameter uniform error bounds for a numerical method
E. O'Riordan +2 more
doaj +1 more source
Bounds on Effective Dynamic Properties of Elastic Composites [PDF]
, 2012 We present general, computable, improvable, and rigorous bounds for the total energy of a finite heterogeneous volume element or a periodically distributed unit cell of an elastic composite of any known distribution of inhomogeneities of any geometry and
Altay +20 more
core +1 more source
Non ultracontractive heat kernel bounds by Lyapunov conditions [PDF]
, 2013 Nash and Sobolev inequalities are known to be equivalent to ultracontractive properties of heat-like Markov semigroups, hence to uniform on-diagonal bounds on their kernel densities.
Bolley, François +2 more
core +3 more sources
Generating functions and the satisfiability threshold [PDF]
Discrete Mathematics & Theoretical Computer Science, 2004 The 3-SAT problem consists in determining if a boolean formula with 3 literals per clause is satisfiable. When the ratio between the number of clauses and the number of variables increases, a threshold phenomenon is observed: the probability of ...
Vincent Puyhaubert
doaj +3 more sources
An Improvement on the Upper Bounds of the Partial Derivatives of NURBS Surfaces
Mathematics, 2020 The Non-Uniform Rational B-spline (NURBS) surface not only has the characteristics of the rational Bézier surface, but also has changeable knot vectors and weights, which can express the quadric surface accurately.
Ye Tian +4 more
doaj +1 more source
Weighted Nash Inequalities [PDF]
, 2010 Nash or Sobolev inequalities are known to be equivalent to ultracontractive properties of Markov semigroups, hence to uniform bounds on their kernel densities.
Bakry, Dominique +3 more
core +6 more sources
Complexity, 2021 The stabilization problem of a macroeconomic dynamical system is considered in this paper. The main features of this system are that the system uncertainties may be unknown functions of state and time but with known bounds.
Xiaorui Xie, Ye-Hwa Chen
doaj +1 more source
On the speed of approach to equilibrium for a collisionless gas [PDF]
, 2010 We investigate the speed of approach to Maxwellian equilibrium for a collisionless gas enclosed in a vessel whose wall are kept at a uniform, constant temperature, assuming diffuse reflection of gas molecules on the vessel wall. We establish lower bounds
A. V. Bobylev +16 more
core +6 more sources
Uniform Bounds for Bessel Functions [PDF]
Journal of Applied Analysis, 2006 Summary: For \(\nu>-1/2\) and \(x\) real we shall establish explicit bounds for the Bessel function \(J_\nu(x)\) which are uniform in \(x\) and \(\nu\). This work and the recent result of \textit{L. J. Landau} [J. Lond. Math. Soc. (2) 61, No. 1, 197--215 (2000; Zbl 0948.33001)] provide relatively sharp inequalities for all real \(x\).
openaire +2 more sources
On Uniformity and Circuit Lower Bounds [PDF]
computational complexity, 2014 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Santhanam, Rahul, Williams, Ryan
openaire +2 more sources