Results 241 to 250 of about 10,993,960 (288)

Decidability of fourth-order matching

Mathematical Structures in Computer Science, 2000
Higher Order Matching consists of solving finite sets of equations of the form u =βηv, where u, v are simply typed terms of λ-calculus, and v is a closed term. Whether this problem is decidable is an open question. In this paper its decidability is proved when the free variables of all equations are of order at most 4 – we actually extend this ...
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Asymptotic Properties of Solutions of Fourth-Order Delay Differential Equations

Symmetry, 2019
In the paper, we study the oscillation of fourth-order delay differential equations, the present authors used a Riccati transformation and the comparison technique for the fourth order delay differential equation, and that was compared with the ...
Sandra Pinelas, Clemente Cesarano, Omar Bazighifan   +2 more
exaly   +2 more sources

A fourth-order poisson solver

Journal of Computational Physics, 1984
High order finite difference approximations (Hodie, OCI, SCHOS, Collatz's Mehrstellenverfahren) have been proposed for various partial differential equations. All reduce to the last for the Poisson equation. The accuracy and computational efficiency of these are compared for a test problem.
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A Fourth Order Reaction

Nature, 1948
IN a study of the reactions of metal complexes with hydrogen peroxide, in particular the system Fe3+, αα'-dipyridyl which gives the "Katalasestoss" reported by Kuhn and Wassermann1, we found it necessary to obtain data on the equilibrium and kinetics of formation of the red ferrous complex ion, Fe(Dipy)32+, formed according to the reaction : A recent
J. H. BAXENDALE, PHILIP GEORGE
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Virtual control for fourth-order problems and for heterogeneous fourth-order second-order coupling

2003
We consider both approximation of fourth-order problems derived, e.g., the Kirchoff plate model, and heterogeneous coupling between a fourth-order problem and a reduced second-order problem, describing a plate-membrane model. The multidomain virtual control approach is used. This paper is devoted to the analysis and construction of the cost function al
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Fourth-Order Problems

2019
Here we will discuss Dirichlet boundary value problems with fourth-order elliptic differential equations of the ...
Mitsuhiro T. Nakao, Michael Plum, Yoshitaka Watanabe   +2 more
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Fourth order rotatability

Communications in Statistics - Simulation and Computation, 1985
Fourth order rotatable designs are discussed. A general k, design moment inequality is given. The variance function for two-factor designs is derived, and plotted for a specific design. A minimum point set requirement for two-factor designs is established, thus enabling one to form an infinity of such designs. Some difficulties in obtaining deLigns for
Norman R. Draper, Agnes M. Herzberg
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A fourth‐order extrapolation method for special nonlinear fourth‐order boundary value problems

Communications in Applied Numerical Methods, 1986
AbstractA fourth‐order convergent finite difference method is developed for the numerical solution of the nonlinear fourth‐order boundary value problem y(iv)(x) = f(x,y), a < x < b, y(a) = Ao,y″(a) = Bo, y(b) = A1, y″(b) = B1. The method is based on a second‐order converget method which is used on two grids, fourth‐order convergence being ...
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Quantum theory of fourth-order interference

Physical Review A, 1988
The quantum theory of fourth-order interference of light is presented in a general format and compared with classical wave theory. The conditions under which nonclassical phenomena occur are discussed. In particular, the interference between the quantum field and classical field may give rise to a nonclassical effect.
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FOURTH ORDER

AIAA Computational Fluid Dynamics Conference, 1973
E KRAUSE, E HIRSCHEL, W KORDULLA
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