Results 211 to 220 of about 15,432 (253)

A Bayesian Nonparametric Approach to Test Equating

Psychometrika, 2009
Bayesian nonparametrics, bivariate Bernstein polynomial prior, Dirichlet process prior, test equating, equipercentile equating, linear equating,
Stephen G. Walker, George Karabatsos
exaly   +2 more sources

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Pattern Equations and Equations with Stuttering

1999
Word equation in a special form X = A, where X is a sequence of variables and A is a sequence of constants, is considered. The problem whether X = A has a solution over a free monoid (Pattern- Equation problem) is shown to be NP-complete. It is also shown that disjunction of a special type equation systems and conjunction of the general ones can be ...
Ivana Cerná, Ondrej Klíma 0001, Jirí Srba   +2 more
openaire   +3 more sources

Equations of State and Constitutive Equations

Journal of Rheology, 1986
Equations-of state information in the otherwise undeformed state as a starting point for the development of constitutive equations is considered in addition to thermodynamics, free energy functions, and conceptual difficulties including the definition of reference states for strain.
Landel, Robert F., Peng, Steven T. J.
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George Dantzig: Equations, Equations, and Equations

2013
Dantzig was the progenitor of the simplex method for linear programming. A viewpoint in his spirit approaching P versus NP entirely via linear equations is presented and defended.
Richard J. Lipton, Kenneth W. Regan
openaire   +1 more source

Heun’s Equation and the Hypergeometric Equation

SIAM Journal on Mathematical Analysis, 1979
The present investigation determines under which circumstances Heun’s equation can be derived from the hypergeometric equation by rational substitutions.
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On Approximation of Equations by Algebraic Equations

Journal of the Society for Industrial and Applied Mathematics Series B Numerical Analysis, 1964
Some years ago D. I. Muller [1] developed a method for the solution of algebraic equations, approximating them by quadratic equations. The method proved extremely efficient in many tests. However, the theoretical discussion given by Muller can hardly be considered as adequate, in my opinion, as his convergence proof culminates in a vicious circle (cf ...
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Solving equations in an equational language

1988
The problem of solving equations is a key and challenging problem in many formalisms of integrating logic and functional programming, while narrowing is now a widely used mechanism for generating solutions. In this paper, we continue to investigate the problem of solving equations in O'Donnell's equational language.
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On the Reduction of Differential Equations to Algebraic Equations

SIAM Journal on Mathematical Analysis, 1970
Abstract : Techniques based upon elementary group theory for the reduction of a given system of partial differential equations to a system of differential equations in fewer independent variables are extended in this report. Specifically, the extension is aimed at reducing a given system to a system of algebraic equations. (Author)
Moran, M. J., Gaggioli, R. A.
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A differential-equations algorithm for nonlinear equations

ACM Transactions on Mathematical Software, 1984
Summary: DAFNE is a set of FORTRAN subprograms for solving nonlinear equations that implements a method founded on the numerical solution of a Cauchy problem for a system of ordinary differential equations inspired by classical mechanics. This paper gives a detailed description of the method as implemented in DAFNE and reports on the numerical tests ...
Filippo Aluffi-Pentini, Valerio Parisi, Francesco Zirilli   +2 more
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Equational Logic

IEEE Transactions on Computers, 1974
A combinational circuit realizing the switching function f(x) may be regarded as a solution verifier for the Boolean equation f(x) = 1. (*) The output of the circuit is 1, that is, if and only if the input-vector x is a solution for (*). We use the term "equational logic" to denote an approach to circuit synthesis based on (*) rather than on the ...
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