Results 51 to 60 of about 2,801,507 (197)

On Approximating the Distribution of Quadratic Forms in Gamma Random Variables and Exponential Order Statistics [PDF]

Journal of Statistical Theory and Applications (JSTA), 2013
This paper proposes a moment-based approximation to the distribution of quadratic forms in gamma random variables. Quadratic forms in order statistics from an exponential population are considered as well.
A. Akbar Mohsenipour, Serge B. Provost
doaj   +1 more source

Algorithms for quadratic forms

Journal of Symbolic Computation, 2008
The author presents several algorithms which solve some problems appearing in the theory of quadratic forms over rational function field \(\mathbb R(t)\). The first group contains algorithms for the square-class group of \(\mathbb R(t).\) They allow to find a square-free representative of a square class of a rational function, to check if a rational ...
openaire   +1 more source

Hyers-Ulam stability of quadratic forms in 2-normed spaces

Demonstratio Mathematica, 2019
In this paper, we obtain Hyers-Ulam stability of the functional ...
Park Won-Gil, Bae Jae-Hyeong
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Energy methods for lossless systems using quadratic differential forms

, 2008
In this thesis, we study the properties of lossless systems using the concept of quadratic differential forms (QDFs). Based on observation of physical linear lossless systems, we define a lossless system as one for which there exists a QDF known as an ...
Rao, Shodhan
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Identification and signatures based on NP-hard problems of indefinite quadratic forms

Journal of Mathematical Cryptology, 2008
We prove NP-hardness of equivalence and representation problems of quadratic forms under probabilistic reductions, in particular for indefinite, ternary quadratic forms with integer coefficients.
Hartung Rupert J., Schnorr Claus-Peter
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On the Stock–Yogo Tables

Econometrics, 2018
A standard test for weak instruments compares the first-stage F-statistic to a table of critical values obtained by Stock and Yogo (2005) using simulations. We derive a closed-form solution for the expectation from which these critical values are derived,
Christopher L. Skeels, Frank Windmeijer
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Some Results on the Distribution of Quadratic Forms in Normal Variables [PDF]

The Egyptian Statistical Journal, 1959
The distributions and probability integrals of some quadratic forms applied in testing the null hypothesis (H₀) in the analysis of variance are reviewed.
S. Abd El-Aty
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On the Independence of Quadratic Forms

Journal of the Royal Statistical Society Series B: Statistical Methodology, 1966
Summary A correction is made to a paper by Good (1963) on the independence of quadratic forms.
openaire   +2 more sources

Marshall’s Quotient and the Arason–Pfister Hauptsatz for Reduced Special Groups

Mathematics
We provide a new proof of the Arason–Pfister Hauptsatz (APH) in the setting of reduced special groups, as developed by Dickmann and Miraglia. Our approach avoids the use of Boolean invariants and instead relies on a construction inspired by Marshall’s ...
Kaique Matias de Andrade Roberto, Hugo Luiz Mariano   +1 more
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Algorithms in the theory of integral binary quadratic forms [PDF]

The classical ("old fashioned") theory of integral binary quadratic forms was developed by Gauss in his famous "Disquisitiones Arithmeticae". This thesis is concerned with the formal description and analysis of a selection of algorithms which make ...
Iliopoulos, C. S. (Costas S.)
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