Quadratic equation

Known as: Quadratic model, ABC, The Quadratic Equation 
In elementary algebra, a quadratic equation (from the Latin quadratus for "square") is any equation having the form where x represents an unknown… (More)
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Papers overview

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Highly Cited
2018
Highly Cited
2018
This paper presents a new algorithm, termed <italic>truncated amplitude flow</italic> (TAF), to recover an unknown vector <inline… (More)
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Highly Cited
2014
Highly Cited
2014
This note shows that we can recover any complex vector x0 ∈ C exactly from on the order of n quadratic equations of the form |〈ai… (More)
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Highly Cited
2013
Highly Cited
2013
In this paper we consider a system of quadratic equations |〈zj ,x〉|2 = bj , j = 1, ...,m, where x ∈ R is unknown while normal… (More)
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Highly Cited
2006
Highly Cited
2006
  • M. Mirzavaziri, M. S. Moslehian
  • 2006
Using the fixed point alternative theorem we establish the orthogonal stability of quadratic functional equation of Pexider type… (More)
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Highly Cited
2002
Highly Cited
2002
UOBYQA is a new algorithm for general unconstrained optimization calculations, that takes account of the curvature of the… (More)
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2002
2002
The security of several recent digital signature schemes is based on the difficulty of solving large systems of quadratic… (More)
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Highly Cited
1999
Highly Cited
1999
This article theoretically explores the characteristics underpinning quadratic term structure models (QTSMs), which designate the… (More)
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Highly Cited
1998
Highly Cited
1998
The object of this paper (which consists of two parts) is to describe irreducible varieties over free groups and to characterize… (More)
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Highly Cited
1997
Highly Cited
1997
 We present a new, “elementary” quantifier elimination method for various special cases of the general quantifier elimination… (More)
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Highly Cited
1991
Highly Cited
1991
We show that the problem of minimizing a concave quadratic function with one concave direction is NP-hard. This result can be… (More)
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