Unit Squares Intersecting All Secants of a Square.
Pavel Valtr (1994)
Discrete & computational geometry
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Displaying similar documents to “Vectorization of bitmaps based on the LSQ method”
Unit Squares Intersecting All Secants of a Square.
Nested squares and evaluations of integer products.
Dilcher, Karl (2000)
Experimental Mathematics
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Powers of commutators as products of squares.
Akhavan-Malayeri, M. (2002)
International Journal of Mathematics and Mathematical Sciences
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Powers of a product of commutators as products of squares.
Abdollahi, Alireza (2004)
International Journal of Mathematics and Mathematical Sciences
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On the computer algebra implementation of the least squares method on the nonnegative orthant.
Ikramov, Kh.D., Matin Far, M. (2004)
Zapiski Nauchnykh Seminarov POMI
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On squares of squares II
Andrew Bremner (2001)
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On the Reconstruction of Latin Squares
Ratko Tošić (1980)
Publications de l'Institut Mathématique
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Visual Magic Squares and Group Orbits I
John Pais, Richard Singer (2004)
Visual Mathematics
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On the sum of two squares and two powers of k
Roger Clement Crocker (2008)
Colloquium Mathematicae
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It can be shown that the positive integers representable as the sum of two squares and one power of k (k any fixed integer ≥ 2) have positive density, from which it follows that those integers representable as the sum of two squares and (at most) two powers of k also have positive density. The purpose of this paper is to show that there is an infinity of positive integers not representable as the sum of two squares and two (or fewer) powers of k, k again any fixed integer ≥ 2. ...
On squares of differentiable functions
M. Kuczma (1969)
Annales Polonici Mathematici
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Kriging and masurement errors
István Fazekas, Alexander G. Kukush (2005)
Discussiones Mathematicae Probability and Statistics
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A linear geostatistical model is considered. Properties of a universal kriging are studied when the locations of observations aremeasured with errors. Alternative prediction procedures are introduced and their least squares errors are analyzed.
On melancholic magic squares
Götz Trenkler, Dietrich Trenkler (2013)
Discussiones Mathematicae Probability and Statistics
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Starting with Dürer's magic square which appears in the well-known copper plate engraving Melencolia we consider the class of melancholic magic squares. Each member of this class exhibits the same 86 patterns of Dürer's magic square and is magic again. Special attention is paid to the eigenstructure of melancholic magic squares, their group inverse and their Moore-Penrose inverse. It is seen how the patterns of the original Dürer square to a large extent are passed down also to the inverses...