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100 177 (0,221s) •

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Basic Matrices.

We define a basic matrix as a square matrix which has both subdiagonal and superdiagonal rank at most one. We investigate, partly using additional restrictions, the relationship of basic matrices to factorizations....

BA - Obecná matematika

  • 2003
    • •
  • Jx
Result

Some Inheritance Properties for Complementary Basic Matrices

Complementary basic matrices which depend on a set of matrices of second order are studied. The results concentrate on the problem which properties of the second order matrices are preserved in the corresponding complementary basic ...

BA - Obecná matematika

  • 2010
    • •
  • Jx
Result

Two Results on Basic Oscillatory Matrices

tridiagonal matrix, is extended to the class of basic oscillatory matrices introduced recently. Then it is shown that every oscillatory matrix contains a basic oscillatory matrix as a factor. This explain...

BA - Obecná matematika

  • 2004
    • •
  • Jx
Result

Dense alternating sign matrices and extensions

In this paper, some connections of dense alternating sign matrices with total unimodularity, combined matrices, and generalized complementary basic matrices are explored....

BA - Obecná matematika

  • 2014
    • •
  • Jx
    • •
  • Link
Result

A Note on Strongly Dense Matrices

In this note, strongly dense matrices are defined and some basic properties of these matrices are obtained. In particular, it is shown that for nonnegative and Boolean matrices, the product of conformable strongly dense matrices is strongly ...

BA - Obecná matematika

  • 2015
    • •
  • Jx
    • •
  • Link
Result

Combinatorial aspects of generalized complementary basic matrices

This paper extends some properties of the generalized complementary basic matrices, in particular, in a combinatorial direction. These include inheritance (such as for Alternating Sign Matrices), spectral, and sign pattern matrix (i...

BA - Obecná matematika

  • 2013
    • •
  • Jx
    • •
  • Link
Result

Categorical explanatory variables in the linear model

Basic themes of document: indicator variables; design matrix; contrast matrix...

BB - Aplikovaná statistika, operační výzkum

  • 2009
    • •
  • Jx
Result

The Weighed matrix Permutation Problem

Basic themes of document: matrix; column; permutation; weight...

AP - Městské, oblastní a dopravní plánování

  • 2007
    • •
  • D
Result

The Weighed matrix Permutation Problem

Basic themes of document: matrix; column; permutation; weight...

AP - Městské, oblastní a dopravní plánování

  • 2007
    • •
  • D
Result

Portfolio analysis.

Basic themes in document: B.C.G. Matrix; marketing.

AH - Ekonomie

  • 2002
    • •
  • Jx
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