@article{Adm2014Impro-29987,
  year={2014},
  doi={10.13001/1081-3810.1920},
  title={Improved tests and characterizations of totally nonnegative matrices},
  url={http://repository.uwyo.edu/ela/vol27/iss1/255/},
  volume={27},
  issn={1081-3810},
  journal={Electronic Journal of Linear Algebra (ELA)},
  pages={588--610},
  author={Adm, Mohammad and Garloff, Jürgen},
  note={Article Number: 255}
}

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    <dcterms:abstract xml:lang="eng">Totally nonnegative matrices, i.e., matrices having all minors nonnegative, are considered. A condensed form of the Cauchon algorithm which has been proposed for finding a parameterization of the set of these matrices with a fixed pattern of nonvanishing minors is derived. The close connection of this variant to Neville elimination and bidiagonalization is shown and new determinantal tests for total nonnegativity are developed which require much fever minors to be tested than for the tests known so far. New characterizations of some subclasses of the totally nonnegative matrices as well as shorter proofs for some classes of matrices for being (nonsingular and) totally nonnegative are derived.</dcterms:abstract>
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