@article{Adm2017Invar-35782,
  year={2017},
  doi={10.1016/j.laa.2016.11.001},
  title={Invariance of total nonnegativity of a matrix under entry-wise perturbation and subdirect sum of totally nonnegative matrices},
  volume={514},
  issn={0024-3795},
  journal={Linear Algebra and its Applications},
  pages={222--233},
  author={Adm, Mohammad and Garloff, Jürgen}
}

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    <dcterms:abstract xml:lang="eng">A real matrix is called totally nonnegative if all its minors are nonnnegative. In this paper the minors are determined from which the maximum allowable entry perturbation of a totally nonnegative matrix can be found, such that the perturbed matrix remains totally nonnegative. Also, the total nonnegativity of the first and seond subdirect sum of two totally nonnegative matrices is considered.</dcterms:abstract>
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    <dc:contributor>Garloff, Jürgen</dc:contributor>
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    <dcterms:issued>2017</dcterms:issued>
    <dc:contributor>Adm, Mohammad</dc:contributor>
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