Geodesic
On NSP constants of a matrix and their linear preservers
Algebra and discrete mathematics, Tome 28 (2019) no. 2, pp. 278-290.

Voir la notice de l'article provenant de la source Math-Net.Ru

We collect some basic properties of NSP constants of a matrix, discuss an additive behavior of the spark, and prove two theorems characterizing linear endomorphisms which preserve the NSP constants.
Keywords: Null Space Property, spark of a matrix, linear preserver of a function. 
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Marcin Skrzyński. On NSP constants of a matrix and their linear preservers. Algebra and discrete mathematics, Tome 28 (2019) no. 2, pp. 278-290. http://geodesic.mathdoc.fr/item/ADM_2019_28_2_a10/

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