Geodesic
Automorphisms of the semigroup of nonnegative invertible matrices of order $2$ over rings
Fundamentalʹnaâ i prikladnaâ matematika, Tome 16 (2010) no. 7, pp. 49-60 
E. I. Bunina; L. V. Tupikina. Automorphisms of the semigroup of nonnegative invertible matrices of order $2$ over rings. Fundamentalʹnaâ i prikladnaâ matematika, Tome 16 (2010) no. 7, pp. 49-60. http://geodesic.mathdoc.fr/item/FPM_2010_16_7_a2/
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     title = {Automorphisms of the semigroup of nonnegative invertible matrices of order~$2$ over rings},
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     url = {http://geodesic.mathdoc.fr/item/FPM_2010_16_7_a2/}
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Voir la notice de l'article provenant de la source Math-Net.Ru

In this paper, we describe automorphisms of the semigroup $\mathrm G_2(R)$ of nonnegative invertible matrices if $R$ is a (not necessarily commutative) partially ordered ring without zero divisors with $1/n$ for some natural number $n>1$.

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