Geodesic
How to characterize $(T+H)$-matrices and $(T+H)$-circulants
Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki, Tome 55 (2015) no. 2, pp. 185-188 
Kh. D. Ikramov; V. N. Chugunov. How to characterize $(T+H)$-matrices and $(T+H)$-circulants. Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki, Tome 55 (2015) no. 2, pp. 185-188. http://geodesic.mathdoc.fr/item/ZVMMF_2015_55_2_a1/
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Voir la notice de l'article provenant de la source Math-Net.Ru

Let $A$ be a given $n\times$ matrix. How to find out whether $A$ is a $(T+H)$-matrix? If the answer is positive, then, perhaps, $A$ is even a $(T+H)$-circulant? How then the circulant components of its $(T+H)$-decomposition can be found? Algorithmic answers are given to all these questions.

[1] Ikramov Kh. D., Chugunov V. N., Abdikalykov A. K., “O lokalnykh usloviyakh, kharakterizuyuschikh mnozhestvo $(T+H)$-matrits”, Dokl. AN, 457:1 (2014), 17–18 | DOI

[2] Bozzo E., “Algebras of higher dimension for displacement decompositions and computations with Toeplitz plus Hankel matrices”, Linear Algebra Appl., 230 (1995), 127–150 | DOI

[3] Ikramov Kh. D., Saveleva N. V., “O nekotorykh kvazidiagonalizuemykh semeistvakh matrits”, Zh. vychisl. matem. i matem. fiz., 38:7 (1998), 1075–1084