Geodesic
Unitary symbols and factorization hyperbolic matrices
Zapiski Nauchnykh Seminarov POMI, Problems in the theory of representations of algebras and groups. Part 33, Tome 470 (2018), pp. 111-119 Cet article a éte moissonné depuis la source Math-Net.Ru

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In this paper we introduce and study unitary symbols, and as application we obtain a factorization of hyperbolic matrices. 
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     author = {V. I. Kopeiko},
     title = {Unitary symbols and factorization hyperbolic matrices},
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     url = {http://geodesic.mathdoc.fr/item/ZNSL_2018_470_a6/}
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V. I. Kopeiko. Unitary symbols and factorization hyperbolic matrices. Zapiski Nauchnykh Seminarov POMI, Problems in the theory of representations of algebras and groups. Part 33, Tome 470 (2018), pp. 111-119. http://geodesic.mathdoc.fr/item/ZNSL_2018_470_a6/

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[2] H. Bass, “Unitary algebraic $K$-theory”, Lecture Notes Math., 343, 1973, 57–265 | DOI | MR | Zbl

[3] V. I. Kopeiko, “Nilpotentnaya po Bassu unitarnaya $K_1$-gruppa unitarnogo koltsa”, Zap. nauchn. semin. POMI, 460, 2017, 134–157 | MR

[4] Kh. Bass, Dzh. Milnor, Zh.-P. Serr, “Reshenie kongruentsproblemy dlya $\mathrm{SL}_n$ ($n\geq3$) i $\mathrm{Sp}_{2n}$ ($n\geq2$)”, Matematika, Sb. per., 15, 1971, 44–60 | Zbl

[5] Kh. Bass, Algebraicheskaya $K$-teoriya, Mir, M., 1973 | Zbl