Kotkowski, Bogdan; Waszak, Aleksander A contribution to the theory of calculus of matrices. (English) Zbl 0735.15002 Fasc. Math. 19, 135-141 (1989). Reviewer: P.M.Gibson (Huntsville) MSC: 15A09 15A24 × Cite Format Result Cite Review PDF
Szulc, Tomasz Sufficient conditions for the nonsingularity of an interval matrix. (English) Zbl 0726.65024 Fasc. Math. 19, 233-237 (1989). Reviewer: H.Ratschek (Düsseldorf) MSC: 65F05 65G30 15A09 × Cite Format Result Cite Review PDF