Brief Communications

Convexity and weak closedness of the image of operator balls under linear-fractional transformations

T. Ya. Azizov, V. K. Kiriakidi

Voronezh State University

UDC: 517.9

Received: 15.09.1999

DOI: 10.4213/mzm839

 English version: Mathematical Notes, 2000, 67:2, 245–247

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