This article is cited in 1 paper

On P.A. Shirokov's Curve and Theorems of Hausdorff and Dines

M. Yu. Kokurin

Mari State University, Ioshkar-Ola

Abstract: We discuss relations between geometric results obtained by P. A. Shirokov in 1930-s and classical theorems of F. Hausdorff and L. Dines.

Keywords: quadratic form, numerical range, boundary curve.

UDC: 512.647.2

Received: 14.05.2009