Department of Mathematics and Systems Analysis


Research reports by Zhijian Yuan

Here are the reports authored by Zhijian Yuan. See the reports of all authors.

Helsinki University of Technology Institute of Mathematics Research Reports A

Jarmo Malinen, Olavi Nevanlinna, Zhijian Yuan
On a tauberian condition for bounded linear operators   [pdf][ps] abstract: [pdf][ps]
Received 2004-05-18 * Power bounded, Ritt resolvent condition, tauberian theorem * AMS 47A10, 40E05, 47A30, 47D03 * 10 pages
Jarmo Malinen, Olavi Nevanlinna, Ville Turunen, Zhijian Yuan
A lower bound for the differences of powers of linear operators   [pdf][ps] abstract: [pdf][ps]
Received 2004-03-18 / Revised 2004-05-18 * Berkani's conjecture, quasi-nilpotent linear operator, differences of powers, decay * AMS 47A30, 47D03, 47A10, 30C45 * 10 pages

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