# Search results for: Marek Ptak

Colloquium Mathematicum > 2016 > 142 > 1 > 83-97

Czechoslovak Mathematical Journal > 2013 > 63 > 2 > 421-434

Linear Algebra and Its Applications > 2012 > 437 > 2 > 623-629

Integral Equations and Operator Theory > 2011 > 71 > 1 > 1-12

*A*

_{ i+1}contains a copy of

*A*

_{ i }. The formal definition is reminiscent of the classical ordering on projections in a von Neumann algebra. It is shown that if the powers of

*A*are simultaneously consistent, then

*A*must be reflexive. This is applied to study reflexivity of power partial...

Banach Center Publications > 2007 > 75 > 1 > 249-259

Journal of Functional Analysis > 2005 > 218 > 2 > 395-408

Banach Center Publications > 2005 > 67 > 1 > 241-244

Annales Polonici Mathematici > 2005 > 86 > 2 > 97-105

Journal of Functional Analysis > 1998 > 156 > 2 > 411-428

Rozprawy Matematyczne

Annales Polonici Mathematici > 1995 > 62 > 2 > 97-110

Annales Polonici Mathematici > 1991 > 54 > 1 > 21-28