Abstract
Abstract: We characterize bistochastic Kadison–Schwarz operators acting on M2(C). The obtained characterization allows us to find positive operators that are not Kadison–Schwarz ones. Moreover, we provide several examples of Kadison–Schwarz operators which are not completely positive.
Original language | English |
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Pages (from-to) | 165-177 |
Number of pages | 13 |
Journal | Proceedings of the Steklov Institute of Mathematics |
Volume | 313 |
Issue number | 1 |
DOIs | |
Publication status | Published - Jul 2021 |
Keywords
- Kadison–Schwarz operator
- bistochastic mapping
- complete positivity
ASJC Scopus subject areas
- Mathematics (miscellaneous)