W. Majewski

activity

19982007

most citedOn positive decomposable maps

5 citations · 20 across the 8 of their papers we have counts for

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3 papers · 1 filter

math.FA2007★ 1 cited

On the structure of positive maps between matrix algebras

Wladyslaw A. Majewski, Marcin Marciniak

A partial description of the structure of positive unital maps $ϕ: M_2(\bC) \to M_{n+1}(\bC)$ ( $n \geq 2$ ) is given.

math.FA2005

Decomposability of extremal positive unital maps on $M_{2}$

Wladyslaw A. Majewski, Marcin Marciniak

A map $ϕ:M_m(\bC)\to M_n(\bC)$ is decomposable if it is of the form $ϕ = ϕ_{1} + ϕ_{2}$ where $ϕ_{1}$ is a CP map while $ϕ_{2}$ is a co-CP map. It is known that if $m = n = 2$ then every positive…

math.FA2005

On decomposability of positive maps between $M_{2}$ and $M_{n}$

Wladyslaw A. Majewski, Marcin Marciniak

A map $ϕ:M_m(\bC)\to M_n(\bC)$ is decomposable if it is of the form $ϕ = ϕ_{1} + ϕ_{2}$ where $ϕ_{1}$ is a CP map while $ϕ_{2}$ is a co-CP map. A partial characterization of decomposability fo…

On the structure of positive maps between matrix algebras

Decomposability of extremal positive unital maps on M2​

On decomposability of positive maps between M2​ and Mn​

Decomposability of extremal positive unital maps on $M_{2}$

On decomposability of positive maps between $M_{2}$ and $M_{n}$