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math.RA2016★ 1 cited
New examples of extremal positive linear maps
Anita Buckley, Klemen Šivic
New families of nonnegative biquadratic forms that have 8, 9 or 10 real zeros in are constructed. These are the first examples with 8, 9 or 10 rea…
math.FA2016★ 12 cited
There are many more positive maps than completely positive maps
Igor Klep, Scott McCullough, Klemen Šivic +1
A linear map between matrix spaces is positive if it maps positive semidefinite matrices to positive semidefinite ones, and is called completely positive if all its ampliations are…