- #1
naima
Gold Member
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I am reading the proof of the Choi's theorem in his own paper.
he first introduces ##E_{ij} ## as the nn null matrix but with a 1 at i,j.
Then he uses ##(E_{ij})_{1<=i,j <=n}##
he says that thi is a positive matrix. What is talking about?
Is it a matrix of matrices?
he first introduces ##E_{ij} ## as the nn null matrix but with a 1 at i,j.
Then he uses ##(E_{ij})_{1<=i,j <=n}##
he says that thi is a positive matrix. What is talking about?
Is it a matrix of matrices?
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