Product of two positive contractions
classification
🧮 math.RA
math.FAmath.OC
keywords
positiveproductprojectionscharacterizationsgivenmatrixwrittenalternating
read the original abstract
Several characterizations are given for a square matrix that can be written as the product of two positive (semidefinite) projections. Based on one of these characterizations, and the theory of alternating projections, a Matlab program is written to check the condition and construct the two positive projections whose product equal to the given matrix, if they exist.
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