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Singular matrices that are products of two idempotents or products of two nilpotents
release_sq5iyi5lubcf3n6zpiq2346m5a
by
Grigore Călugăreanu
Abstract
<jats:title>Abstract</jats:title>
Over commutative domains we characterize the singular 2 × 2 matrices which are products of two idempotents or products of two nilpotents. The relevant casees are the matrices with zero second row and the singular matrices with only nonzero entries.
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