More on the Normality of the Unbounded Product of Two Normal Operators

2012/02/28 by Mohammed Hichem Mortad, Mortad, Mohammed Hichem, Khaldia Madani +1
Computer Science · Mathematics · #47A05 (Primary) 47B25 (Secondary) #Advanced Topics in Algebra #FOS: Mathematics #Functional Analysis (math.FA) #Holomorphic and Operator Theory #Matrix Theory and Algorithms #Operator Algebras (math.OA) #math.FA #math.OA #msc:47A05 #msc:47B25

paper · pdf · doi:10.48550/arxiv.1202.6142

This paper has been withdrawn for a critical technical reason

openalex publication_date 2012/02/28 · arxiv created 2012/05/25 · arxiv updated 2012/05/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Let A and B be two -non necessarily bounded- normal operators. We give new conditions making their product normal. We also generalize a result by Deutsch et al on normal products of matrices.

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