2 papers
math.OA2025
Polar Decomposition for Non-Adjointable Maps
Michael Skeide
We give conditions when not necessarily adjointable operators between Hilbert modules allow for a polar decomposition involving not necessarily adjointable partial isometries. Whil…
math.OA2023
Partial Isometries Between Hilbert Modules and Their Compositions
Michael Skeide
Motivated by questions raised in the preprint [AL20] by Accardi and Lu (private communication), we examine criteria for when the product of two partial isometries between Hilbert s…