Geodesic
$q$-deformed circularity for an unbounded operator in Hilbert space
Schôichi Ôta1
1 Department of Content and Creative Design Kyushu University 4-9-1 Shiobaru, Fukuoka 815-8540, Japan
Colloquium Mathematicum, Tome 120 (2010) no. 2, pp. 191-199

Voir la notice de l'article provenant de la source Institute of Mathematics Polish Academy of Sciences

The notion of strong circularity for an unbounded operator is introduced and studied. Moreover, $q$-deformed circularity as a $q$-analogue of circularity is characterized in terms of the partially isometric and the positive parts of the polar decomposition.
DOI : 10.4064/cm120-2-2
Keywords: notion strong circularity unbounded operator introduced studied moreover q deformed circularity q analogue circularity characterized terms partially isometric positive parts polar decomposition

Schôichi Ôta 1

1 Department of Content and Creative Design Kyushu University 4-9-1 Shiobaru, Fukuoka 815-8540, Japan 
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Schôichi Ôta. $q$-deformed circularity for an unbounded
 operator in Hilbert space. Colloquium Mathematicum, Tome 120 (2010) no. 2, pp. 191-199. doi: 10.4064/cm120-2-2

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