Kyushu University

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20022008

most citedA giant outburst two years before the core-collapse of a massive star

428 citations

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6 papers · 1 filter

math.OA2008★ 2 cited

Toeplitz-composition C*-algebras for certain finite Blaschke products

Hiroyasu Hamada, Yasuo Watatani

Let R be a finite Blaschke product of degree at least two with R(0)=0. Then there exists a relation between the associated composition operator C_R on the Hardy space and the C*-al…

math.OA2008

Classification of minimal actions of a compact Kac algebra with amenable dual on injective factors of type III

Toshihiko Masuda, Reiji Tomatsu

We classify a certain class of minimal actions of a compact Kac algebra with amenable dual on injective factors of type III. Our main technical tools are the structural analysis of…

math.OA2008★ 1 cited

Approximate innerness and central triviality of endomorphisms

Toshihiko Masuda, Reiji Tomatsu

We introduce the notions of approximate innerness and central triviality for endomorphisms on separable von Neumann factors, and we characterize them for hyperfinite factors by Con…

math.OA2008

Quasi-orthogonal subalgebras of matrix algebras

Hiromichi Ohno

We investigate pairwise quasi-orthogonal subalgebras in $M_{p^{k n}}$ which are isomorphic to $M_{p^{k}}$ for $k \geq 1$ , $n \geq 2$ and a prime number $p$ with $p \geq 3$ . We prove th…

math.OA2008★ 1 cited

$C^{*}$ -algebras arising from substitutions

Masaru Fujino

In this paper, we introduce a $C^{*}$ -algebra associated with a proper primitive substitution. We show that the $C^{*}$ -algebra is simple and purely infinite and contains the…

math.OA2007

Indecomposable representations of quivers on infinite-dimensional Hilbert spaces

Masatoshi Enomoto, Yasuo Watatani

We study indecomposable representations of quivers on separable infinite-dimensional Hilbert spaces by bounded operators. We consider a complement of Gabriel's theorem for these re…