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Free dynamical quantum groups and the dynamical quantum group S U Q d y n ( 2 )

Thomas Timmermann (2012)

Banach Center Publications

We introduce dynamical analogues of the free orthogonal and free unitary quantum groups, which are no longer Hopf algebras but Hopf algebroids or quantum groupoids. These objects are constructed on the purely algebraic level and on the level of universal C*-algebras. As an example, we recover the dynamical S U q ( 2 ) studied by Koelink and Rosengren, and construct a refinement that includes several interesting limit cases.

Free powers of the free Poisson measure

Melanie Hinz, Wojciech Młotkowski (2011)

Colloquium Mathematicae

We compute moments of the measures ( ϖ p ) t , where ϖ denotes the free Poisson law, and ⊞ and ⊠ are the additive and multiplicative free convolutions. These moments are expressed in terms of the Fuss-Narayana numbers.

Freeness with amalgamation, limit theorems and S-transform in non-commutative probability spaces of type B

Mihai Popa (2010)

Colloquium Mathematicae

The paper addresses several problems left open by P. Biane, F. Goodman and A. Nica [Trans. Amer. Math. Soc. 355 (2003)]. The main result is that a type B non-commutative probability space can be studied in the framework of freeness with amalgamation. This view allows easy ways of constructing a version of the S-transform as well as proving analogues to the Central Limit Theorem and Poisson Limit Theorem.

From double Lie groups to quantum groups

Piotr Stachura (2005)

Fundamenta Mathematicae

It is shown, using geometric methods, that there is a C*-algebraic quantum group related to any double Lie group (also known as a matched pair of Lie groups or a bicrossproduct Lie group). An algebra underlying this quantum group is the algebra of a differential groupoid naturally associated with the double Lie group.

Generalized inverses in C*-algebras II

Robin Harte, Mostafa Mbekhta (1993)

Studia Mathematica

Commutativity and continuity conditions for the Moore-Penrose inverse and the "conorm" are established in a C*-algebra; moreover, spectral permanence and B*-properties for the conorm are proved.

Generalized non-commutative tori

Chun-Gil Park (2002)

Studia Mathematica

The generalized non-commutative torus T ϱ k of rank n is defined by the crossed product A m / k × α × α . . . × α , where the actions α i of ℤ on the fibre M k ( ) of a rational rotation algebra A m / k are trivial, and C * ( k × k ) × α × α . . . × α is a non-commutative torus A ϱ . It is shown that T ϱ k is strongly Morita equivalent to A ϱ , and that T ϱ k M p is isomorphic to A ϱ M k ( ) M p if and only if the set of prime factors of k is a subset of the set of prime factors of p.

Generalized q-deformed Gaussian random variables

Marek Bożejko, Hiroaki Yoshida (2006)

Banach Center Publications

We produce generalized q-Gaussian random variables which have two parameters of deformation. One of them is, of course, q as for the usual q-deformation. We also investigate the corresponding Wick formulas, which will be described by some joint statistics on pair partitions.

Currently displaying 501 – 520 of 1491