2015
DOI: 10.1090/tran/6308
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Weak multiplier bialgebras

Abstract: A non-unital generalization of weak bialgebra is proposed with a multiplier-valued comultiplication. Certain canonical subalgebras of the multiplier algebra (named the 'base algebras') are shown to carry coseparable co-Frobenius coalgebra structures. Appropriate modules over a weak multiplier bialgebra are shown to constitute a monoidal category via the (co)module tensor product over the base (co)algebra. The relation to Van Daele and Wang's (regular and arbitrary) weak multiplier Hopf algebra is discussed. Da… Show more

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Cited by 23 publications
(190 citation statements)
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“…Moreover the notion of a measured multiplier Hopf algebroid (a regular multiplier Hopf algebroid with a faithful integral), as it is defined in Definition 2.2.1 in [19], involves some unexpected conditions (see e.g. condition (4) in that definition). Finally, remark that the duality of regular weak multiplier Hopf algebras as obtained in Section 5.1 of [19] is more involved than it looks at a first glance.…”
Section: The Place Of These Results In the Theorymentioning
confidence: 99%
See 1 more Smart Citation
“…Moreover the notion of a measured multiplier Hopf algebroid (a regular multiplier Hopf algebroid with a faithful integral), as it is defined in Definition 2.2.1 in [19], involves some unexpected conditions (see e.g. condition (4) in that definition). Finally, remark that the duality of regular weak multiplier Hopf algebras as obtained in Section 5.1 of [19] is more involved than it looks at a first glance.…”
Section: The Place Of These Results In the Theorymentioning
confidence: 99%
“…It was entitled The Larson Sweedler theorem for weak multiplier Hopf algebras. This work was inspired by the work of Böhm et al [4] on weak multiplier bialgebras that was available already in 2014. The Larson Sweedler paper appeared in 2018 (see [7]).…”
Section: Integral Theory and Dualitymentioning
confidence: 99%
“…Finally, assume that B χ B is an invertible character as in (4). Then the maps Θ λ := ρ( B χ B ) and Θ ρ := λ( B χ B ) are bijections of A because B χ B is invertible in the convolution algebra, and they are automorphisms because B χ B is a character.…”
Section: Modificationmentioning
confidence: 99%
“…The latter were introduced by Van Daele and the author in [18] and simultaneously generalize the regular weak multiplier Hopf algebras studied by Van Daele and Wang [24,19] and Böhm [4], and Hopf algebroids studied by [5,11,25], see also [2].…”
Section: Introductionmentioning
confidence: 96%
“…Condition (C) says that the multiplication m for the multiplier bimonoid (t 1 , t 2 ) is related to the multiplication m for the multiplier bimonoid (t 3 , t 4 ) via the equation m = mb; this condition is self-dual. Thus (1) is equivalent to (2), and (3) is equivalent to (4). In applying the C-C duality, one must also replace m by m = mb −1 .…”
Section: Definition 38mentioning
confidence: 99%