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Amalgamated Products of Strongly RFD $\mathrm{C}^*$-algebras arising from locally compact groups Courtney, Kristin
Description
Residual finite dimensionality is the
$\mathrm{C}^*$-algebraic analogue for maximal almost periodicity and residual
finiteness for groups. Just as with the analogous group-theoretic
properties, there is significant interest in when residual finite
dimensionality is preserved under standard constructions, in particular
amalgamated free products. In general, this question is quite difficult;
however the answer is known when the amalgam is finite dimensional or when
the two $\mathrm{C}^*$-algebras are commutative. In moving beyond these cases, group
theoretic restrictions suggest that we consider central amalgams. We
generalize the commutative case to pairs of so-called ``strongly
residually finite dimensional" $\mathrm{C}^*$-algebras amalgamated over a central
subalgebra. Examples of strongly residually finite dimensional
$\mathrm{C}^*$-algebras include group $\mathrm{C}^*$-algebras associated to virtually abelian
groups, certain just-infinite groups, and Lie groups with only finite
dimensional irreducible unitary representations. Though this property may seem restrictive, a
recent result of Thom indicates that it is in fact necessary.
This is joint work with Tatiana Shulman.
Item Metadata
| Title |
Amalgamated Products of Strongly RFD $\mathrm{C}^*$-algebras arising from locally compact groups
|
| Creator | |
| Publisher |
Banff International Research Station for Mathematical Innovation and Discovery
|
| Date Issued |
2019-10-04T11:06
|
| Description |
Residual finite dimensionality is the
$\mathrm{C}^*$-algebraic analogue for maximal almost periodicity and residual
finiteness for groups. Just as with the analogous group-theoretic
properties, there is significant interest in when residual finite
dimensionality is preserved under standard constructions, in particular
amalgamated free products. In general, this question is quite difficult;
however the answer is known when the amalgam is finite dimensional or when
the two $\mathrm{C}^*$-algebras are commutative. In moving beyond these cases, group
theoretic restrictions suggest that we consider central amalgams. We
generalize the commutative case to pairs of so-called ``strongly
residually finite dimensional" $\mathrm{C}^*$-algebras amalgamated over a central
subalgebra. Examples of strongly residually finite dimensional
$\mathrm{C}^*$-algebras include group $\mathrm{C}^*$-algebras associated to virtually abelian
groups, certain just-infinite groups, and Lie groups with only finite
dimensional irreducible unitary representations. Though this property may seem restrictive, a
recent result of Thom indicates that it is in fact necessary.
This is joint work with Tatiana Shulman.
|
| Extent |
30.0 minutes
|
| Subject | |
| Type | |
| File Format |
video/mp4
|
| Language |
eng
|
| Notes |
Author affiliation: WWU Münster
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| Series | |
| Date Available |
2020-04-02
|
| Provider |
Vancouver : University of British Columbia Library
|
| Rights |
Attribution-NonCommercial-NoDerivatives 4.0 International
|
| DOI |
10.14288/1.0389719
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| URI | |
| Affiliation | |
| Peer Review Status |
Unreviewed
|
| Scholarly Level |
Postdoctoral
|
| Rights URI | |
| Aggregated Source Repository |
DSpace
|
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Item Citations and Data
Rights
Attribution-NonCommercial-NoDerivatives 4.0 International