Timeline for Abelian twisted reduced group C*-algebra
Current License: CC BY-SA 4.0
6 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Aug 28, 2021 at 14:07 | answer | added | Benjamin Steinberg | timeline score: 1 | |
| Aug 26, 2021 at 19:33 | comment | added | Jamie Gabe | I think $\sigma((m_1,m_2), (n_1, n_2)) = exp(2\pi i m_2 n_1 \theta)$ for $(m_1,m_2), (n_1,n_2) \in \mathbb Z^2$ defines the right 2-cocycle. | |
| Aug 26, 2021 at 19:12 | comment | added | Peg Leg Jonathan | @JamieGabe What is sigma here? | |
| Aug 26, 2021 at 0:32 | comment | added | Benjamin Steinberg | There is a twisted group ring of $Z/p\times Z/p$ isomorphic to $p\times p$ matrices over $\mathbb C$ | |
| Aug 25, 2021 at 9:27 | comment | added | Jamie Gabe | Can't you write the irrational rotation algebras $\mathcal A_\theta$ as $C^\ast_r(\mathbb Z^2, \sigma)$ for a twist $\sigma$? | |
| Aug 25, 2021 at 6:03 | history | asked | Peg Leg Jonathan | CC BY-SA 4.0 |