Question

Whether certain projections can have overlapping ranges yet not commute

score 100 · Answer 1 · 2026-03-28 01:12:50

100

Views

Whether certain projections can have overlapping ranges yet not commute

Published on 28 Mar 2026 - 1:12

score 82 · Answer 2 · 2017-02-28 08:21:38

82

Views

Embeddings for ultrapowers of the universal UHF-algebra

Published on 28 Feb 2017 - 8:21

score 66 · Answer 3 · 2026-03-26 04:29:38

66

Views

Identifying $C_{\lambda}^*(\Gamma)$ with $C(\hat{\Gamma})$ using Pontryagin Duality

Published on 26 Mar 2026 - 4:29

score 68 · Answer 4 · 2017-03-03 09:48:53

68

Views

$^*$-homomorphism $\pi_1 : M_2(A)\to B(K_1)$ is induced by $\pi : A\to B(K)$

Published on 03 Mar 2017 - 9:48

score 66 · Answer 5 · 2017-03-04 01:42:36

66

Views

Show that $\lambda^{\phi}: \Gamma \to \mathbb{B}(\cal{l}^2_{\phi}(\Gamma)$ is an unitary representation

Published on 04 Mar 2017 - 1:42

score 115 · Answer 6 · 2017-03-05 05:03:10

115

Views

Show that the GNS space of $C^*(\Gamma)$ with respect to $\phi$ is $l^2_{\phi}(\Gamma)$

Published on 05 Mar 2017 - 5:03

score 1k · Answer 7 · 2026-03-28 01:48:21

1k

Views

Why is a contractive algebra homomorphism between C-algebras necessarily a C-homomorphism?

Published on 28 Mar 2026 - 1:48

score 154 · Answer 8 · 2026-03-28 01:06:50

154

Views

CAR-algebra contains a unitary with full spectrum

Published on 28 Mar 2026 - 1:06

score 647 · Answer 9 · 2017-03-12 13:34:10

647

Views

Factor a simple linear differential operator

Published on 12 Mar 2017 - 13:34

score 1.1k · Answer 10 · 2017-03-12 19:12:33

1.1k

Views

If the polar decomposition of $T$ is $T = U|T|$, when is U self-adjoint?

Published on 12 Mar 2017 - 19:12

score 370 · Answer 11 · 2017-03-14 07:16:09

370

Views

Max norm of $\mathbb C$-linear extension of $\mathbb R$-linear map on Hermitian matrices

Published on 14 Mar 2017 - 7:16

score 318 · Answer 12 · 2026-03-28 01:07:20

318

Views

the unitary group of von Neumann algebra

Published on 28 Mar 2026 - 1:07

score 71 · Answer 13 · 2017-03-17 04:12:43

71

Views

Does $Q_i\rightarrow 0$ implies that $P\vee Q_i\rightarrow P$?

Published on 17 Mar 2017 - 4:12

score 49 · Answer 14 · 2026-03-28 01:13:00

49

Views

two different unitary groups generate the same von Neumann algebra

Published on 28 Mar 2026 - 1:13

score 41 · Answer 15 · 2017-03-20 01:38:12

41

Views

Given two nets of projections $\{P_i\}$ and $\{Q_i\}$. Both of them tend to $0$. Do we have $P_i\vee Q_i \rightarrow_i 0$?

Published on 20 Mar 2017 - 1:38

List Question

Whether certain projections can have overlapping ranges yet not commute

Embeddings for ultrapowers of the universal UHF-algebra

Identifying $C_{\lambda}^*(\Gamma)$ with $C(\hat{\Gamma})$ using Pontryagin Duality

$^*$-homomorphism $\pi_1 : M_2(A)\to B(K_1)$ is induced by $\pi : A\to B(K)$

Show that $\lambda^{\phi}: \Gamma \to \mathbb{B}(\cal{l}^2_{\phi}(\Gamma)$ is an unitary representation

Show that the GNS space of $C^*(\Gamma)$ with respect to $\phi$ is $l^2_{\phi}(\Gamma)$

Why is a contractive algebra homomorphism between C-algebras necessarily a C-homomorphism?

CAR-algebra contains a unitary with full spectrum

Factor a simple linear differential operator

If the polar decomposition of $T$ is $T = U|T|$, when is U self-adjoint?

Max norm of $\mathbb C$-linear extension of $\mathbb R$-linear map on Hermitian matrices

the unitary group of von Neumann algebra

Does $Q_i\rightarrow 0$ implies that $P\vee Q_i\rightarrow P$?

two different unitary groups generate the same von Neumann algebra

Given two nets of projections $\{P_i\}$ and $\{Q_i\}$. Both of them tend to $0$. Do we have $P_i\vee Q_i \rightarrow_i 0$?

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