Items where Author is "Choi, Yemon"

Journal Article

Choi, Yemon and Ghandehari, Mahya and Pham, Hung Le (2025) Constructing non-AMNM weighted convolution algebras for every semilattice of infinite breadth. Journal of Functional Analysis, 288 (3): 110735. ISSN 0022-1236

Choi, Yemon and Gardella, Eusebio and Thiel, Hannes (2024) Rigidity results for L p -operator algebras and applications. Advances in Mathematics, 452: 109747. ISSN 0001-8708

Choi, Yemon and Gardella, Eusebio and Thiel, Hannes (2024) Rigidity results for L^p-operator algebras and applications. Advances in Mathematics. ISSN 0001-8708 (In Press)

Choi, Yemon (2023) An explicit minorant for the amenability constant of the Fourier algebra. International Mathematics Research Notices, 2023 (22). 19390–19430. ISSN 1073-7928

Choi, Yemon and Horvath, Bence and Laustsen, Niels (2022) Approximately multiplicative maps between algebras of bounded operators on Banach spaces. Transactions of the American Mathematical Society, 375 (10). pp. 7121-7147. ISSN 0002-9947

Choi, Yemon (2021) A short proof that B(L_1) is not amenable. Proceedings of the Royal Society of Edinburgh: Section A Mathematics, 151 (6). pp. 1758-1767. ISSN 0308-2105

Choi, Yemon (2021) Constructing alternating 2-cocycles on Fourier algebras. Advances in Mathematics, 385: 107747. ISSN 0001-8708

Choi, Yemon and Ghandehari, Mahya (2021) Dual convolution for the affine group of the real line. Complex Analysis and Operator Theory, 15 (4): 76. ISSN 1661-8262

Choi, Yemon and Ghandehari, Mahya and Pham, Hung Le (2021) Unavoidable subprojections in union-closed set systems of infinite breadth. European Journal of Combinatorics, 94: 103311. ISSN 0195-6698

Choi, Yemon and Ghandehari, Mahya and Pham, Hung Le (2021) Stability of characters and filters for weighted semilattices. Semigroup Forum, 102 (1). pp. 86-103. ISSN 0037-1912

Choi, Yemon (2016) A gap theorem for the ZL-amenability constant of a finite group. International Journal of Group Theory, 5 (4). pp. 27-46. ISSN 2251-7650

Choi, Yemon (2016) Triviality of the generalized Lau product associated to a Banach algebra homomorphism. Bulletin of the Australian Mathematical Society, 94. pp. 286-289. ISSN 0004-9727

Choi, Yemon (2016) Realization of compact spaces as cb-Helson sets. Annals of Functional Analysis, 7 (1). pp. 158-169. ISSN 2008-8752

Choi, Yemon and Samei, Ebrahim and Stokke, Ross (2015) Extension of derivations, and Connes-amenability of the enveloping dual Banach algebra. Mathematica Scandinavica, 117 (2). pp. 258-303. ISSN 0025-5521

Choi, Yemon (2015) Directly finite algebras of pseudofunctions on locally compact groups. Glasgow Mathematical Journal, 57 (3). pp. 693-707. ISSN 0017-0895

Choi, Yemon and Ghandehari, Mahya (2015) Weak amenability for Fourier algebras of 1-connected nilpotent Lie groups. Journal of Functional Analysis, 268 (8). pp. 2440-2463. ISSN 0022-1236

Choi, Yemon and Ghandehari, Mahya (2014) Weak and cyclic amenability for Fourier algebras of connected Lie groups. Journal of Functional Analysis, 266 (11). pp. 6501-6530. ISSN 0022-1236

Choi, Yemon and Ghandehari, Mahya (2014) Weak and cyclic amenability for Fourier algebras of connected Lie groups. Journal of Functional Analysis, 266 (11). pp. 6501-6530. ISSN 0022-1236

Choi, Yemon and Farah, Ilijas and Ozawa, Narutaka (2014) A nonseparable amenable operator algebra which is not isomorphic to a {$C^*$}-algebra. Forum of Mathematics, Sigma, 2: e2. ISSN 2050-5094

Alaghmandan, Mahmood and Choi, Yemon and Samei, Ebrahim (2014) ZL-amenability and characters for the group algebras of restricted direct products of finite groups. Journal of Mathematical Analysis and Applications, 411 (1). pp. 314-328. ISSN 0022-247X

Alaghmandan, Mahmood and Choi, Yemon and Samei, Ebrahim (2014) ZL-amenability constants of finite groups with two character degrees. Canadian Mathematical Bulletin, 57. pp. 449-462. ISSN 0008-4395

Choi, Yemon (2013) Approximately multiplicative maps from weighted semilattice algebras. Journal of the Australian Mathematical Society, 95 (1). pp. 36-67. ISSN 1446-7887

Choi, Yemon (2013) On commutative, operator amenable subalgebras of finite von Neumann algebras. Journal für die reine und angewandte Mathematik (Crelle's Journal), 678. pp. 201-222. ISSN 0075-4102

Choi, Yemon and Samei, Ebrahim (2013) Quotients of Fourier algebras, and representations which are not completely bounded. Proceedings of the American Mathematical Society, 141 (7). pp. 2379-2388. ISSN 0002-9939

Choi, Yemon and Gourdeau, Frédéric and White, Michael C. (2012) Simplicial cohomology of band semigroup algebras. Proceedings of the Royal Society of Edinburgh: Section A Mathematics, 142 (4). pp. 715-744. ISSN 1473-7124

Choi, Yemon and Heath, Matthew J. (2011) Characterizing derivations from the disk algebra to its dual. Proceedings of the American Mathematical Society, 139 (3). pp. 1073-1080. ISSN 0002-9939

Choi, Yemon and Ghahramani, Fereidoun (2011) Approximate amenability of Schatten classes, Lipschitz algebras and second duals of Fourier algebras. The Quarterly Journal of Mathematics, 62 (1). pp. 39-58. ISSN 0033-5606

Choi, Yemon (2010) Group representations with empty residual spectrum. Integral Equations and Operator Theory, 67 (1). pp. 95-107. ISSN 1420-8989

Choi, Yemon (2010) Simplicial cohomology of augmentation ideals in $\ell^1(G)$. Proceedings of the Edinburgh Mathematical Society, 53 (1). pp. 97-109. ISSN 0013-0915

Choi, Yemon (2010) Hochschild homology and cohomology of $\ell^1(\mathbb Z_+^k)$. The Quarterly Journal of Mathematics, 61 (1). pp. 1-28. ISSN 0033-5606

Choi, Yemon (2010) Injective convolution operators on $\ell^infty(\Gamma)$ are surjective. Canadian Mathematical Bulletin, 53 (3). pp. 447-452. ISSN 0008-4395

Choi, Yemon (2010) Simplicial homology of strong semilattices of Banach algebras. Houston Journal of Mathematics, 36 (1). pp. 237-260.

Choi, Yemon and Heath, Matthew J. (2010) Translation-finite sets and weakly compact derivations from $\ell^1(\mathbb Z_+)$ to its dual. Bulletin of the London Mathematical Society, 42 (3). pp. 429-440. ISSN 0024-6093

Choi, Yemon (2009) Uniform bounds for point cohomology of $\ell^1(\mathbb Z_+)$ and related algebras. Journal of Mathematical Analysis and Applications, 358 (2). pp. 249-260. ISSN 0022-247X

Choi, Yemon and Ghahramani, Fereidoun and Zhang, Yong (2009) Approximate and pseudo-amenability of various classes of Banach algebras. Journal of Functional Analysis, 256 (10). pp. 3158-3191. ISSN 0022-1236

Choi, Yemon (2007) Biflatness of $\ell^1$-semilattice algebras. Semigroup Forum, 75 (2). pp. 253-271. ISSN 1432-2137

Choi, Yemon (2006) Simplicial homology and Hochschild cohomology of Banach semilattice algebras. Glasgow Mathematical Journal, 48 (2). pp. 231-245. ISSN 0017-0895

Contribution in Book/Report/Proceedings

Choi, Yemon (2014) Singly generated operator algebras satisfying weakened versions of amenability. In: Algebraic methods in functional analysis : the Victor Shulman anniversary volume. Operator Theory: Advances and Applications . Springer Verlag, Basel, pp. 33-44. ISBN 9783034805018

Choi, Yemon (2010) Splitting maps and norm bounds for the cyclic cohomology of biflat Banach algebras. In: Banach Algebras 2009 :. Banach Center Publications . Polish Academy of Sciences, Warsaw, pp. 105-121. ISBN 9788386806102

Thesis

Celorrio Ramirez, M.Eugenia and Dales, G. and Choi, Yemon (2023) Arens Regularity of Banach Function Algebras and Decomposable Blaschke Products whose Degree is a Power of 2. PhD thesis, Lancaster University.

Horvath, Bence and Laustsen, Niels and Choi, Yemon (2019) Algebras of operators on Banach spaces, and homomorphisms thereof. PhD thesis, Lancaster University.

Menez, Christopher and Choi, Yemon (2018) A category theoretic approach to extensions of Banach algebras. PhD thesis, Lancaster University.