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Dr Yemon Choi

Lecturer

  1. 2021
  2. Forthcoming

    Dual convolution for the affine group of the real line

    Choi, Y. & Ghandehari, M., 3/03/2021, (Accepted/In press) In: Complex Analysis and Operator Theory.

    Research output: Contribution to journalJournal articlepeer-review

  3. E-pub ahead of print

    Unavoidable subprojections in union-closed set systems of infinite breadth

    Choi, Y., Ghandehari, M. & Pham, H. L., 1/05/2021, In: European Journal of Combinatorics. 94, 17 p., 103311.

    Research output: Contribution to journalJournal articlepeer-review

  4. Published

    Stability of characters and filters for weighted semilattices

    Choi, Y., Ghandehari, M. & Pham, H. L., 11/02/2021, In: Semigroup Forum. 102, 1, p. 86-103 18 p.

    Research output: Contribution to journalJournal articlepeer-review

  5. 2020
  6. E-pub ahead of print

    A short proof that B(L_1) is not amenable

    Choi, Y., 6/11/2020, In: Proceedings of the Royal Society of Edinburgh: Section A Mathematics.

    Research output: Contribution to journalJournal articlepeer-review

  7. 2016
  8. Published

    A gap theorem for the ZL-amenability constant of a finite group

    Choi, Y., 12/2016, In: International Journal of Group Theory. 5, 4, p. 27-46 20 p.

    Research output: Contribution to journalJournal articlepeer-review

  9. Published

    Triviality of the generalized Lau product associated to a Banach algebra homomorphism

    Choi, Y., 10/2016, In: Bulletin of the Australian Mathematical Society. 94, p. 286-289 4 p.

    Research output: Contribution to journalJournal articlepeer-review

  10. Published

    Realization of compact spaces as cb-Helson sets

    Choi, Y., 02/2016, In: Annals of Functional Analysis. 7, 1, p. 158-169 12 p.

    Research output: Contribution to journalJournal articlepeer-review

  11. 2015
  12. Published

    Extension of derivations, and Connes-amenability of the enveloping dual Banach algebra

    Choi, Y., Samei, E. & Stokke, R., 14/12/2015, In: Mathematica Scandinavica. 117, 2, p. 258-303 46 p.

    Research output: Contribution to journalJournal articlepeer-review

  13. Published

    Directly finite algebras of pseudofunctions on locally compact groups

    Choi, Y., 09/2015, In: Glasgow Mathematical Journal. 57, 3, p. 693-707 15 p.

    Research output: Contribution to journalJournal articlepeer-review

  14. Published

    Weak amenability for Fourier algebras of 1-connected nilpotent Lie groups

    Choi, Y. & Ghandehari, M., 15/04/2015, In: Journal of Functional Analysis. 268, 8, p. 2440-2463 24 p.

    Research output: Contribution to journalJournal articlepeer-review

  15. 2014
  16. Published

    A nonseparable amenable operator algebra which is not isomorphic to a {$C^*$}-algebra

    Choi, Y., Farah, I. & Ozawa, N., 10/03/2014, In: Forum of Mathematics, Sigma. 2, 12 p., e2.

    Research output: Contribution to journalJournal articlepeer-review

  17. Published

    ZL-amenability and characters for the group algebras of restricted direct products of finite groups

    Alaghmandan, M., Choi, Y. & Samei, E., 1/03/2014, In: Journal of Mathematical Analysis and Applications. 411, 1, p. 314-328 15 p.

    Research output: Contribution to journalJournal articlepeer-review

  18. Published

    Singly generated operator algebras satisfying weakened versions of amenability

    Choi, Y., 2014, Algebraic methods in functional analysis: the Victor Shulman anniversary volume. Todorov, I. G. & Turowska, L. (eds.). Basel: Springer Verlag, p. 33-44 12 p. (Operator Theory: Advances and Applications; vol. 233).

    Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSNChapter

  19. Published

    ZL-amenability constants of finite groups with two character degrees

    Alaghmandan, M., Choi, Y. & Samei, E., 2014, In: Canadian Mathematical Bulletin. 57, p. 449-462 14 p.

    Research output: Contribution to journalJournal articlepeer-review

  20. 2013
  21. Published

    Approximately multiplicative maps from weighted semilattice algebras

    Choi, Y., 08/2013, In: Journal of the Australian Mathematical Society. 95, 1, p. 36-67 32 p.

    Research output: Contribution to journalJournal articlepeer-review

  22. Published

    On commutative, operator amenable subalgebras of finite von Neumann algebras

    Choi, Y., 05/2013, In: Journal für die reine und angewandte Mathematik (Crelle's Journal). 678, p. 201-222 22 p.

    Research output: Contribution to journalJournal articlepeer-review

  23. Published

    Quotients of Fourier algebras, and representations which are not completely bounded

    Choi, Y. & Samei, E., 20/03/2013, In: Proceedings of the American Mathematical Society. 141, 7, p. 2379-2388 10 p.

    Research output: Contribution to journalJournal articlepeer-review

  24. 2012
  25. Published

    Simplicial cohomology of band semigroup algebras

    Choi, Y., Gourdeau, F. & White, M. C., 08/2012, In: Proceedings of the Royal Society of Edinburgh: Section A Mathematics. 142, 4, p. 715-744 30 p.

    Research output: Contribution to journalJournal articlepeer-review

  26. 2011
  27. Published

    Characterizing derivations from the disk algebra to its dual

    Choi, Y. & Heath, M. J., 3/08/2011, In: Proceedings of the American Mathematical Society. 139, 3, p. 1073-1080 8 p.

    Research output: Contribution to journalJournal articlepeer-review

  28. Published

    Approximate amenability of Schatten classes, Lipschitz algebras and second duals of Fourier algebras

    Choi, Y. & Ghahramani, F., 2011, In: The Quarterly Journal of Mathematics. 62, 1, p. 39-58 20 p.

    Research output: Contribution to journalJournal articlepeer-review

  29. 2010
  30. Published

    Group representations with empty residual spectrum

    Choi, Y., 05/2010, In: Integral Equations and Operator Theory. 67, 1, p. 95-107 13 p.

    Research output: Contribution to journalJournal articlepeer-review

  31. Published

    Simplicial cohomology of augmentation ideals in $\ell^1(G)$

    Choi, Y., 02/2010, In: Proceedings of the Edinburgh Mathematical Society. 53, 1, p. 97-109 13 p.

    Research output: Contribution to journalJournal articlepeer-review

  32. Published

    Hochschild homology and cohomology of $\ell^1(\mathbb Z_+^k)$

    Choi, Y., 2010, In: The Quarterly Journal of Mathematics. 61, 1, p. 1-28 28 p.

    Research output: Contribution to journalJournal articlepeer-review

  33. Published

    Injective convolution operators on $\ell^infty(\Gamma)$ are surjective

    Choi, Y., 2010, In: Canadian Mathematical Bulletin. 53, 3, p. 447-452 6 p.

    Research output: Contribution to journalJournal articlepeer-review

  34. Published

    Simplicial homology of strong semilattices of Banach algebras

    Choi, Y., 2010, In: Houston Journal of Mathematics. 36, 1, p. 237-260 24 p.

    Research output: Contribution to journalJournal articlepeer-review

  35. Published

    Splitting maps and norm bounds for the cyclic cohomology of biflat Banach algebras

    Choi, Y., 2010, Banach Algebras 2009. Loy, R. J., Runde, V. & Sołtysiak, A. (eds.). Warsaw: Polish Academy of Sciences, p. 105-121 17 p. (Banach Center Publications; vol. 91).

    Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSNChapter

  36. Published

    Translation-finite sets and weakly compact derivations from $\ell^1(\mathbb Z_+)$ to its dual

    Choi, Y. & Heath, M. J., 2010, In: Bulletin of the London Mathematical Society. 42, 3, p. 429-440 12 p.

    Research output: Contribution to journalJournal articlepeer-review

  37. 2009
  38. Published

    Uniform bounds for point cohomology of $\ell^1(\mathbb Z_+)$ and related algebras

    Choi, Y., 15/10/2009, In: Journal of Mathematical Analysis and Applications. 358, 2, p. 249-260 12 p.

    Research output: Contribution to journalJournal articlepeer-review

  39. Published

    Approximate and pseudo-amenability of various classes of Banach algebras

    Choi, Y., Ghahramani, F. & Zhang, Y., 15/05/2009, In: Journal of Functional Analysis. 256, 10, p. 3158-3191 34 p.

    Research output: Contribution to journalJournal articlepeer-review

  40. 2007
  41. Published

    Biflatness of $\ell^1$-semilattice algebras

    Choi, Y., 10/2007, In: Semigroup Forum. 75, 2, p. 253-271 19 p.

    Research output: Contribution to journalJournal articlepeer-review

  42. 2006
  43. Published

    Simplicial homology and Hochschild cohomology of Banach semilattice algebras

    Choi, Y., 05/2006, In: Glasgow Mathematical Journal. 48, 2, p. 231-245 15 p.

    Research output: Contribution to journalJournal articlepeer-review

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