My research interests are in mathematical analysis, mainly in functional analysis and specifically in operator algebras.
My PhD advisor was Professor N. Christopher Phillips.
My research is on operator algebras on `L^p` spaces which "look like `C^{**}`-algebras". Roughly speaking, this consists of developing an analogous theory for such `L^p`-operator algebras that closely relates to the known theory for `C^{**}`-algebras. The interesting part lies in the fact that there is no concept of adjoint operator in a `L^p` -operator algebra and, therefore, the usual tools used to prove results in a `C^{**}`-algebra setting are not always available. This is a relatively new field of study, so not much is known about it. Some of the tools one needs when working on `L^p`-operator algebras are from the classic theory of `C^{**}`-algebras such as `K`-theory, representation theory and crossed products. However, methods from operator spaces and classical Banach space theory are also helpful here.
I am also interested in abstract harmonic analysis. In particular interaction between wavelets and `C^{**}`-algebras and the spectral synthesis problem for the `L^p` group operator algebra of the integers. The toolbox here inculdes topological groups, commutative Banach algebras, `K`-theory, Hilbert `C^{**}`-modules, and frames and bases.
A. Delfín, C. Farsi, J.Packer, "Twisted crossed products of Banach algebras",
Published in the Journal of Mathematical Analysis and Applications. Vol. 563, no. 1, Paper No. 130798, (2026).
MR5074376
(available at arXiv:2509.24106 [math.FA]).
A. Calin, I. Cartwright, L. Coffman, A. Delfín, C. Girard, J. Goldrick, A. Nerella, W. Wu “`C^{**}`-like modules and `p`-operator norms”, (REU-2024)
Published in the Annals of Functional Analysis. Vol. 17 (Paper 30), 17-30, (2026).
MR5043956
Zbl 8196708
(available at arXiv:2505.19471 [math.FA]).
A. Delfín, C. Farsi, J.Packer, "`L^{p}`-spectral triples and `p`-quantum compact metric spaces",
Published in the Journal of Fourier Analysis and Applications. Vol. 32 (Paper 10), 35pp, (2026).
MR5013387
Zbl 8164604
(available at arXiv:2411.13735 [math.FA]).
A. Delfín, "`L^{p}`-modules and `L^{p}`-correspondences",
Published in the Banach Journal of Mathematical Analysis. Vol. 20 (Paper 13), 25pp, (2025).
MR4991148
Zbl 8159410
(available at arXiv:2410.10789 [math.FA]).
A. Blinov, A. Delfín, E. Weld, "Multiplier Algebras of `L^{p}`-operator algebras",
Published in the Pacific Journal of Mathematics. Vol. 333, No. 2, 197-227, (2024).
MR4844670
Zbl 1561.46044
(available at arXiv:2403.16309 [math.FA]).
A. Delfín, "Representations of `C^{**}`-correspondences on pairs of Hilbert spaces",
Published in the Journal of Operator Theory. Vol. 92, No.1, 167-188, (2024).
MR4804331
Zbl 1568.46029
(available at arXiv:2208.14605 [math.OA]).