The Kalton years 2010-2025
A workshop in homage to Nigel Kalton
A workshop in homage to Nigel Kalton
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Nigel Kalton was an extraordinary mathematician and an important, influential source of inspiration for the Banext group at Extremadura -- not to mention how much those of us lucky enough to have met Nigel miss him. In May 2026, it will be twenty years since the fabulous Banach Spaces and their Applications in Analysis conference in honor of Nigel's 60th birthday, held at Miami University, Oxford, Ohio; and eleven since its follow-up at the CIRM in Luminy. Following that tradition, we are organizing this workshop focused on Banach space theory and related areas.
The workshop will be structured into four panels.
Panel 1. About Nigel's life and work.
Speakers: F. Albiac, J.M.F. Castillo, B. Randrianantoanina.
Panel 2. These ones Nigel didn't see coming.
Plenary lectures on results obtained after his passing that would probably have surprised him -- though this is hard to claim given his sharp mathematical intuition.
Speakers: J.L. Ansorena, F. Cabello Sánchez, G. Lancien, G. Plebanek, N. de Rancourt, P. Scholze, P. Tradacete.
Panel 3. Advances on selected topics.
Invited talks about new advances in topics dear to Nigel.
Speakers: F. Baudier, B.M. Braga, W.H.G. Correa, W. Cuellar, A. Fovelle, R. Pino.
Panel 4. Communications from participants.
The Workshop will take place at the Instituto de Matemáticas de la Universidad de Extremadura, Badajoz, Spain, from Tuesday, May 19 until Friday, May 22, 2026. If you wish to participate please fill out the Registration form HERE and do not hesitate to contact the Organizing Committee or email kaltonyears@gmail.com for any assistance.
Organizing Committee:
Félix Cabello Sánchez, fcabello@unex.es
Javier Cabello Sánchez, coco@unex.es
Jesús M. F. Castillo, castillo@unex.es
Ricardo García, rgarcia@unex.es
Raúl Martínez Bohórquez, raulmb@unex.es
Daniel Morales González, danmorg@unex.es
Yolanda Moreno Salguero, ymoreno@unex.es
José Navarro Garmendia, navarrogarmendia@unex.es
Scientific Committee:
Fernando Albiac, fernando.albiac@unavarra.es
Jesús M. F. Castillo, castillo@unex.es
Gilles Godefroy, godefroy@imj-prg.fr
Beata Randrianantoanina, randrib@miamioh.edu
Local Staff:
Álvaro Iglesias Cambero
Pedro Martín Jiménez
Emmanuel Moreno Mejía
Jorge Rovira Pérez
Marina Polo Rodríguez
Pablo Torrado López
Topics and beyond, mathematics and friendship with Nigel Kalton
Lipschitz free spaces in the Kalton zone
The Kalton program
(Online conference)On homeomorphisms between the spheres of ℓ∞k and ℓ2k
(Online conference)
Iterated extensions of Banach spaces
Painted from memory
Twisted Hilbert spaces not isomorphic to their duals
Two steps into the homology of ℓ2
About algebras of operators on Z2
The asymptotic Enflo problem
Nonlinear embeddings and asymptotic geometry of Banach spaces
Rochberg spaces as generalized Z2
Twisted sums with c0 and the CCKY problem
Ergodicity of the Kalton-Peck space
Nonlinear type and metric embeddings of lamplighter metric spaces
Liquid functional analysis
(Online conference)Progress in Banach lattices
Follow the workshop online
Microsoft Teams
Join via TeamsBook of Abstracts
Download Book of Abstracts (PDF)Welcome
Topics and beyond, mathematics and friendship with Nigel Kalton
Twisted sums with c0 and the CCKY problem
Rochberg spaces as generalized Z2
Twisted Hilbert spaces not isomorphic to their duals
Iterated extensions of Banach spaces
Nonlinear type and metric embeddings of lamplighter metric spaces
Ergodicity of the Kalton-Peck space
Liquid functional analysis
About algebras of operators on Z2
The Kalton program
The property M of Kalton, type functions and their applications to fixed point theory
Von Neumann-Maharam problem for vector lattices
Non-commutative Lp-spaces associated with real von Neumann algebras (with Shukhrat M. Usmanov, UPJ)
Generic operators
Painted from memory
Two steps into the homology of ℓ2
The asymptotic Enflo problem
Nonlinear embeddings and asymptotic geometry of Banach spaces
On homeomorphisms between the spheres of ℓ∞k and ℓ2k
Uniform homeomorphisms and interpolation of families of Banach spaces
Wickstead's conjecture on positive projections and non-representable Banach lattice algebras
Lipschitz free spaces in the Kalton zone
Transfinite Daugavet property
Progress in Banach lattices
The registration period for this workshop has now closed (deadline: April 30th, 2026).
If you have any questions, please feel free to contact the organizing committee at kaltonyears@gmail.com.
Registration is opened until April 30th.
Registration is free for invited speakers and for members of the Department of Mathematics at the University of Extremadura.
For other members, there is a registration fee of 200 €. This fee covers lunches, coffee breaks, a tour around Badajoz and the official dinner of Thursday.
There are three available methods to complete your registration payment:
To receive a formal invoice, you must request it within 15 days of payment. Please specify whether the invoice should be issued to an institution (University, Institute, Company, etc.) or to the individual participant. In both cases, a proof of payment is required. Please send your request to kaltonyears@gmail.com with the following details:
· Tax Name: (Full name of the individual or the Institution).
· Tax ID: (NIF, CIF, or VAT Number).
· Full Billing Address: (Including city, postal code, and country).
Ayuda a Grupos GR24056 y Proyecto de investigación IB24002
Proyecto PID2023-146505NB-C21 financiado por MCIU/AEI/10.13039/5011000110331 y por el FEDER/UE.
We suggest the following hotels:
Badajoz is a historic city on the banks of the Guadiana river, at the border between Spain and Portugal. Extremadura, its region, is home to two UNESCO World Heritage Sites: the walled old city of Cáceres (90 km) and Mérida (60 km), the best-preserved Roman city in Spain and the ancient capital of Lusitania.
