Workshop


Regularity Theory for Free Boundary and Geometric Variational Problems II


Pisa, 10-15 July 2022


Support


This workshop was organized in the framework of the project
ERC VaReg (European Union - Horizon 2020)
the local expenses of the participants were covered entirely by this project.


Description


     This workshop is dedicated to the recent advances in the theories of

Free Boundary Problems and Minimal Surfaces

which include problems and combine tools from different fields as for instance PDEs, Calculus of Variations and Geometric Analysis.

The main topic is the regularity and the fine structure of geometric objects (free boundaries, minimal surfaces, free interfaces) obtained trough the minimization of variational functionals. The description of the local structure of these minima is a common objective for both the fields of Free Boundary Problems and Minimal Surfaces and the techniques developed in this context have found application to problems from different areas.

The workshop brings together young researchers and leading experts in these fields, the focus being on the recent important breakthroughs in the regularity of the free boundaries and minimal surfaces, in particular, on the formation and the structure of singularities. 


Participants

Giulia Bevilacqua (Politecnico di Torino)

Guy David (Université de Paris Sud)

Guido De Philippis (Courant Institute)

Antonio De Rosa (University of Maryland)

Nick Edelen (Notre Dame University)

Xavier Fernández-Real (EPFL - Lausanne)

Matteo Focardi (Università di Firenze)

Federico Franceschini (ETH Zürich)

Carlo Gasparetto (SISSA Trieste)

Jonas Hirsch (Universität Leipzig)

Francesco Maggi (University of Texas)

Andrea Marchese (Università di Trento)

Dario Mazzoleni (Università di Pavia)

Paul Minter (Cambridge)

Mickael Nahon (Université de Savoie)

Roberto Ognibene (Università di Pisa)

Davide Parise (Cambridge)

Alessandra Pluda (Università di Pisa)

Felix Schulze (University of Warwick)

Henrik Shahgholian (KTH Stockholm)

Leon Simon (Stanford University)

Yannick Sire (Johns Hopkins University)

Anna Skorobogatova (Princeton University)

Mariana Smit Vega Garcia (Western Washington University)

Nicola Soave (Politecnico di Milano)

Luca Spolaor (University of California San Diego)

Simone Steinbrüchel (Universität Leipzig)

Salvatore Stuvard (Università di Milano)

Riccardo Tione (MPI Leipzig)

Giorgio Tortone (Università di Pisa)

Bozhidar Velichkov (Università di Pisa)

Stefano Vita (Università di Torino)

Hui Yu (National University of Singapore)

Schedule

Monday 11 July
(Aula Magna - Polo Fibonacci)

09:00-09:50   Leon Simon

Construction of singular minimal hypersurfaces

10:10-11:00   Francesco Maggi

A mesoscale flatness criterion and its application to exterior isoperimetry

11:40-12:30   Guido De Philippis

Non-degenerate minimal surfaces as energy concentration sets: a variational approach

15:00-15:50   Anna Skorobogatova

Higher codimension area-minimizers: understanding interior branch points via the frequency function

16:10-17:00   Carlo Gasparetto

Regularity for the mean curvature flow with boundary

Tuesday 12 July
(Aula Magna - Dipartimento di Matematica)

09:00-09:50   Henrik Shahgholian

A free boundary perspective on transmission and inverse scattering problems

10:10-11:00   Guy David

Regularity (quantitative convexity) of the boundary for subsets of a convex domain that almost minimize the perimeter

11:40-12:30   Hui Yu

Contact points with integer and 7/2 frequencies in the thin obstacle problem

15:00-15:50   Simone Steinbrüchel

Generic uniqueness for optimal transportation networks

16:10-17:00   Federico Franceschini

Free boundary partial regularity in the thin obstacle problem

Wednesday 13 July
(Aula Magna - Dipartimento di Matematica)

09:00-09:50   Felix Schulze

Initial stability estimates for Ricci flow and three dimensional Ricci-pinched manifolds

10:10-11:00   Alessandra Pluda

Network flow: resolution of singularities and stability

11:40-12:30   Salvatore Stuvard

Area minimizing hypersurfaces modulo p: regularity and structure of singular sets

Thursday 14 July
(Aula Magna - Dipartimento di Matematica)

09:00-09:50   Nick Edelen

A strong maximum principle for minimizers of the one-phase Bernoulli problem

10:10-11:00   Riccardo Tione

The multi-bubble problems for convex sets

11:40-12:30   Jonas Hirsch

On the De Giorgi-Nash-Moser theorem for hypoelliptic operators

15:00-15:50   Mickaël Nahon

Free discontinuity problems in Stokes fluids

16:10-17:00   Paul Minter

Branched regularity theorems for stable codimension one stationary integral varifolds near higher multiplicity cones

Friday 15 July
(Aula Magna - Polo Fibonacci)

09:00-09:50   Xavier Fernández-Real

Optimal regularity for the fully nonlinear thin obstacle problem

10:10-11:00   Antonio De Rosa

Min-max construction of anisotropic CMC surfaces

11:40-12:30   Mariana Smit Vega Garcia

Branch points for (almost-)minimizers of two-phase free boundary problems


Abstracts


Book of abstracts


Scientific organizers: Luca Spolaor and Bozhidar Velichkov

Organizers: Luca Spolaor (UCSD), Francesca Menconi and Bozhidar Velichkov (University of Pisa)

Contacts: bozhidar.velichkov[at]unipi.it, lspolaor[at]ucsd.edu, francesca.menconi[at]unipi.it