The workshop “Semigroups, Evolution Equations and Positivity” on the occasion of Rainer Nagel’s 85th birthday will be held at the University of Siena in December 3-5, 2025.
The Italian-German collaboration in the field of functional analysis—with a particular focus on evolution equations, operator semigroups, and positivity—was initiated by Edoardo Vesentini and Giuseppe Da Prato in Pisa, and by Helmut H. Schaefer and Rainer Nagel in Tübingen. The aim of this workshop is to celebrate this long-standing partnership, tracing its development from classical results to recent advances and open problems.
The workshop seeks to enhance the understanding of semigroup theory among young researchers, providing both educational and networking opportunities.
Speakers
- Luciana Angiuli (University of Salento, Italy)
- Wolfgang Arendt (University of Ulm, Germany)
- András Bátkai (PH Vorarlberg University, Austria)
- Noa Bihlmaier (University of Tübingen, Germany)
- Ingrid Carbone (University of Calabria, Italy)
- Petra Csomos (Eötvös Loránd University of Budapest, Hungary)
- Graziano Gentili (University of Florence, Italy)
- Jochen Glück (University of Wuppertal, Germany)
- Günther Greiner (FAU Erlangen, Germany)
- Markus Haase (University of Kiel, Germany)
- Matthias Hieber (TU Darmstadt, Germany)
- Asgar Jamneshan (University of Bonn, Germany)
- Henrik Kreidler (University of Wuppertal, Germany)
- Dávid Kunszenti-Kovács (HUN-REN Alfréd Rényi Institute of Mathematics, Hungary)
- Luca Lorenzi (University of Parma, Italy)
- Lahcen Maniar (Cadi Ayyad University, Morocco)
- José Mazon (University of Valencia, Spain)
- Giorgio Metafune (University of Salento, Italy)
- Jan van Neerven (TU Delft, The Netherlands)
- Gregor Nickel (University of Siegen, Germany)
- Diego Pallara (University of Salento, Italy)
- Agnes Radl (Fulda University of Applied Sciences, Germany)
- Silvia Romanelli (University of Bari, Italy)
- Nick Ruoff (University of Tübingen, Germany)
- Phillip Schmale (University of Tübingen, Germany)
- Roland Schnaubelt (Karlsruhe Institute of Technology, Germany)
- Eszter Sikolya (Eötvös Loránd University of Budapest, Hungary)
- Vincenzo Vespri (University of Florence, Italy)
- Markus Wacker (HTW Dresden, Germany)
- Michael Zimmermann (University of Tübingen, Germany)
On the afternoon of December 4, the pianist, mathematician, and science communicator Ingrid Carbone will give a conversation-concert in the former chapel of San Niccolò, Via Roma 56, Siena.
Venue
The conference will take place at Room 101 – Department of Information Engineering and Mathematics – University of Siena (See on Google Maps)
How to reach Siena
From Florence Aeroport:
1) Take tramvia T2 (https://www.firenzetramvia.it) – San Marco direction – to Santa Maria Novella Station (Alamanni Stop), then take bus 131 or 131R from Florence Autostation (see https://www.at-bus.it/it/linee-e-orari/regionali-131 or https://www.at-bus.it/it/linee-e-orari/regionali-131r)
2) Take tramvia T2 – San Marco direction – to Santa Maria Novella Station (Valfonda Stop or Alamanni Stop), then take the regional train (Florence-Siena) from Santa Maria Novella Station.
For the train’s timetable see https://www.trenitalia.com/it.html
Pay attention: not all trains are direct for Siena, sometimes you have to change!
3) Take tramvia T2 – San Marco direction – to Santa Maria Novella Station (Alamanni Stop), then take T1- Villa Costanza direction – from Alamanni Stop to Villa Costanza (last stop of T1). Finally, take a direct bus Flixibus (https://www.flixbus.it) for Siena.
The frequency of T2 and T1 is about every 5 minutes.
From Pisa Aeroport:
1) Take PISAMOVER from the Airport (https://pisa-mover.com/servizio-shuttle/) to CentralRailway Station and take a train to Siena. In this case, you likely have to connect in Empoli oryou can go to Florence and take the bus for Siena.
2) Take a direct bus Flixibus from Pisa Aeroport to Siena (https://www.flixbus.it)
From Rome Fiumicino:
1) Take a direct bus Tiemme SPA (https://www.tiemmespa.it) – in general stallo 8, T3 – from Rome Fiumicino to Siena
2) Take a direct bus Flixibus – T3 – from Rome Fiumicino to Siena.
Organisers
- Britta Dorn (Tübingen)
- Klaus Engel (L’Aquila)
- Genni Fragnelli (Siena)
- Marjeta Kramar Fijavž (Ljubljana)
- Delio Mugnolo (Hagen)
- Abdelaziz Rhandi, Vincenzo Leone (Salerno)
Contact: genni.fragnelli@unisi.it, vleone@unisa.it
Partial Differential Equations @DipMat 