Dates: December 14–17, 2026 Venue: University of Jyväskylä Main Building C (Päärakennus), Seminaarinkatu 15, Jyväskylä FI – 40014
The University of Jyväskylä is located in a beautiful natural landscape, just outside the centre of Jyväskylä. The university campus areas Seminaarinmäki, Mattilanniemi and Ylistö form a unique park-like complex that combines old and new.
To navigate the university’s campus, use navi.jyu.fi.
Important Dates
Registration, abstract submission and payments will open in June, 2026.
11:00 Plenary I: Tatiana Bubba (University of Ferrara)
12:00 Lunch break
13:30 Parallel sessions
15:10 Coffee
15:45 Parallel sessions
17:30 Icebreaker
19:00 FIPS Board Meeting & Young researchers’ event
Tuesday, December 16th
08:50 Parallel sessions
10:30 Coffee
11:00 Plenary II: Nicholas Nelsen (Cornell University)
12:00 Lunch break
13:30 Parallel sessions & AI session
15:10 Coffee & Women in Inverse Problems
16:00 Lightning talks
17:40 FIPS annual meeting
19:00 Conference dinner at Restaurant Bank (Unioninkatu 20)
Wednesday, December 17th
08:50 Parallel sessions
10:30 Coffee
11:00 Parallel sessions
12:15 Lunch break
13:30 Finnish Inverse Prize
13:45 Industry session
13:45 Alexander Meaney / Opening Words
13:50 – 14:10 Tuomo Kauranne / Arbonaut: Machine Learning as an Inverse Problem?
14:10 – 14:30 Antti Solonen / Danfoss: Mathematics of district heating: bridging producers and consumers
14:30 – 14:50 Çağlar Aytekin / Quanscient: MultiphysicsAI: Fast Surrogate Models for Large-Scale Inverse Problems
14:50 – 15:10 Lauri Parkkonen / Megin: Magnetoencephalography and the electromagnetic inverse problem in brain measurements
15:10 – 15:30 Mikko Lilja / Planmed: CBCT as an imaging method and its practical applications
15:30 Coffee
16:00 Parallel sessions
17:15 Closing
Monday, December 15th
Tatiana Bubba (University of Ferrara)
Tatiana Bubba is an Assistant Professor in Numerical Analysis at the Department of Mathematics and Computer Science of the University of Ferrara (Italy). After obtaining her PhD in 2016 from the University of Ferrara, Italy, she became postdoctoral researcher at the University of Helsinki, Finland, where she was Academy Postdoc from 2020. In 2021 she relocated to the UK, first with a Royal Society Newton International Fellowship at the University of Cambridge, and later on as a Lecturer at the University of Bath from 2022 before returning to the University of Ferrara in 2024. Her interest lies in computational inverse problems, especially in tomographic applications. Currently, her research revolves around combining sparse regularisation techniques based on multiresolution systems, with deep learning approaches.
Tuesday, December 16th
Nicholas Nelsen (Cornell University)
Nicholas Nelsen is a Klarman Fellow in the Department of Mathematics at Cornell University. In the fall of 2026, he will join The University of Texas at Austin as an Assistant Professor. Nelsen’s research centers on computational mathematics, machine learning, inverse problems, and uncertainty quantification. His fundamental work is motivated by applications in the physical, engineering, and data sciences. From 2024 to 2025, he was an NSF Postdoctoral Research Fellow in the Department of Mathematics at MIT. Nelsen earned his Ph.D. from Caltech in 2024, where his doctoral dissertation on operator learning was awarded the W. P. Carey & Co. Prize in Applied Mathematics and the Centennial Prize for the Best Thesis in MCE. His work was recognized with a SIGEST award from the Society for Industrial and Applied Mathematics in 2024.
The city of Jyväskylä is located in Central Finland, some 270 km north of Helsinki. The connections are relatively frequent and the journey from Helsinki to Jyväskylä takes 3,5 – 4 hours by train. Please note that trains and buses are more convenient and environmentally friendly ways to reach Jyväskylä than plane.
From Helsinki to Jyväskylä
There are frequent buses and trains, both from Helsinki airport and Helsinki Central Station to Jyväskylä.
The journey from Helsinki to Jyväskylä takes approximately 3.5—4 hours. Please check the train connections and purchase tickets on the VR (Finnish Railways) website.
To travel by bus, you can check timetables and purchase tickets on the websites of Matkahuolto, Onnibus or Flixbus.
Flixbus, Onnibus and Matkahuolto buses leave from the Helsinki Vantaa Airport, and also from Helsinki city centre.
Travel within Jyväskylä
Jyväskylä region comprises of three sub-regions designated A, B and C. The purchase of bus tickets depends on the zone you wish to travel within. The university, city center and the hotels mentioned below are all located within zone A.
Linkki -buses provide local transport. Tickets can be paid for in cash to the driver or by contactless payment (Visa, Visa Electron, Master Card, Eurocard, or Google Pay/Apple Pay). You can download the Linkki application from the app store to your mobile device to find tickets and routes easily in the Jyväskylä region.
Accomodation
Inverse Days participants can get a discounted daily rate at the following hotels.
Töölö Towers: use the promotion code “Inverse25” while booking from Unihome’s website.
Room rate: 73€ per night for single room and 103€ per night for double room for any night from 12.12. to 19.12.
Room rate: 5% discount on the best available daily rate for nights 15.12. to 17.12.
All room bookings are based on availability and may close when all available rooms are booked, so please book ahead of time.
All room rates include breakfast.
Other hotel options near the venue include:
Hotel Alba
Time Hotel
Hotel Milton
Solo Sokos Hotel Paviljonki
Original Sokos Hotel Alexandra
Hotel Versa
Boutique Hotel Yöpuu
Scandic Jyväskylä Station
Green Star Hotel
Forenom Hotel
Omena Hotel
(all dates by midnight EET)
Young researchers’ event (December 15th)
The private event takes place at Viihdeklubi gr8 on Monday 15th of December from 19:00 to 21:00. The address is Salmisaaren liikuntakeskus (1st floor), Energiakatu 3, 00180 Helsinki.
With public transport, it takes approximately 25 to 30 minutes to travel from the University of Helsinki’s main building to the venue. Trips can be planned through the HSL website or with the HSL app. To find a route from the main building to the venue, for example, set Fabianinkatu 33 as the point of origin and Energiakatu 3 as the destination. An AB ticket is needed to travel from the City Centre to the venue.
Dinner is not included. Drinks and small snacks are available at the venue at attendee’s own expense.
During the event, attendees are free to take part in any of the available activities. The activities include bowling, darts, pool tables, archery, reaction and speed test games, table games, shooting simulator, etc. To take part in archery, please take extra care to follow instructions from the venue staff. We have nearly 150 registered attendees, so popular activities might be crowded at times.
We ask all participants at Inverse Days to adhere to the Finnish Inverse Problems Society Code of Conduct. You can download the code of conduct document from the link below.
