TENORS Workshop 1

TENORS Workshop 1 is designed to train the theoretical topics of TENORS programme, and to present the research activity of the network and the work of the Doctoral Candidates (DCs). Meeting with the DCs, their mentors and advisors will be organized on this occasion, to monitor the progress of the individual research projects. The academic partners and external experts will also offer courses and tutorial presentations on the scientific topics of TENORS. The DCs will have the opportunity to present their research to general audience and to receive constructive feedback on their research progress and presentation technique.

Organizers

The TENORS Workshop 1 will be organized by University of Konstanz.

The scientific coordinator of TENORS project is Bernard Mourrain – Inria Université Côte d’Azur

The admin contacts of the workshop are:

Linh Nguyen – Inria Université Côte d’Azur (linh.nguyen@inria.fr)
Lea Nothacker – University of Konstanz (lea.2.nothacker@uni-konstanz.de)

Dates and Venue

The TENORS Workshop 1 will be organized from 22 to 26 September 2025 at University of Konstanz

Address: Universitätsstraße 10, 78464 Konstanz, Germany

Registration

Registrations are now open HERE until 05 September 2025

Poster submission should be sent to Linh Nguyen (linh.nguyen@inria.fr) by 10 September 2025

Agenda

Monday 22 September 2025

Meeting room: A701

Time	Talk	Speakers
13:30 – 14:00	Welcome coffee & Registration at K503	All participants
14:00 – 15:00	Border apolarity – Part 1	Jaroslaw Buczynski – Mathematics of Polish Academy of Sciences
15:00 – 15:30	Short break and open discussion
15:30 – 16:30	Separation theorems and spectra for ordered semirings with applications to tensors	Tobias Fritz – University of Innsbruck, Austria
16:30 – 17:30	Asymptotic tensor rank is characterized by polynomials	Matthias Christandl – University of Copenhagen

Tuesday 23 September 2025

Meeting room: A600

Time	Talk	Speakers
09:00 – 10:00	Border apolarity – Part 2	Jaroslaw Buczynski – Mathematics of Polish Academy of Sciences
10:00 – 10:30	Short break and open discussion
10:30 – 11:30	From matroids to tensors via Chow quotients – (Part 1)	Mateusz Michalek – University of Konstanz
11:30 – 12:00	Hermitian distance degree of Unitary invariant matrix varieties	Nikhil Ken (DC11) – University of Florence
12:00 – 14:00	Lunch
14:00 – 15:00	An efficient uniqueness theorem for overcomplete tensor decomposition	Pascal Koiran – Ecole Normale Supérieure de Lyon
15:00 – 15:30	Generalized Schubert varieties	Matej Dolezalek (DC4) – University of Konstanz
15:30 – 16:00	Rational invariants of even degree polynomials under the orthogonal group	Henri Breloer (DC7) – UiT
16:00 – 16:30	Short break and open discussion
16:30 – 17:00	Low-rank Semidefinite Programming for Symmetric Tensor Decomposition: An Experimental Study	Yassine Koubaa (DC15) – Artelys
17:00 – 17:30	TENORS DC Talk “The Moment/SOS Hierarchy: (When) Will It Ever End?“	Sami Halaseh (DC3) – LAAS/CNRS

Wednesday 24 September 2025

Meeting room: A702

Time	Talk	Speakers
09:00 – 10:00	Tensor methods for nonconvex optimization	Coralia Cartis – University of Oxford
10:00 – 10:30	Short break and open discussion
10:30 – 11:30	From matroids to tensors via Chow quotients – (Part 2)	Mateusz Michalek – University of Konstanz
11:30 – 12:30	#P-Hardness of Immanants on Restricted Matrices	Cordian Riener – UiT
12:00 – 14:00	Lunch
14:00 – 15:00	Recent advances in tensor decomposition and identifiability	Alexander Taveira Blomenhofer – University of Copenhagen
15:00 – 15:30	Computing Erdős-Turán constants via semidefinite programming	Luca Wellmeier (DC8) -UiT
15:30 – 17:00	POSTER SESSION
19:30	Social Dinner	Kastaniengarten on Insel Mainau The participants of the dinner can visit the island free of charge 2 hours before the start of the event.

Thursday 25 September 2025

Meeting room: A600

Time	Talk	Speakers
09:00 – 10:00	Infinite-dimensional Christoffel-Darboux polynomial kernels	Didier Henrion – LAAS
10:00 – 10:30	Short break and open discussion
10:30 – 11:30	A Method for Establishing Asymptotically Accurate Bounds for Extreme Roots of Eulerian Polynomials Using Polynomial Stability Preservers	Alejandro González Nevado – University of Konstanz
11:30 – 12:00	Semidefinite hierarchies for separable diagonal unitary invariant quantum states	Jonas Britz (DC12) – CWI
12:00 – 14:00	Lunch
14:00 – 15:00	Algebraic Varieties in Second Quantization	Svala Sverrisdottir – UC Berkeley
15:00 – 15:30	Hankel polynomials and sum of even powers	Matteo Bechere (DC5) – University of Konstanz
15:30 – 16:00	Fast hierarchical B-spline matrix assembly using Low-Rank approximation	Mattia Matucci (DC2) – Inria
16:00 – 16:30	Short break and open discussion
16:30 – 17:30	TENORS Supervisory Board Meeting	TENORS members only

Friday 26 September 2025

Meeting room: A701

Time	Talk	Speakers
09:00 – 10:30	Soft skills training	University of Konstanz
10:30 – 11:00	Short break and open discussion

11:00 – 12:00	Data & Software Discussion	TENORS members only
12:00 – 13:30	Lunch
13:30 – 15:30	TENORS’ DC meeting	TENORS DC only

Note: Lunches are self-paid and social dinner is offered to all participants.

Travel and Accommodation

Travel to University of Konstanz: Please find HERE for more information

Accommodation in Konstanz: Please find HERE for more information

List of suggested hotels: