Journées Approximation, 6th edition

15 mai 2024, 08:00 → 17 mai 2024, 14:35 Europe/Paris

Salle de réunion, premier étage (Bât. M2, Cité Scientifique, ULille)

The international conférences "Journées Approximation" in Lille give opportunity for exchanging ideas by french, belgian and other european colleagues working on approximation theory, numerical  linear algebra and their applications. The ja2024 edition will be a two and a half day meeting in May 2024  from Wednesday 15th at 9 a.m. to Friday 17th at 2 p.m. with 40 minutes talks only by invitation. 

There will be also a poster session, please let us know if you want to contribute. ja2024 will also be the 2024 Annual Meeting of the EXPOWER network.

Inscriptions (free but mandatory) are open until April 15, 2024.

Some updated practical informations can be found here. Please find here a Zoom link for the talks of the Journées Approxiation. 

Invited talks are given by

• Laurent Baratchart (INRIA Nice, France)
• Andreas Beutler (Mahr, Goettingen, Germany)
• Amilcar Branquinho (Univ. Coimbra, Portugal)
• Jacob Christiansen (U Lund, Sweden)
• Dirk De Villiers (Stellenbosch U, South Africa)
• Ana Foulquié Moreno (U Aveiro, Portugal)
• George Labahn (U Waterloo, Canada)
• Wen-shin Lee (U Stirling, GB)
• Ana Filipa Loureiro (Kent U, GB)
• Bernard Mourrain (INRIA Nice, France)
• Miao-Jung Yvonne Ou (University of Delaware, US)
• Miguel Piñar (U Grenada, Espagne)
• Gerlind Plonka-Hoch (U Göttingen, Germany)
• Oliver Salazar (ING Belgium)
• Ramonika Sengupta (Eindhoven U, Netherlands)
• Nick Trefethen (Havard U, US)
• Walter Van Assche (KU Leuven, Belgium)
• Andre Weideman (Stellenbosch U, South Africa)
• Franck Wielonsky (Aix-Marseille U, France)
• Maxim Yattselev (Indiana U Purdue, US)

The organization committee: 

• Bernhard Beckermann
• Ana Matos
• Laurent Smoch

 

ja2024_practical_informtions.pdf

mercredi 15 mai

09:30 → 10:10 Polynomial and rational convergence rates for Laplace problems on planar domains

Orateur: Nick Trefethen (Université de Harvard, USA)

TREFETHEN__Nick.pdf

10:10 → 10:50 On Strong Asymptotics of Multiple Orthogonal Polynomials for Angelesco Systems

Orateur: Maxim Yattselev (Indiana University (USA))

YATTSELEV__Maxim.pdf

10:50 → 11:10 coffee break

11:10 → 11:50 Incursions on the discrete Painlevé I hierarchy

Orateur: Ana Loureiro (University of Kent, UK)

LOUREIRO__Ana.pdf

11:50 → 12:30 Adaptive Thiele Interpolation

Orateur: Oliver Salazar (ING Belgium)

SALAZAR_CELIS__Oliver.pdf

12:40 → 14:20 lunch Ascotel

14:30 → 15:10 Rational Fourier Approximation: Computation and Applications

Orateur: André Weideman (Stellenbosch University, South Africa)

WEIDEMAN__André.pdf

15:10 → 15:50 Spectral theorem for bounded banded matrices with positive bidiagonal factorization

Orateur: Ana Foulquié (Universidade Aveiro, Portugal)

FOULQUIÉ_MORENO__Ana.pdf

15:50 → 16:10 coffee break

16:10 → 16:50 A least squares analog to the Nuttall-Pommerenke theorem

Orateur: Laurent Baratchart (INRIA)

BARATCHART__Laurent.pdf

16:50 → 17:30 More than sparse interpolation: applications in signal processing and beyond

Orateur: Wen-shin Lee (University of Stirling, UK)

LEE__Wen-shin.pdf

jeudi 16 mai

09:30 → 10:10 Christoffel functions for multiple orthogonal polynomials

Orateur: Walter Van Assche (KU Leuven, Belgium)

VAN_ASSCHE__Walter.pdf

10:10 → 10:50 Antenna Array Synthesis Using Variable Projection

Orateur: Ramonika Sengupta (Eindhoven University, Netherlands)

SENGUPTA__Ramonika.pdf

10:50 → 11:10 coffee break

11:10 → 11:50 Markov chains in the theory of multiple orthogonal polynomials

Orateur: Amilcar Branquinho (Universidade de Coimbra, Portugal)

BRANQUINHO__Amílcar.pdf

11:50 → 12:30 Algorithms for normal forms of matrices of integers

Orateur: George Labahn (University of Waterloo)

LABAHN__George.pdf

12:40 → 14:20 lunch Ascotel

14:30 → 15:10 Sobolev orthogonality and boundary value problems

Orateur: Miguel Pinar (Universidad Granda, Spain)

PIÑAR__Miguel.pdf

15:10 → 15:40 Defects and Dirt in Test and Measurement

Orateur: Andreas Beutler (Mahr, Göttingen)

BEUTLER__Andreas.pdf

15:40 → 16:50 Coffee break & Poster Session & Meeting Expower

15:40 Arnoldi orthogonalization to tackle Sobolev least squares problem

Orateur: M. Amin Faghih (KU Leuven (Belgium))

FAGHIH__Amin.pdf

15:40 The Lanczos Tau Framework for Time-Delay Systems

Orateurs: M. Evert Provoost (KU Leuven, Belgium), M. Wim Michiels (KU Leuven, Belgium)

PROVOOST__Evert.pdf

16:50 → 17:30 Optimal prediction measures and polynomials of extremal growth

Orateur: Franck Wielonsky (Université Aix-Marseille)

WIELONSKY__Franck.pdf

17:30 → 18:10 Fractional time derivative through the lens of Herglotz-Nevanlinna function theory

Orateur: Yvonne Ou (University of Delaware, USA)

OU__Miao-Jung_Yvonne.pdf

18:30 → 21:30 Conference diner : Restaurant La table

vendredi 17 mai

09:30 → 10:10 MOCCA: A fast Algorithm for parallel MRI reconstruction using model based coil calibration

Orateur: Gerlind Plonka (Université de Göttingen)

PLONKA-HOCH__Gerlind.pdf

10:10 → 10:50 Chebyshev polynomials and Widom factors

Orateur: Jacob Christiansen (University of Lund, Sweden)

CHRISTIANSEN__Jacob.pdf

10:50 → 11:10 coffee break

11:10 → 11:50 Sub-Sampled Exponential Analysis in Antenna Applications

Orateur: Dirk de Villiers (Stellenbosch University, South Africa)

DE_VILLIERS__Dirk.pdf

11:50 → 12:30 Approximation of positive polynomials for global optimization

Orateur: Bernard Mourrain (INRIA)

MOURRAIN__Bernard.pdf

12:40 → 14:20 lunch at Ascotel