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GSI 2021 – 5th conference on Geometric Science of Information

21/07/2021 – 23/07/2021 @ Toute la journée – As for GSI’13/GSI’15/GSI’17/GSI’19, the objective of this 5th SEE GSI’21 conference, hosted in Sorbonne University, is to bring together pure/applied mathematicians and engineers, with common interest for Geometric tools and their applications for Information analysis and Learning. It emphasizes an active participation of young researchers to discuss emerging areas of collaborative research on “Geometric Science […]

DEVI Webinar – Marc Ivaldi (TSE, EHESS)

11/02/2021 @ 10h30 – 11h30 – Agglomeration, Transport and Productivity: Evidence from Toulouse Metropolitan Area Abstract: Economic activity tends to be highly concentrated. These agglomeration or concentration forces are driven by spatial externalities on productivity, and are named agglomeration externalities. Transport improvements – by reducing the interaction cost between economic agents placed in different locations – can extend the geographic scope […]

DEVI Webinar – Paul Rochet (ENAC)

10/12/2020 @ 10h30 – 11h30 – A coupling of the spectral measures at a vertex Abstract I will introduce a particular coupling of the spectral measures at the vertices of a graph, whose moments count the rooted closed paths in the graph. The resulting joint spectral measure verifies numerous interesting properties that allow to recover minors of analytical functions of the […]

DEVI Webinar – Miguel Urdanoz (TBS)

26/11/2020 @ 10h30 – 11h30 – Airline Scheduling: learning from past errors Abstract On time performance is a key attribute to attract airline’s customers. Airlines can control on time performance by enlarging schedule times and indeed airlines have been doing so over the last decades although this implies higher costs for their operations. For instance, according to Zhang et al (2018) […]

DEVI Webinar – Bertrand Jouve (CNRS)

12/11/2020 @ 10h30 – 11h30 – Graph Mining by Vertex Dismantlings Abstract When considering the topology of complex networks, an important question is how local topological constraints impact the overall topology of the network. This issue is addressed from a mathematical perspective by examining some particular families of graphs. For these graphs, the results of an exploration of the vertices in […]

DEVI Seminar – Pierre-Cyril Aubin-Frankowski (Mines ParisTech)

08/10/2020 @ 10h30 – 11h30 – State-constrained Linear-Quadratic Optimal Control as a Kernel Regression with Hard Shape Constraints Abstract Regression problems in control or machine learning typically involve shape constraints, such as positivity or monotonicity on a prescribed compact set. Such constraints stem from qualitative priors or physical constraints, and can often be written as an infinite number of pointwise inequalities. […]

DEVI Seminar – Ricardo Flores-Fillol (Universitat Rovira i Virgili, Tarragona, Spain)

24/09/2020 @ 10h30 – 11h30 – Market structure and quality determination for complementary products: Alliances and service quality in the airline industry (with Jan K. Brueckner) Abstract This paper explores the effect of market structure on quality determination for complementary products. The focus is on the airline industry and the effect of airline alliances on flight frequency, an important element of […]

DEVI Seminar – Isabelle Laplace & Pascal Lezaud (ENAC)

10/09/2020 @ 10h30 – 11h30 – Environmental challenges and the future of air transport (the seminar will be given in French) Abstract The federation’s ESTEAM group has written a white paper on the future of air transport in light of environmental challenges. The purpose of the seminar is to present a few of the points that are covered in this white […]

Webinar DEVI – Tat-Dat To (ENAC)

25/06/2020 @ 10h30 – 11h30 – A modification of quasi-Newton’s methods helping to avoid saddle points Résumé: We propose a new modification of quasi-Newton’s methods, namely New Q-Newton’s method. The main idea is to approximate the Hessian matrix by a invertible (not necessarily positive definite) symmetric matrix, then update the Newton step by the difference of the projections of the standard […]