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The "Research ITalian network on Approximation (RITA)" groups several italian numerical analysts working on Multivariate Approximation. In this website we collect all research topics and activites of RITA members and institutions.


At the moment the network is among the following institutions and people:
  • Department of Mathematics "Tullio Levi-Civita", University of Padova

Topics: kernel methods; meshless approximation and applications; polynomial, trigonometric and rational interpolation and approximation; quadrature and cubature formulas; approximation theory in medical imaging

International collaborations: B. Bauman (Lawrence Livermore National Laboratory), J.-P. Calvi (Univ. of Toulouse III), K. Hormann (Univ. of Lugano), A. Iske (Univ. of Hamburg), A. Kroo (Hungarian Academy of Sciences, Budapest), P. Leopardi (Australian Gov. Bureau of Meteorology, Melbourne), N. Levenberg (Indiana Univ., Bloomington), R. Schaback (Univ. of Goettingen), K. Usevich (CNRS, Grenoble), Y. Xu (Univ. of Oregon, Eugene)

Visiting 2017: A. Kroo (Hungarian Academy of Sciences, Budapest) 8/1-8/4 2017, A. Neisy (Allameh Tabataba'i Univ.) 19/7-22/8 2017,  W. Erb (Univ. of Hawaii, Honolulu) 24-28/7 2017, A. Weinmann (Univ. of Darmstadt) 24-28/7 2017, M. Buhmann (Univ. of Giessen) 30/10-4/11 2017, H. Wendland (Univ. of Bayreuth) 6-27/11 2017 [seminar-abstract]

Visiting 2018: N. Levenberg (Indiana Univ., Bloomington) 27/4-5/5 2018, M. Slawinski (Memorial University of Newfoundland) 18-22/6 2018
  • Department of Computer Science, University of Verona

Topics: polynomial, trigonometric and rational interpolation and approximation; matrix exponential approximation by interpolation

International collaborations: T. Bloom (Univ. of Toronto), J.-P. Calvi (Univ. of Toulouse III), K. Hormann (Univ. of Lugano), N. Levenberg (Indiana Univ., Bloomington), A. Ostermann and S. Rainer (Univ. of Innsbruck), S. Waldron (Univ. of Auckland)

Visiting 2017: A. Ostermann (Univ. of Innsbruck) 24/4-5/5 2017

  • Department of Mathematics and Applications, University of Milano-Bicocca

Topics: kernel methods; meshless approximation and applications; subdivision schemes; wavelets; frames; mathematical signal processing

International collaborations: G. Albrecht (Univ. of Medellin), M. Charina (Univ. of Wien), N. Dyn (Tel Aviv Univ.), V. Hernandez Mederos and J. Estrada Sarlabous (ICIMAF, Havana), J.-L. Merrien (INSA Toulouse), C. Rabut (INSA Toulouse), T. Sauer (Univ. of Passau), R. Schaback (Univ. of Goettingen), J. Stockler (TU Dortmund), M. Unser (EPFL Lausanne), J. Yoon (Ewha W. Univ. Seul)

  • Department of Mathematics "Giuseppe Peano", University of Torino

Topics: kernel methods; meshless approximation and applications; approximation theory in medical imaging; approximation algorithms for biological models

International collaborations: S. Demertzis (Cardiocentro Ticino, Lugano), G.E. Fasshauer (Colorado School of Mines, Golden), M. Haque (Univ. of Nottingham), E. Larsson (Uppsala Univ.), H. Malchow (Osnabrueck Univ.), M. Mayr (FH Wiener Neustadt), M.J. McCourt (SigOpt, Inc., San Francisco), B. Quatember and W. Recheis (Univ. of Innsbruck), H. Wendland (Univ. of Bayreuth)

  • Department of Industrial Engineering, University of Firenze

Topics: subdivision schemes; wavelets; frames; mathematical signal processing

International collaborations: M. Charina (Univ. of Wien), N. Dyn (Tel Aviv Univ.), J.-L. Merrien (INSA Toulouse), T. Sauer (Univ. of Passau), J. Stockler (TU Dortmund), M. Unser (EPFL Lausanne), J. Yoon (Ewha W. Univ. Seul)

Visiting 2017: J.-L. Merrien (INSA Toulouse) 22-28/1 2017

  • Department of Mathematics and Computer Science, University of Perugia

Topics: approximation theory by sampling-type operators, approximation by neural network type operators, approximation theory in medical imaging, mathematical image processing, signal theory, mathematical methods for civil and energetic engineering

International collaborations: P.L. Butzer and R.L. Stens (Aachen), H. Karsli (Abant Izzet Baysal Universitesi), E. Lyflyand (Bar-llan Univ.), J. Musielak (Poznan), M. Skopina (S. Petersburg State Univ.), S. Tikhonov (Barcellona)

Visiting 2017: S. Tikhonov (Barcellona), E. Lyflyand (Bar-llan Univ.) 14-20/2 2017

Visiting 2018: M. Skopina (S. Petersburg State Univ.) 14-21/1/2018
  • Department of Basic and Applied Sciences for Engineering, University of Roma "La Sapienza"

Topics: subdivision schemes; wavelets; mathematical signal processing; fractional differential problems; undetermined inverse problems

International collaborations: D. Calvetti and F. Somersalo (Case Western Reserve Univ., Cleveland)

  • Departments of Mathematics and Applications "R. Caccioppoli" and Agricultural Sciences, University of Naples Federico II
Topics: kernel methods; meshless approximation and applications; mathematical signal processing; high performance computing

International collaborations: G. Mei (University of Geoscience, Beijing), P. Assari (Bu-Ali Sina University)
  • CNR National Research Council of Italy - IAC Institute, Naples
Topics: meshless approximation and applications; numerical methods for integral equations; polynomial interpolation and approximation; quadrature and cubature formulas; singular problems; wavelets

International collaborations: F. Filbir (Helmholtz Munich), P. Junghanns (TU Chemitz), M. Van Barel (KU Leuven)
  • Department of Mathematics, Computer Science and Economy, University of Basilicata, Potenza

Topics: numerical methods for integral equations; polynomial interpolation and approximation; quadrature and cubature formulas; singular problems

International collaborations: P. Junghanns (TU Chemnitz), G.V. Milovanovic (Serbian Academy of Sciences, Beograd), J. Szabados (Hungarian Academy of Sciences, Budapest)

  • Department of Mathematics and Computer Science, University of Calabria, Cosenza

Topics: meshless approximation and applications; polynomial and rational interpolation and approximation; quadrature and cubature formulas; collocation and spectral methods for IVPs and BVPs; bisection-exclusion algorithms

International collaborations: K. Hormann (Univ. of Lugano), O. Nouisser (Univ. Ibn Tofail, Kenitra, Marocco), W.M. Abd-Elhameed (Cairo University)

Visiting 2018: T. Sauer (Univ. of Passau) 11/1 2018 [seminar-abstract], B. Zerroudi (Ibn Tofail Univ., Kenitra) 8-20/4 2018

  • Department of Information Engineering, Infrastructure and Sustainable Energy, Mediterranean University of Reggio Calabria

Topics: subdivision schemes; wavelets; frames; mathematical signal processing

International collaborations: M. Charina (Univ. of Wien), M. Holschneider (Univ. of Potsdam), T. Sauer (Univ. of Passau)

Visiting 2018: T. Sauer (Univ. of Passau) 7-13/1 2018

  • Department of Industrial and Digital Innovation, University of Palermo

Topics: kernel methods; meshless approximation and applications; wavelet and multiresolution analysis; high performance computing; BVPs; approximation algorithms for biological models

International collaborations: G.E. Fasshauer (Colorado School of Mines, Golden), F.M. Hilker (Osnabrueck Univ.), M.J. McCourt (SigOpt, Inc., San Francisco)


RITA abroad


Recent international collaborations


Research projects

Coordinator: S. De Marchi (Padova)


Research groups

Journals


Forthcoming meetings

RITA organizer: S. De Marchi (Padova)
  • MASCOT 2018: 15th Meeting on Applied Scientific Computing and Tools Grid Generation, Approximation and Visualization, October 2-5, 2018, Roma, Italy

RITA organizers: C. Conti (Firenze), F. Pitolli (Roma)


Past meetings

  • DRWA 2018: Dolomites Research Week on Approximation, September 10-14, 2018, Alba di Canazei (TN), Italy
RITA organizers: M. Caliari (Verona), R. Cavoretto (Torino), S. De Marchi (Padova), A. De Rossi (Torino), E. Perracchione (Padova), F. Piazzon (Padova), D. Poggiali (Padova), M. Vianello (Padova)

RITA organizer: E. Francomano (Palermo)

  • IWANASP18: International Workshop on Analysis and Numerical Approximation of Singular Problems, September 4-6, 2018, Cagliari, Italy

RITA organizer: L. Fermo (Cagliari)

  • Mini Symposium at CMMSE 2018: Bio-Mathematics, July 9-13, 2018, Rota, Cadiz, Spain
RITA organizer: E. Venturino (Torino)
  • Mini Symposium at SIMAI 2018: Function Approximation and Functional Equations: Theory, Numerical Methods and Applications, July 2-6, 2018, Roma, Italy
RITA Organizers: A. De Rossi (Torino), D. Occorsio (Potenza)

RITA organizer: E. Francomano (Palermo)

  • Mini Symposium at SIAM IS18: Interpolation and Approximation Methods in Imaging, June 5-8, 2018, Bologna, Italy
RITA Organizers: C. Conti (Firenze), A. De Rossi (Torino), F. Dell'Accio (Cosenza)
  • SPAN 2018: Seminari Padovani di Analisi Numerica, May 3-4, 2018, Padova, Italy

RITA organizers: E. Perracchione (Padova), F. Piazzon (Padova)

  • SimTech 2018: 2nd International Conference on Simulation Technology, March 26-28, 2018, Stuttgart, Germany
RITA organizer: G. Santin (Stuttgart)
  • DSABNS18: Dynamical Systems Applied to Biology and Natural Sciences, February 7-9, 2018, Torino, Italy
RITA organizers: R. Cavoretto (Torino), A. De Rossi (Torino), E. Venturino (Torino)
  • AMTA 2017: Approssimazione Multivariata: Teoria ed Applicazioni - 1ª Riunione Nazionale dei partecipanti alla Rete ITaliana di Approssimazione (RITA), December 8-10, 2017, Palermo, Italy [Leaflet]
RITA organizers: S. De Marchi (Padova), E. Francomano (Palermo), M. Paliaga (Palermo), M. Vianello (Padova)
  • SMART 2017: Second International Conference on Subdivision, Geometric and Algebraic Methods, Isogeometric Analysis and Refinability in iTaly, September 17-21, 2017, Gaeta, Italy
RITA organizers: C. Conti (Firenze), M. Cotronei (Reggio Calabria), F. Pitolli (Roma), L. Romani (Milano)
  • DRWA 2017: Dolomites Research Week on Approximation, September 4-8, 2017, Alba di Canazei (TN), Italy

RITA organizers: M. Caliari (Verona), R. Cavoretto (Torino), S. De Marchi (Padova), A. De Rossi (Torino), F. Piazzon (Padova), D. Poggiali (Padova), A. Sommariva (Padova), M. Vianello (Padova)

  • CMMSE 2017: 17th Conference on Computational and Mathematical Methods in Science and Engineering, July 4-8, 2017, Rota, Cadiz, Spain

RITA organizer: E. Venturino (Torino)

  • MATAA 2017: Multivariate Approximation: Theory, Algorithms & Applications, May 25-26, 2017, Torino, Italy

RITA organizers: R. Cavoretto (Torino), A. De Rossi (Torino)

RITA organizers: C. Conti (Firenze), M. Cotronei (Reggio Calabria)

  • DWCAA16: 4th Dolomites Workshop on Constructive Approximation and Applications, September 8-13, 2016, Alba di Canazei (TN), Italy
RITA organizers: L. Bos (Verona), M. Caliari (Verona), R. Cavoretto (Torino), S. De Marchi (Padova), A. De Rossi (Torino), A. Sommariva (Padova), M. Vianello (Padova)