matemaattinen mallintaminen

Mathematics and Statistics

About the research group

The three main focus areas of the group of Mathematics and Statistics are Mathematics, Business Mathematics, and Statistics. The group makes research especially using Mathematical and Statistical Modeling.

The members of the group are professors, post-doc researchers, and PhD students. The group has active national and international research collaboration with several researchers from different national and foreign Universities, scientific and other organizations. The members of the group publish their research mainly in international refereed journals such as Bernouilli, Journal of Functional Analysis, Journal für die Reine und Angewandte Mathematik, Mathematische Annalen, Review of Financial Studies, Stochastic Processes and their Applications.

The leader of the research group is Professor Seppo Hassi.

Research themes

Mathematics

  • Algebraic curves and function fields over finite fields
  • Algebraic number theory, character sums over finite fields 
  • Algebraic coding theory, cyclic codes and algebraic geometry codes
  • Bounded and unbounded operators in Hilbert, Pontryagin and Krein spaces 
  • Boundary value problems, moment problems, interpolation problems
  • Boundary triple and boundary pair techniques
  • Classes of complex functions and their representations
  • Lebesgue type decompositions for forms and linear operators
  • Mathematical system theory in infinite-dimensional spaces
  • Realization theory for discrete and continuous time systems
  • Reproducing kernel spaces in Hilbert and Pontryagin space setting 
  • Semibounded and sectorial forms and their representations
  • Spectral theory and associated complex functions
  • Weyl functions, transfer functions and their realizations

 

Business Mathematics

  • Financial engineering
  • Fractional Brownian motion
  • Gaussian processes
  • Mathematical finance
  • Statistics of stochastic processes
  • Stochastic analysis
  • Volterra processes

Statistics

  • Financial econometrics and time series
  • Financial event study methodology
  • Multivariate statistics
  • Non-parametric statistics
  • Structural equation models

News and events

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Publications

Publications in the SoleCRIS research database

2024

  • Diagnostic Accuracy of MRI in Detecting the Perineural Spread of Head and Neck Tumors: A Systematic Review and Meta-Analysis

    Abdullaeva, Umida; Pape, Bernd; Hirvonen, Jussi, 2024, Diagnostics, 14, 1, 113, DOI: 10.3390/diagnostics14010113, A2 Review article in a scientific journal (peer-reviewed)

  • The aetiology of preterm birth and risks of cerebral palsy and cognitive impairment: a systematic review and meta-analysis

    Ylijoki, Milla; Sentenac, Mariane; Pape, Bernd; Zeitlin, Jennifer; Lehtonen, Liisa, 2024, Acta paediatrica, 113, 4, 643-653, DOI: 10.1111/apa.17118, A2 Review article in a scientific journal (peer-reviewed)

  • Professional Investment Portfolio Management: Boosting Performance with Machine-Made Portfolios and Stock Market Evidence

    Kolari, James W.; Liu, Wei; Pynnönen, Seppo, 2024, 1-255, DOI: 10.1007/978-3-031-48169-7, C1 Scientific book (peer-reviewed)

  • Dynamic risk adjustment in long-run event study tests

    Han, Yao; Kolari, James W.; Pynnonen, Seppo, 2024, Applied economics, 56, 6, 744-764, DOI: 10.1080/00036846.2023.2287554, A1 Journal article (peer-reviewed)

  • Prediction of Gaussian Volterra processes with compound Poisson jumps

    Maleki Almani, Hamidreza; Shokrollahi, Foad; Sottinen, Tommi, 2024, Statistics and probability letters, 208, 110054, DOI: 10.1016/j.spl.2024.110054, A1 Journal article (peer-reviewed)

2023

  • Burden of mental, behavioral, and neurodevelopmental disorders in the Finnish most preterm children: a national register study

    Leppänen, Marika; Pape, Bernd; Ripatti, Liisi; Karukivi, Max; Haataja, Leena; Rautava, Päivi, 2023, European child and adolescent psychiatry, 33, 2, 431-438, DOI: 10.1007/s00787-023-02172-1, A1 Journal article (peer-reviewed)

  • Diagnostic performance of short noncontrast biparametric 3‑T MRI for tonsillar infections: comparison with a full protocol including contrast‑enhanced sequence

    Vierula, Jari‑Pekka; Nurminen, Janne; Jussila, Ville; Nyman, Mikko; Heikkinen, Jaakko; Pape, Bernd; Sorvettula, Kaarlo; Mattila, Kimmo; Hirvonen, Jussi, 2023, European radiology experimental, 7, 1, 65, DOI: 10.1186/s41747-023-00379-0, A1 Journal article (peer-reviewed)

  • Long-range dependent completely correlated mixed fractional Brownian motion

    Dufitinema, Josephine; Shokrollahi, Foad; Sottinen, Tommi; Viitasaari, Lauri, 2023, Stochastic processes and their applications, 170, 104289, DOI: 10.1016/j.spa.2023.104289, A1 Journal article (peer-reviewed)

  • Multi-mixed fractional Brownian motions and Ornstein–Uhlenbeck processes

    Maleki Almani, Hamidreza; Sottinen, Tommi, 2023, Modern stochastics : theory and applications, 10, 4, 343–366, 1, DOI: 10.15559/23-VMSTA229, A1 Journal article (peer-reviewed)

  • On Sharp Rate of Convergence for Discretization of Integrals Driven by Fractional Brownian Motions and Related Processes with Discontinuous Integrands

    Azmoodeh, Ehsan; Ilmonen, Pauliina; Shafik, Nourhan; Sottinen, Tommi; Viitasaari, Lauri, 2023, Journal of theoretical probability, Published: 10 July 2023, DOI: 10.1007/s10959-023-01272-7, A1 Journal article (peer-reviewed)

  • Investment Valuation and Asset Pricing : Models and Methods

    Kolari, James W.; Pynnönen, Seppo, 2023, DOI: 10.1007/978-3-031-16784-3, C1 Scientific book (peer-reviewed)

kirjan kansi

Contributions to Mathematics and Statistics.
Essays in honor of Seppo Hassi

H.S.V. de Snoo & H.L. Wietsma (toim.)

Professori Seppo Hassin syntymäpäivän kunniaksi kirjoitettu juhlakirja sisältää 13 tieteellistä artikkelia. Kirja keskittyy kolmeen eri aiheeseen:  funktionaalinen analyysi ja operaattoriteoria, reuna-arvo-ongelmat, tilastotiede, stokastiikka ja matematiikan historia.

Acta Wasaensia 462. Vaasan yliopisto. 2021
Julkaisun pdf

Reseach group members

Seppo Hassi

Seppo Hassi

Professor
School of Technology and Innovations, Mathematics
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+358294498279
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Seppo Pynnönen

Seppo Pynnönen

Professor Emeritus
School of Technology and Innovations, Mathematics
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+358294498311
Fabriikki F488
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Tommi Sottinen

Tommi Sottinen

Professor
School of Technology and Innovations, Mathematics
firstname.lastname@uwasa.fi
+358294498317
Fabriikki F485
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Ilkka Virtanen

Ilkka Virtanen

Professor Emeritus
School of Technology and Innovations, Mathematics
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Fabriikki
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Matti Laaksonen

Matti Laaksonen

Teacher
School of Technology and Innovations, Mathematics
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Marko Moisio

Marko Moisio

University Lecturer
School of Technology and Innovations, Mathematics
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+358294498300
Fabriikki F492
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Bernd Pape

Bernd Pape

Lecturer
School of Technology and Innovations, Mathematics
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+358294498310
Fabriikki F484
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Lassi Lilleberg

Lassi Lilleberg

Teacher
School of Technology and Innovations, Energy Technology
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Fabriikki F496
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Foad Shokrollahi

Foad Shokrollahi

Assistant Professor
School of Technology and Innovations, Mathematics
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+358294498603
Fabriikki F493
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Hamidreza Maleki Almani

Hamidreza Maleki Almani

Doctoral Researcher
School of Technology and Innovations, Mathematics
Fabriikki F494
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