• PL 68 (Pietari Kalmin katu 5)



1997 …2025

Research output per year

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Personal profile

Description of research and teaching

Personal home page: https://www.mv.helsinki.fi/home/lassas/index.html

Fields of Science

  • 111 Mathematics

International and National Collaboration Publications and projects within past five years.


The Light Ray Transform on Lorentzian Manifolds

Lassas, M., Oksanen, L., Stefanov, P. & Uhlmann, G., 27 Feb 2020, In : Communications in Mathematical Physics. 31 p.

Research output: Contribution to journalArticleScientificpeer-review

All-optical majority gate based on an injection-locked laser

von Lerber, T., Lassas, M., Lyubopytov, V. S., Ylinen, L., Chipouline, A., Hofmann, K. & Küppers, F., 10 Oct 2019, In : Scientific Reports. 9, 7 p., 14576.

Research output: Contribution to journalArticleScientificpeer-review

Open Access

Correlation imaging in inverse scattering is tomography on probability distributions

Caro, P., Helin, T., Kujanpää, A. & Lassas, M., Jan 2019, In : Inverse Problems. 35, 1, 20 p., 015010.

Research output: Contribution to journalArticleScientificpeer-review

Determination of a Riemannian manifold from the distance difference functions

Lassas, M. & Saksala, T., Apr 2019, In : Asian Journal of Mathematics. 23, 2, p. 173-199 27 p.

Research output: Contribution to journalArticleScientificpeer-review

Discrete regularization and convergence of the inverse problem for 1+1 dimensional wave equation

Korpela, J., Lassas, M. & Oksanen, L., Jun 2019, In : Inverse problems and imaging. 13, 3, p. 575-596 22 p.

Research output: Contribution to journalArticleScientificpeer-review


Centre of Excellence in Inverse Modelling and Imaging

Lassas, M., Siltanen, S., Piiroinen, P., Bubba, T., Balehowsky, T., Meaney, A., Latva-Äijö, S., Kujanpää, A., Liimatainen, T. J., Ylinen, L., Korpela, J., Helin, T., Santacesaria, M., Kyriakopoulou, D., Mach, M., Zhang, Z., Murthy, R., Dunlop, M., Rautio, S. I., Purisha, Z., Juvonen, M., Hyttinen, V., Enwald, J., Virtanen, H. J., Suomenrinne-Nordvik, A., Lehtonen, J., Ola, P., Ratti, L., Partio, H., Latva-Äijö, S., Enwald, J. & Agnelli, J. P.


Project: Research project

Dynamic X-ray sparse tomography

Siltanen, S., Lassas, M. & Elefante, P.

15/08/2014 → …

Project: Research project

Center of Excellence on Inverse Problems

Lassas, M., Siltanen, S. & Hyvärinen, A.


Project: Research project

Academy professor

Lassas, M.


Project: Research project


Calderon prize

Matti Lassas (Recipient), 2007

Prize: Prizes and awards

Vaisala Prize

Matti Lassas (Recipient), 2004

Prize: Prizes and awards


Hiroshi Isozaki

Matti Lassas (Host)
18 Feb 20199 Mar 2019

Activity: Hosting a visitor typesAcademic visit at UH

MSRI, Mathematical Sciences Research Institute

Matti Lassas (Visiting researcher)
30 Sep 201923 Oct 2019

Activity: Visiting an external institution typesAcademic visit to other institution

The 9th International Conference on Inverse Problems and Related Topics

Matti Lassas (Member of organizing committee)
13 Aug 201817 Aug 2018

Activity: Participating in or organising an event typesOrganisation and participation in conferences, workshops, courses, seminars

Geometric inverse problems with random and unknown sources

Matti Lassas (Speaker)
20 Aug 201823 Aug 2018

Activity: Talk or presentation typesInvited talk

Manifold learning and an inverse problem for a wave equation

Matti Lassas (Speaker)
24 Jan 201826 Jan 2018

Activity: Talk or presentation typesInvited talk