Department of Mathematics and Systems Analysis

Current




 

Summer jobs at the department

26. January 2017
The Department of Mathematics and Systems Analysis is seeking

summer trainees in mathematics and systems analysis

to work on their bachelor's thesis or carry out other research assistant's duties between June and August, 2017.

You can ask for more information from the faculty of Mathematics. NOTE! If you are Finnish-speaking, please read all the details from the announcement in Finnish.

The deadline for the applications is Wed 15.2.2017.

Please submit your application, cv and study record via eRecruitment system.

In research topic related matters, please contact the respective research group directly, or camillla.hollanti (at) aalto.fi. Any general questions about the recruitment process should be directed to HR, at hr-ms (at) aalto.fi.


Becoming a mathematician was a natural choice for Kaie Kubjas

24. January 2017

Assistant Professor Kaie Kubjas, what kind of research do you do?

My main field of research is applied algebraic geometry with applications in statistics, optimization and phylogenetics. Algebraic geometry studies systems of polynomial equations and inequalities. In recent projects, I have applied algebraic geometry to low-rank tensor completion and maximum likelihood estimation for evolutionary models. Maximum likelihood estimation is an optimization problem and I am especially interested in finding the correct solution with a guarantee of correctness, which standard numerical methods usually cannot provide. Other important topics in my research have been nonnegative and positive semidefinite rank that appear in the context of statistics, machine learning and complexity theory.

How did you become a researcher?

I attended mathematics competitions as a child and already then I developed passion for solving problems. Later I wanted to solve mathematical problems that other people have not explained yet, and becoming a researcher was a very natural choice for me. I became very independent already as a PhD student, as my supervisor moved to another university after helping me to choose the key research topics in the beginning. As an Assistant Professor I am privileged to choose and study the scientific problems that I find most important.

What are the highlights of your career?

In 2014-2016, I was an independent postdoctoral researcher at Aalto Science Institute and studied similar subjects as I do now. In 2014, I spent a semester at the Simons Institute in Berkeley attending the program "Algorithms and Complexity in Algebraic Geometry". In 2013, I spent a semester at the Max Planck Institute for Mathematics in Bonn. I defended my PhD thesis "Algebraic and combinatorial aspects of group-based models" in May 2013 at the Free University of Berlin.

What is the most important quality for a researcher?

I think it is necessary to identify and keep the focus on the research problems that you find most relevant. Otherwise it is very easy to get distracted as there are so many research problems one could work on. Then it is a combination of hard work and good luck finding the solutions. When it comes to getting relaxed after work, I often go to a climbing gym. When I am climbing, I cannot think of anything else except the climbing route and let the math just go.

What do you expect from the future?

I am very excited to build my own research group. It is a completely new dimension for me. I also look forward to talking to people about different applications and identifying new problems where algebraic geometry can be helpful.

Apply for TES Grants 2017

22. December 2016
TES Grants for research. Application period 9.1.-5.2.2017. More info in the website www.tekniikanedistamissaatio.fi.

Defence of dissertation in the field of mathematics, Emanuele Ventura, M.Sc., 9.1.2017

22. December 2016

Emanuele Ventura,  M.Sc., will defend the dissertation "Geometry of Real Tensors and Phylogenetics" on 9 January 2017 at 15 at the Aalto University School of Science, lecture hall M1, Otakaari 1, Espoo.

 

Professor Kristian Ranestad, University of Oslo, will act as the opponent. Custos is professor Alexander Engström, Department of Mathematics and Systems Analysis. Dissertation release is available at: http://sci.aalto.fi/en/current/events/vaitos_ventura_emanuele/.

 

Two Centre of Excellence applications selected to the second round

15. December 2016

”Centre of Excellence in Inverse Problems and Imaging” (contact person: Nuutti Hyvönen) and ”Mathematics of Computation and Information” (contact person: Camilla Hollanti) related to our department were selected to the second round of the call.

Väisälä grants

12. December 2016

Ferninand Blomqvist, Antti Ojalammi and Matias Vestberg received 25 000 € doctoral training grants from the Vilho, Yrjö and Kalle Väisälä Foundation on 12 Dec 2016.

Workshop on Nonlinear, Nonlocal Problems and Stochastic Methods

1. December 2016

The NPDE research group organizes on 7-9 Dec 2016. Over 50 participants from 12 countries. Local organizers: Juha Kinnunen, Tuomo Kuusi and Jonas Tölle.

Defence of dissertation in the field of mathematics, Helle Majander 11.11.2016

29. November 2016

 

 

Helle Majander, M.Sc., will defend the dissertation "Efficient reconstruction algorithms for three-dimensional tomographic imaging" on 11 November 2016 at 12 noon in Aalto University School of Science, lecture hall 1, Otakaari 1, Espoo. In the dissertation, we study the iterative algorithms for solving the inverse problems related to tomographic imaging. We present an efficient algorithm that can be used with different imaging modalities and we study the compensation of geometric modeling errors in particular for electrical impedance tomography.

Associate Professor Kim Knudsen, Technical University of Denmark, will act as the opponent. Custos is Professor Nuutti Hyvönen, Department of Mathematics and Systems Analysis. Dissertation release is available in Finnish at: http://sci.aalto.fi/en/current/events/vaitos_majander_helle/.

Defence of dissertation in the field of systems and operations research, Antti Toppila, M.Sc. (Tech.), 10.11.2016

29. November 2016

Antti Toppila, M.Sc. (Tech.), will defend the dissertation "Robust Reliability and Resource Allocation - Models and Algorithms" on 10 November 2016 at 12 noon in Aalto University School of Science, lecture hall H304, Otakaari 1, Espoo. The dissertation studies how to provide decision recommendations that are robust to epistemic uncertainty when making complex decisions.

Professor Enrico Zio, Politecnico di Milano, will act as opponent. Custos is professor Ahti Salo, Department of Mathematics and Systems Analysis. Dissertation release is available in Finnish at: http://sci.aalto.fi/en/current/events/vaitos_toppila_antti/.

Defence of dissertation in the field of mathematics, Janne Korvenpää, M.Sc. (Tech.), 18.11.2016

29. November 2016

Janne Korvenpää, M.Sc. (Tech.), will defend the dissertation "Nonlocal nonlinear potential theory and fractional integral operators" on 18 November 2016 at 12 noon in Aalto University School of Science, lecture hall M1, Otakaari 1, Espoo. In the dissertation, potential theory for fractional Laplace type equations is developed. These equations are nonlocal integro-differential equations having many similarities with typical partial differential equations.

Professor Lorenzo Brasco, University of Ferrara, will act as the opponent. Custos is Professor Juha Kinnunen, Department of Mathematics and Systems Analysis. Dissertation release is available in Finnish at: http://sci.aalto.fi/en/current/events/vaitos_korvenpaa_janne/

Defence of dissertation in the field of systems and operations research, Jussi Kangaspunta, M.Sc. (Tech.), 4.11.2016

29. November 2016

 

 

Jussi Kangaspunta, M.Sc. (Tech.), will defend the dissertation "Resource Allocation Methods for Defence and Infrastructure Systems" on 4 November 2016 at 12 noon in Aalto University School of Science, lecture hall H304, Otakaari 1, Espoo. In this dissertation, methods to support the allocation of resources to investment alternatives are studied and developed. These methods have been illustrated by examining problems from defence planning and critical infrastructure risk management.

Professor Vicki Bier, University of Wisconsin-Madison, will act as opponent. Custos is professor Ahti Salo, Department of Mathematics and Systems Analysis. Dissertation release is available in Finnish at: http://sci.aalto.fi/en/current/events/vaitos_kangaspunta_jussi/.

Stochastic Sauna workshop 20.12.2016

24. November 2016

Stochastic Sauna is a yearly workshop that brings together researchers and students working on probability, statistics, and their applications. The workshop of 2016 will be held on Tuesday, December 20, at Aalto University. The confirmed speakers are Juhan Aru (ETH Zürich), Alexander Jung (Aalto University), Lasse Leskelä (Aalto University), Jani Lukkarinen (University of Helsinki), Tommi Sottinen (University of Vaasa), and Sara Taskinen (University of Jyväskylä). More detailed and up to date information will be available on the web page.

 

Teaching demonstrations /MS site visits for a tenure track position

25. October 2016

Wed 2.11.  M1
8.30-9.00 Germain van Bever: "The central limit theorem"
9.00-9.30 Matti Vihola: "Rejection sampling"
9.30-10.00 Jevgenijs Ivanovs: "A brief introduction to Levy processes"

Thu 3.11.  M1
13.00-13.30 Kaie Kubjas: "Affine varieties - definition and first examples"
13.30-14 Juliane Müller: "Multi-objective optimization – an introduction to the topic"

Fri 4.11.  M1
13.00-13.30 Kazim Buyukboduk: A numerical criterion for diagonalizability of linear maps

Welcome to take part in these teaching demonstrations!


Site visit talks

25. October 2016

During the site visit for a tenure track position in our department, the candidates may - in addition to the teaching demonstration - give a talk their scehdule permitting. All talks will be held at the Department of Mathematics and Systems Analysis, in Otakaari 1, M-wing, 2nd floor. Welcome! (changes are possible)


Tuesday 1.11. at 10:15-11


Kaie Kubjas (Aalto Science Institute): “How to flatten a soccer ball”, in M3 (M234)
Tuesday 1.11. at 14:15-15


Matti Vihola (University of Jyväskylä): "Unbiased estimators and multilevel Monte Carlo", in M203
Wednesday 2.11. at 13:15-14:00(Note new time and place!)


Jevgenijs Ivanovs (Aarhus University): “Zooming in on a Lévy process at its supremum”, in M237
Thursday 3.11. at 16:15-17


Germain van Bever (Université Libre de Bruxelles): “Depth-based methods in statistics”, in M2 (M233)
Friday 4.11. at 10:00-10:45


Kazim Buyukboduk (Koc University, Istanbul): “Reciprocity Laws and p-adic analytic construction of rational points”, in M2 (M233)
Monday 7.11. at 16:15-17


Juliane Müller (Lawrence Berkeley National Laboratory): “Surrogate models in computationally expensive black-box simulation optimization”, in M1 (M232)


Link to abstracts

Raimo P. Hämäläinen Professor emeritus

18. August 2016
Years have gone by fast, and at the age of 68 and after 35 years in the professorship it is time to make a transition to the role of an Emeritus professor. I will continue academic work as an Emeritus professor and keep on supervising my doctoral students. I would be most delighted if you could take part in my farewell event organized on September 1st, 2016 at 1 pm in Hall B of the Aalto University, Otakaari 1 F. The speakers will include Director general of the Finnish Environment Institute Lea Kauppi, Governor of the Bank of Finland Erkki Liikanen, Vice President of the Aalto University Tuija Pulkkinen, as well as myself. Regrettably the event will be run in Finnish, but I hope you will be able to catch some of the contents anyway.

Please register here.

Master's thesis awards 2015

17. August 2016
MSc Joona Karjalainen : Convergence of estimators in large stochastic affiliation network models (supervised by prof. Lasse Leskelä). Karjalainen has gratuated from the Degree Programme of Engineering Physics and Mathematics on 16th of December 2015.

Professor Olavi Nevanlinna retired

24. May 2016

Olavi Nevanlinna’s life’s work has been at Helsinki University of Technology, the predecessor of Aalto University, and later at Aalto University. The influencer in the field of science is of course not leaving the science community, but will continue scientific activity as Professor Emeritus. The recent photograph that was unveiled at the event will be hung at the Department of Mathematics and Systems Analysis among previously retired professors and lecturers. The time elapsed between the young Nevanlinna in the drawing and the recent photograph is 58 years.

 

ACRIS is a window on Aalto research

12. May 2016
Have you ever struggled with saving research information at the end of the year?  Do you have trouble finding time to keep your information current? Do you know which of your publications can be made openly available? The new ACRIS research information system saves your time and provides an easy way to keep research information up to date throughout the year.

Verticalseat, Kunshalle Basel

12. May 2016

Security in the digital age

3. May 2016
How is OR utilized in military planning today? What kinds of OR approaches have been developed to tackle new kinds of security problems such as cyber warfare and cyber security threats?

These topics, among others, will be discussed in the seminar organized on Tuesday 10th May at 13.00 in Tieteiden talo, room 505 (Kirkkokatu 6, Helsinki).
Speakers in this seminar include experts and practitioners in military defense, cyber security, and evacuation modeling. Note that the language of the seminar is Finnish.

Pricing and registration form are from here.

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