Per Christian Hansen
Professor, dr.techn.
VILLUM Investigator

My specialization is numerical analysis, numerical linear algebra, iterative reconstruction methods, and computational methods for inverse problems. My research lies within applied mathematics: theoretical analysis (e.g., perturbation theory and convergence analysis) goes hand in hand with practical development and implementation of robust, adaptive and efficient computational methods. For more deatails, see my CV and a portrait of me.

These slides give a short introduction to inverse problems and uncertainty quantification. And these slides give a brief overview of my current research in inverse problems.

My results are of general interest in scientific computing and, in particular, computational inverse problems. Some of my work has applications in computed tomography for materials science, image deblurring, signal analysis, and antenna design. I have (co-)written 5 books, 100+ scientific papers and several Matlab software packages.

I am a VILLUM Investigator and I am heading the research initiative CUQI at DTU for Computational Uncertainty Quantification for Inverse Problems. We create a modeling and computational platform, suited for non-experts, to characterize and study how errors and uncertainties in the data and the mathematical models propagate to the computed solution to the inverse problem.

Contact Information Blue text is a link

Department of Applied Mathematics and Computer Science (DTU Compute)
Section for Scientific Computing
Technical University of Denmark
DK-2800 Kgs. Lyngby, Denmark

Office: building 303B, room 114

URL: (this page)
Phone: +45
Mobil: +45

Secretary: Anette Iversen, Building 303B, room 005. Phone: +45 Email:

Personal Data Blue text is a link

SIAM Fellow of 2015 for contributions to computational methods for rank-deficient and discrete ill-posed problems and regularization techniques.

I celebrated my 40th anniversary of working for the Danish government on August 26, 2022 with an event Inverse Problems and All That Jazz.

Research Projects Click the logos for information



Professional Memberships Blue text is a link

Life Hacks

  • Drinking coffee without caffeine is like doing computations without rounding errors.

  • Man skal ikke sige nej til hvad som helst

  • Hvis der er noget du ikke orker, så bare gå en omvej