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Bild Prof. Dr. Armin Lechleiter

Prof. Dr. Armin Lechleiter

In 2011, Armin Lechleiter arrived in Bremen and started to built up the working group Inverse Problems at ZeTeM. He passed away on January 28, 2018. His colleagues at ZeTeM mourn for this wise, always helpful, and brave friend.

An obituary

Armin's most recent website (summer 2017) is following.

Old news ...


Undergraduate studies in Mathematics at Universität Karlsruhe
Bachelor (Licence) in Mathematics at ENS Lyon (France)
Diploma in Mathematics at Universität Karlsruhe
Graduate studies (with A. Kirsch) at KIT
PostDoc (DeFI, INRIA Saclay & Ecole Polytechnique, France)
Researcher (DeFI, INRIA Saclay & Ecole Polytechnique, France)
Assistant professor (W1) at ZeTeM (Universität Bremen)
Professor (W2) at ZeTeM (Universität Bremen)


Research Areas

Leader of Projects

  1. Regularization techniques in Banach spaces applied to inverse Problems (16.07.2014 - 16.10.2017)
  2. Inside-Outside Duality and Non-Destructive Testing (01.07.2013 - 30.06.2016)
  3. Efficient Simulation of Acoustic Underwater Waves (01.11.2012 - 31.10.2015)
  4. Inverse Scattering in the Time Domain (01.01.2011 - 31.12.2013)
  5. Electromagnetic Inverse Scattering from Periodic Structures (01.10.2009 - 31.10.2014)

Courses (Selection)complete list

  1. Numerik 2 (Sommersemester 2017)
  2. Parameteridentifikation und PDEs (Sommersemester 2017)
  3. Numerik 1 (Wintersemester 2016/2017)
  4. Introduction to Mathematical Parameter Identification (Wintersemester 2016/2017)
  5. Applications of Mathematical Parameter Identification (Wintersemester 2016/2017)

Theses (Selection)complete list

  1. Identifikation eines zeitabhängigen Parameters einer Wellengleichung (Thies Gerken)
  2. Akustische Streuprobleme auf einem biperiodischen Gebiet im R³ mit einer lokalen Störung (Alexander Konschin)
  3. Bestimmung geometrischer Parameter von Glasfasern aus Streulichtmustern (Vitali Gerlinski)
  4. Direkte und inverse Probleme für die Stokes-Gleichung (Dennis Zvegincev)
  5. Detektion kleiner Inklusionen durch Strom-Spannungs-Messungen (Matthias Otten)

Publications (Selection)complete list

  1. F. Cakoni, H. Haddar, A. Lechleiter.
    On the factorization method for a far field inverse scattering problem in the time domain.
    SIAM Journal on Mathematical Analysis, 51(2):854-872, 2019.

    DOI: 10.1137/18M1214809

  2. F. Bürgel, K. Kazimierski, A. Lechleiter.
    IPscatt—A MATLAB Toolbox for the Inverse Medium Problem in Scattering.
    ACM Transactions on Mathematical Software, 45(4), 45:1–45:20, 2019.

    DOI: 10.1145/3328525

  3. A. Konschin, A. Lechleiter.
    Reconstruction of a Local Perturbation in Inhomogeneous Periodic Layers from Partial Near Field Measurements.
    Inverse Problems, 35(11), 114006, IOPscience, 2019.

    DOI: 10.1088/1361-6420/ab1c66
    online at: https://iopscience.iop.org/article/10.1088/1361-6420/ab1c66

  4. A. Kirsch, A. Lechleiter.
    A radiation condition arising from the limiting absorption principle for a closed full- or half-waveguide problem.
    Mathematical Methods in the Applied Sciences, 41(10):3955-3975, 2018.

    DOI: 10.1002/mma.4879

  5. A. Kirsch, A. Lechleiter.
    The limiting absorption principle and a radiation condition for the scattering by a periodic layer.
    SIAM Journal on Mathematical Analysis, 50(3):2536-2565, 2018.

    DOI: 10.1137/17M1118920