### Team

**Lauren Terruso****Office: **MATH 420**Email: **lterruso@purdue.edu

**Florian Faucher****Office: **MATH 413**Email: **ffaucher@math.purdue.edu

#### Current Postdocs

**Jie Chen****PhD**: Department of Mathematics, University of Washington**Office**: MATH 413**Email**: chen1430@purdue.edu

**Justin Tittelfitz****PhD**: Department of Mathematics, University of Washington**Office**: MATH 417**Email**: jtittelf@math.purdue.edu

#### Former Postdocs

**A.A. Duchkov **

**PhD**: Institute of Peroleum Geological and Geophysics, Russian Academy of Science, Siberian Branch, Novosibirsk, Russia**Years**: 2005-2009

**Current**: Institute of Peroleum Geological and Geophysics, Russian Academy of Science, Siberian Branch, Novosibirsk, Russia

**M. Carlsson PhD**: Department of Mathematics, Lund University

**Years**: 2008-2011

**Current:**Department of Mathematics, Lund University

**H. Wendt **

** PhD**: Signal Processing and Physics, ENS de Lyon

**Years**: 2008-2011

**Current:**Institut de Recherche en Informatique de Toulouse, Université de Toulouse

**S.F. Holman **

** PhD**: Department of Mathematics, University of Washington

**Years**: 2010-2013

**Current:**University of Manchester, England

**Z. Guo **** PhD**: Department of Mathematics, University of California, Los Angeles

**Years**: 2011-2013

**Current:**

**H. Pham **** PhD**: Department of Mathematics, Stanford University

**Years**: 2012-2013

**Current**: Department of Mathematics, Purdue University

#### Current PhD Students

**Paul Kepley****Office**: MATH 415**Email**: pkepley@purdue.edu ** Department**: Mathematics

**Inverse boundary value problem for the wave equation: Direct and iterative nonlinear reconstruction of a (smooth) metric**

**Project**:

**Xiao Liu****Office**:** **MATH 435**Email**:** **liu867@purdue.edu**Department**: Mathematics**Project**: Massively parallel direct structured solvers based on randomized sampling and fast nonlinear iterative methods for time-harmonic seismic inverse boundary value problems

**Lei Qin****Office**:** **MATH 441**Email**: qin48@math.purdue.edu**Department**: Earth, Atmospheric and Planetary Sciences**Project**: A study of multi-frequency anisotropic elastic full waveform inversion

**Jacob Shapiro**

**Office**: MATH 441**Email**: shapiroj@purdue.edu**Department**: Mathematics**Project**: High-frequency analysis of the inverse boundary value problems for the wave and Helmholtz equations

**Jia Shi****Office**: MATH 415**Email**: shi126@purdue.edu **Department**: Earth, Atmospheric and Planetary Sciences**Project**: Multi-frequency elastic full waveform inversion and nonlinear surfacewave tomography with finite data

**Ruichao Ye****Office**: MATH 415**Email**: rye@purdue.edu **Department**: Earth, Atmospheric and Planetary Sciences**Project**: Bandlimited time-domain full waveform inversion for piecewise smooth wavespeeds based on unstructured meshing

**Jian Zhai****Office**: MATH 441**Email**: zhai12@math.purdue.edu**Department**: Mathematics**Project**: Analysis of the inverse boundary value problem for time-harmonic elastic waves in the presence of conormal singularities

#### Former PhD Students

**M.J.N. van Stralen**

**PhD**: Department of Electrical Engineering, Delft University of Techology

**Years**: 1994-1997

**Thesis**: Directional decomposition of electromagnetic and acousticwave fields**Current**:

**S. Brandsberg-Dahl**

**PhD**: Department of Geophysics, Center for Wave Phenomena, Colorado School of Mines

**Years**: 1998-2001

**Thesis**: Imaging-inversion and migration velocity analysis in the scattering-angle/azimuth domain**Current**: PGS

**J.H.L. Le Rousseau****PhD**: Department of Geophysics, Center for Wave Phenomena, Colorado School of Mines**Years**: 1998-2001

**Thesis**: Microlocal analysis of wave-equation imaging and generalized-screen propagators** Current:** Laboratoire de Mathématiques - Analyse, Probabilités, Modélisation, Université d'Orléans

**A.E. Malcolm****PhD**: Department of Geophysics, Center for Wave Phenomena, Colorado School of Mines**Years**: 2000-2005

**Thesis**: Data continuation for data regularization and internal multiples**Current:** Massachusetts Institute of Technology

**H. Douma**

**PhD**: Department of Geophysics, Center for Wave Phenomena, Colorado School of Mines**Years**: 2001-2006

**Thesis**: A hybrid formulation of map migration and wave-equation-based migration using curvelets**Current**: Ion Geophysical

**V. Brytik**

**PhD**: Department of Mathematics, Purdue University

**Years**: 2005-2010

**Thesis**: Mode decoupling of the elastic wave equation, ‘reverse-time migration’, and sensitivity analysis of wave-equation tomography using wave packets**Current**: ExxonMobil

**S. Wang****PhD**: Department of Earth, Atmospheric and Planetary Sciences, Purdue University**Years**: 2007-2012

**Thesis**: 3D modeling of time-harmonic seismic waves via a massively parallel structured multifrontal solver and applications**Current**: ConocoPhillips

**L. Qiu****PhD**: Department of Mathematics, Purdue University**Years**: 2008-2013

**Thesis**: An inverse boundary value problem for the Helmholtz equation: Conditional stability and convergence of multi-level, multi-frequency iterative methods for nonlinear reconstruction of the wavespeed**Current**: Institute for Mathematics and Applications, University of Minnesota

#### Former PhD Co-Advisees

**S.K. Foss**

**PhD**: Department of Mathematics, Faculty of Information Technology, Mathematics and Electrical Engineering, Norwegian University of Science and Technology, Trondheim, Norway

**Years**: 2001-2004

**Thesis**: Depth consistent PP and PS angle tomography**Current**: Statoil

**P. Wang****PhD**: Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge MA**Years**: 2001-2007

**Thesis**: Imaging structure at and near the core mantle boundary using a generalized Radon transform**Current**: CGG

**Q. Cao****PhD**: Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge MA**Years**: 2006-2011

**Thesis**: Seismic imaging of the mantle transition zone**Current**: Shell

**X. Shang****PhD**: Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge MA**Years**: 2007-2013**Thesis**: Inverse scattering: Theory and application to the imaging of Earth’s seismic discontinuities**Current**: Shell