Isaac Harris, Ph.D. 

Assistant Professor
Purdue University 
150 N. University Street, West Lafayette, IN 47907
Office: MATH 612
Email: iharris1107[at] - or - harri814[at] 

I graduated from The University of Delaware with a Ph.D. in Applied Mathematics under the advisement of Fioralba Cakoni in 2015. In August of 2018, I  joined the Department of Mathematics at Purdue University as an Assistant Professor. From Summer 2015-2018 I was at Texas A&M University as a Visiting Assistant Professor continuing my research in Inverse Problems and Scattering Theory with my mentor Bill Rundell

Here are links to my CV and Google Scholar page. 

Some Updates 


My research interests are in direct and inverse problems for PDEs, especially those arising in acoustic and electromagnetic scattering. I have been working on the inverse scattering problem of non-destructive testing for defects in complex media and parameter identification for periodic media. My research employs techniques from a multitude of areas in mathematical analysis, such as Functional analysis, Analysis of PDEs, Numerical and Asymptotic methods. 

This figure is the cover image for Inverse Problems Volume 31 Number 2
Reconstructions of circular cavities in an Anisotropic material via the factorization method.

Research Interests: Direct and Inverse Scattering, Transmission Eigenvalue Problems, Inverse Problems for (Fractional) Diffusion, Qualitative Reconstruction Methods, Electrical Impedance Tomography, Inverse Spectral Problems, Homogenization, and Asymptotic Analysis 

Refereed Research Papers
  • I. Harris and A. Kleefeld "The inverse scattering problem for a conductive boundary condition and transmission eigenvalues". Applicable Analysis, DOI: 10.1080/00036811.2018.1504028  (arXiv:1608.07560)
  • F. Cakoni, I. Harris and S. Moskow "The Imaging of Small Perturbations in an Anisotropic Media".  Computers and Mathematics with Applications Volume 74, Issue 11, 2017 2769-2783 (arXiv:1702.06058)
  • L. Hoeltgen, I. Harris, A. Kleefeld and M. Breuss "Analytic Existence and Uniqueness Results for PDE-Based Image Reconstruction with the Laplacian" Scale Space and Variational Methods in Computer Vision (2017), 66-79. Lecture Notes in Computer Science Volume 10302, Springer
  • I. Harris and S. Rome "Near field imaging of small isotropic and extended anisotropic scatterers".  Applicable Analysis Volume 96, No. 10, 2017 1713-1736 (arXiv:1601.02993)
  • O. Bondarenko I. Harris, and A. Kleefeld "The interior transmission eigenvalue problem for an inhomogeneous media with a conductive boundary". Applicable Analysis Volume 96, No. 1, 2017 2-22 (arXiv:1510.01762)
  • F. Cakoni, H. Haddar, and I. Harris "Homogenization of the transmission eigenvalue problem for periodic media and application to the inverse problem". Inverse Problems and Imaging Volume 9, No. 4, 2015, 1025–1049 (arXiv:1410.3729)
  • F. Cakoni and I. Harris "The factorization method for a defective region in an anisotropic material". Inverse Problems, 31 025002 (2015) (arXiv:1410.3737)
  • I. Harris, F. Cakoni, and J. Sun "Transmission eigenvalues and non-destructive testing of anisotropic magnetic materials with voids". Inverse Problems, 30 035016 (2014) (Preprint
Other Publications: 
  • I. Harris “Parameter identification for complex materials using Transmission Eigenvalues”. Oberwolfach Report, No. 45 (2016) 46-48. Extended Abstract for the workshop: Theory and Numerics of Inverse Scattering Problems
  • I. Harris "Non-Destructive Testing of Anisotropic Materials". The University of Delaware, Ph.D. Thesis (2015)
Papers in Preparation or Submitted: 
  • L. Hoeltgen, A. Kleefeld, I. Harris and M. Breuss "Theoretical Foundation of the Weighted Laplace Inpainting Problem" (Submitted) (arXiv:1801.09068)
  • I. Harris "Detecting an inclusion with a generalized impedance condition from electrostatic data via sampling" (Submitted) (arXiv:1708.03203)
  • I. Harris and W. Rundell "A direct method for reconstructing inclusions and boundary conditions from electrostatic data" (Under Preparation) (arXiv:1704.07479)
  • I. Harris and J. Rezac “Direct sampling algorithms for Spectral Density and Near-Field Acoustic Scattering”. (Under Preparation-Working Title) 
  • I. Harris and A. Kleefeld “Analysis of new direct sampling indicators for Far-field measurements”. (Under Preparation-Working Title) 
Teaching Fall 2018
I am not teaching this Fall Semester!!!