Selected papers, and one very old manuscript.

             (For published papers, the version posted here includes final corrections made by the author(s), but not corrections made in proof.)

Some of the work reported here was partially supported by the NSF under grant DMS-1009194. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.

  1. Transmission eigenvalues and thermoacoustic tomography, (With K. Hickmann), published in Inverse Problems, 29 , article id 104016, 2013: journal site
  2. Range conditions for a spherical mean transform. (With M. Agranovsky and P. Kuchment) Inverse Problems and Imaging,3, pp. 373-382, 2009
  3. The spherical mean value operator with centers on a sphere.  (With Rakesh) Inverse Problems, 23, no. 6, pp. S37-S49, 2007.
  4. Inversion of spherical means and the wave equation in even dimension.  (With M. Haltmeier and Rakesh) SIAM J. Appl. Math., vol. 68, no. 3, pp. 392-412, 2007
  5. The range of the spherical mean value operator for functions supported in a ball.  (With Rakesh) Inverse Problems, 22, pp. 923-938, 2006.
  6. Trace identities for solutions of the wave equation with initial data supported in a ball.  (With Rakesh) Math. Meth. Appl. Sci., 18, pp. 1897-1917, 2005.
  7. Determining a function from its mean values over spheres.  (With S. K. Patch and Rakesh) SIAM J. Math. Analysis, 35, pp. 1213-1240, 2004.
  8. Microlocal analysis of the x-ray transform with sources on a curve. (With Ih-Ren Lan and Gunther Uhlmann) pp. 193-218 in Inside Out, Camb. U. Press, 2003.
  9. The attenuated x-ray transform: recent developments. pp. 47-66 in Inside Out, Camb. U. Press, 2003.
  10. The X-ray transform for a non-abelian connection. (With Gunther Uhlmann) Inverse Problems, 17 (2001) , pp. 695-701.
  11. Approximate reconstruction formulae for the cone beam transform I (an unpublished manuscript from 1987).