Josef   Sifuentes

Assistant Professor  

Office: EMAGC 3.614
Phone: (956) 665-2197
Email: josef.sifuentes@utrgv.edu

Professor Josef Sifuentes

Dr. Josef Sifuentes is an applied mathematician who specializes in numerical linear algebra, with an emphasis in Krylov subspace methods and fast integral algorithms.





Selected Publications


  • Josef Sifuentes, Zydrunas Gimbutas, and Leslie Greengard. "Randomized methods for rank-deficient linear systems," Electronic Transactions on Numerical Analysis 44, (February 2015): 177-188.

  • Josef Sifuentes, Mark Embree, and Ronald Morgan. "The stability of GMRES convergence, with application to preconditioning by approximate deflation.," SIAM Journal of Matrix Analysis and Applications 34, no. 3 (July (3rd Quarter/Summer) 2013): 1066-1088.

  • Josef Sifuentes, Mark Embree, Soodholter Kirk, Daniel Szyld, and Fei Xue. "Short-term recurrence Krylov subspace methods for nearly-Hermitian matrices.," SIAM Journal of Matrix Analysis and Applications 33, no. 2 (June 2012): 480-500.

  • Josef Sifuentes. Preconditioned Iterative Methods for Inhomogeneous Acoustic Scattering Applications. May 2010.

  • Josef Sifuentes. "Heavy Metal - Combining Art and Mathematics," Mathematical Science and Research Institute Emissary, October (4th Quarter/Autumn) 2003.

  • Josef Sifuentes, Zydrunas Gimbutas, and Leslie Greengard. "Optimized quadratures for the Sommerfeld representation of acoustic and electromagnetic fields.," .

  • Josef Sifuentes, Gilbert Ymbert, and Mark Embree. "Approximate Murphy-Golub-Wathen preconditioning for saddle point problems.," .

  • Josef Sifuentes, Mrinal Kanti Roychowdhury, and Santanu Chakraborty. "High precision numerical computation of principal points for univariate distributions," .

  • Josef Sifuentes and Shari Moskow. "Preconditioning Methods for Thin Scatter- ing Structures Based on Asymptotic Results," SIAM Journal on Scientific Computing .



Selected Presentations


  • Josef Sifuentes, Gilbert Ymbert, and Mark Embree. "Approximate Murphy-Golub-Wathen Preconditioning For Saddle Point Problems.," Householder Symposium on Numerical Linear Algebra, Blacksburg, VA (June 2017)

  • Josef Sifuentes. " Approximate Murphy-Golub-Wathen Preconditioning For Saddle Point Problems," Visiting Scholars Workshop, SMSS, Edinburg, Texas (November 2016)

  • Jean Linhart, Adam Larios, and Josef Sifuentes. "Programming and Problem Solving: Getting Started on the Right Foot," MAA Mathfest, MAA, Columbus Ohio (August 2016)

  • Josef Sifuentes, Zydrunas Gimbutas, and Leslie Greengard. "Randomized Methods for Rank-Deficient Linear Systems," SIAM Annual Meeting, SIAM, Boston, MA (July 2016)

  • Josef Sifuentes. "Krylov Subspaces: Results and Open Problems ," Pure Math Seminar in UTRGV SMSS, SMSS, Edinburg, Texas (April 2016)

  • Josef Sifuentes. "Approximate deflation preconditioning for iterative methods," Visiting Scholars Workshop, SMSS, Edinburg, Texas (November 2015)

  • Josef Sifuentes. "Approximate Murphy-Golub-Wathen Preconditioning For Saddle Point Problems," Applied Math Seminar of the SMSS, SMSS, Edinburg, Texas (October 2015)

  • Josef Sifuentes. "An integral equation approach to modeling acoustic wave scatterings," PDE and Imaging Seminar, SMSS, Edinburg, TX (October 2015)

  • Josef Sifuentes, Zydrunas Gimbutas, and Leslie Greengard. "Randomized Methods for Rank-Deficient Linear Systems," Householder Symposium on Numerical Linear Algebra, Spa, Belgium (June 2014)

  • Josef Sifuentes, Gilbert Ymbert, and Mark Embree. "Approximate Murphy-Golub-Wathen Preconditioning For Saddle Point Problems.," Workshop on Numerical Linear Algebra and Optimization, University of British Columbia, Vancouver, Canada (August 2013)

Current Courses

MECE 3449 01 - Mech Engineering Analysis I:
Syllabus
Course Evaluations
Textbooks
MATH 3343 90L - Intro to Math Software:
Syllabus
Course Evaluations
Textbooks
MECE 3449 02 - Mech Engineering Analysis I:
Syllabus
Course Evaluations
Textbooks
MATH 3343 01 - Intro to Math Software:
Syllabus
Course Evaluations
Textbooks

Previous Courses