Research Areas

  • Algorithms and Theory of Computation
  • Architecture and Operating Systems
  • Cloud Computing
  • Parallel and Distributed Systems
  • Scientific and High Performance Computing


BA Mathematics -- New College, Sarasota, FL 1973
MS Mathematics -- University of FL, Gainesfile, FL 1980
MS Engineering Sciences -- University of FL 1984
PhD Mathematics University of FL 1986


Gary Howell, “Derivative Error Bounds for Lagrange Interpolation”, Journal
of Approximation Theory 67, 2. pp. 164-173 (1991).

Gary Howell, “Isotope Separation by Oscillatory Flow”, Physics of Fluids
31, 6, (1988).

G. W. Howell, C. T. Fulton, K. Marmol, J. Demmel, and S. Hammarling, “Cache Efficient Bidiagonalization Using BLAS 2.5 Operators”, ACM Transactions on Mathematical Software, May 2008, Vol. 32, 3, pp. 13-46.

 G.W. Howell and N. Diaa, Algorithm 841, “Gaussian Reduction to a Similar Banded Hessenberg Form”, ACM Transactions on Mathematical Software, March 2005, Vol. 31, 1, pp. 166-195.

 Desmond Stephens and Gary Howell, “The Elementary Residual Method”, AMS Contemporary Mathematics, 2001, Vol. 275, pp. 107-116.

 G. A. Geist, G. W. Howell, and D.S. Watkins, “The BR Eigenvalue Algorithm”, SIAM J. on Matrix Matrix Analysis and Applications (SIMAX), July 1999, 20, 4 pp. 1083-1097.

Gary Howell, L.V. Fausett, and D. Fausett, “Quasi-Circular Splines, a Shape Preserving Algorithm”, CVGIP: Graphical Models and Image Processing 55, 2, pp. 89-97, (1993). 

Gary Howell and A. K. Varma, “0-2 Spline Interpolation With Quartic Splines”, Numeric Functional Analysis and Optimization, (1991).

Iterative solution of sparse linear least squares using LU Factorization"G.W. Howell and M. Babouin, to appear in HPC Asia 2018.

LU Preconditioning for Overdetermined Sparse Least Squares Problems G.W. Howell and M. Baboulin, PPAM, 2015.

An Efficient Parallel Solution to the Wigner-Poisson Equation, A.S.Costalanski, C.T.Kelley, G.W.Howell, A.G.Salinger, HPC 2013, Orlando.

"Wide or Tall" and "Sparse Matrix Dense Matrix" Multiplications , HPC 2011, Boston.