## Recent papers:

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Interative schemes for non-symmetric and indefinite elliptic boundary value problems (with Z. Leyk and J. E. Pasciak). Math. Comp. 60 (1993) 1-22

Interpolation between Sobolev spaces in Lipschitz domains with an application to multigrid theory. Math. Comp. 64 (1995) 1359--1365

Some estimates for a weighted L^2 projection (with J. Xu). Math. Comp. 56 (1991) 463-476

A least-squares approach based on a discrete minus one inner product for first order systems (with R. D. Lazarov and J. E. Pasciak). Math. Comp. 66 (1997) pp.935-955

Least-squares methods for Stokes equations based on a discrete minus one inner product (with J. E. Pasciak). Jour. Comput. and Appl. Math. 74 (1996) pp. 155--173

Iterative techniques for time dependent Stokes problems (with J. E. Pasciak). The International Journal on Computers and Mathematics with Applications 33 (1997) pp. 13-30

Analysis of the inexact Uzawa algorithm for saddle point problems (with J. E. Pasciak and A. T. Vassilev). SIAM Numer. Anal. 34 (1997) pp. 1072-1092

Uniform convergence estimates for multigrid V-cycle algorithms with less than full elliptic regularity (with J. E. Pasciak). Domain Decomposition methods in science and Engineering, A. Quarteroni, J. Periaux, Y. A. Kuznetsov and O. B. Widlund, Eds, Contemporary Mathematics Series \#157 Am. Math. Soc. (1994) 17--26

Uniform convergence of multigrid V-cycle iterations for indefinite and nonsymmetric problems (with D.Y. Kwak and J.E. Pasciak). SIAM J. Num. Anal. 31 (1994) 1746--1763

The analysis of multigrid algorithms for cell centered finite difference methods (with R. E. Ewing, J. E. Pasciak and J. Shen). Adv. in Comp. Math. 5 (1996) pp.15-29

New estimates for multilevel algorithms including the V-cycle (with J. E. Pasciak) Math. Comp. 60 (1993) 447-471

Analysis of non-overlapping domain decomposition algorithms with inexact solves (with J. E. Pasciak and A. T. Vassilev). Math. Comp. 67 (1998) pp. 1-19

A finite element method for interface problems in domains with smooth boundaries and interfaces (with J. T. King). Advances in Comp. Math. 6 (1996) pp.109-138

A subspace preconditioning algorithm for eigenvalue/eigenvector computation (with A. V. Knyazev and J. E. Pasciak).Advances in Comp. Math. 6 (1996) pp.159-189

Multigrid methods for the biharmonic problem discretized by conforming C^1 finite elements on nonnested meshes (with X. Zhang).Numer. Funct. Anal. and Optimiz. 1 (1995) pp. 835--846

The Analysis of multigrid algorithms for pseudo-differential operators of order minus one (with Z. Leyk and J. E. Pasciak). Math. Comp. 63 (1994) pp. 461-478

Two-Level preconditioners for 2m'th order elliptic finite element problems (with J. E. Pasciak and X. Zhang). East-West J. Numer. Math. 4 (1996) pp. 99-120

A negative norm least squares method for Reissner-Mindlin plates (with T. Sun). Math. Comp. 67 (1998) pp.901-916

A locking -free finite element method for Naghdi shells (with T. Sun).Journal of Computational and Applied Mathematics 89 (1997) pp.119-133

Uniform Convergence of the Multigrid V-Cycle for an Anisotropic Problem (with X. Zhang).Math. Comp. 70 (2001) pp. 453-470

Least-Squares for Second Order Elliptic Problems (with R. D. Lazarov and J. E. Pasciak). Comput. Methods in Appl. Mech. Engrg. 152 (1998) pp. 195-210

Inexact Uzawa Algorithms for Nonsymmetric Saddle Point Problems (with J. E. Pasciak and A. T. Vassilev). Math. Comp. 69 (2000) pp.667-689

Computational scales of Sobolev norms with application to preconditioning (with J. E. Pasciak and P. S. Vassilevski). Math. Comp. 69 (2000) pp. 463-480

On the Stability of the $L^2$ projection in $H^1$ (with J. E. Pasciak and O. Steinbach). Math. Comp. 71 (2002) pp. 147-156

Least-squares methods for linear elasticity based on discrete minus one inner product (with R. D. Lazarov and J. E. Pasciak) Comp. Meth. Appl. Mech. Engrg. 152 (2001) pp. 520-543

Using finite element tools in proving shift theorems for elliptic boundary value problems(with J. E. Pasciak, and C. Bacuta)
Journal of Computational Linear Algebra.

New interpolation results and applications to finite element methods for elliptic boundary value problems (with C. Bacuta and J. E. Pasciak).East-West J. Numer. Math. 3 (2001) 179-198.

A proof of the inf-sup condition for the Stokes equations on Lipschitz domains. M^3 AS 13 (2003) pp.361-371

Regularity estimates for elliptic boundary value problems in Besov spaces (with C. Bacuta and J. Xu). Math. Comp.72 (2003) pp.1577-1595

Shift theorems for the biharmonic Dirichlet problem (with C. Bacuta and J. E. Pasciak). (preprint)

Regularity estimates for elliptic boundary value problems with smooth data on polygonal domains (with C. Bacuta and J. Xu). (preprint)

A new approximation technique for div-curl systems (with J. E. Pasciak). Math. Comp. 73 (2004) pp.1739-1762

Regularity estimates for solutions of the equations of linear elasticity in convex plane polygonal domains (with C. Bacuta). ZAMP(to appear)

The approximation of the Maxwell eigenvalue problem using a least squares method (with T. Kolev and J. E. Pasciak). Math. Comp.74 (2005) pp.1575-1598

A least-squares method for the time-harmonic Maxwell equations (with T. Kolev and J. E. Pasciak). J. Numer. Math. 13,(2005) pp.237-320

Analysis of a finite PML approximation for the three dimensional time-harmonic Maxwell and acoustic scattering problems (with J. E. Pasciak). Math. Comp.(to appear)

A note on the existence and uniqueness of solutions of frequency domain elastic wave problems: { \it{a priori}} estimates in $\bH^1$. (with J. E. Pasciak). Math. Comp.(to appear)

Analysis of a finite PML approximation for the three dimensional elastic wave scattering problem problem (with J. E. Pasciak and D.Trenev). (to appear)

Analysis of a finite element PML approximation for the three dimensional time harmonic Maxwell scattering problem problem (with J. E. Pasciak). (to appear)