The geometry of minimal shape-preserving projections, with B.L. Chalmers, Computers Math. Applic. 30(1995), No. 3-6, 277-281.
Codimension one minimal projections onto the quadratics: J. Approx. Theory, 85(1996), 27-42.
A farthest-point characterization of the relative Chebyshev center, with R. Huotari, Bull. Austral. Math. Soc., 54(1996), 27-33.
Minimal
shape-preserving projections onto
,
with B.L. Chalmers, Numer. Funct. Analysis. and Optimiz., 18(1997),
507-520.
The Bernstein operator is the closest positive operator to a projection, with B.L. Chalmers, D. Leviatan, Approximation Theory IX, Volume 1: Theoretical Aspects, Charles K. Chui and Larry L. Schumaker (eds.), Vanderbilt University Press, Nashville, TN, 1998.
Existence of shape preserving A-action operators, with B.L. Chalmers, Rocky Mountain J. Math., 28(1998), No. 3, 813-833.
Optimal interpolating spaces preserving shape, with B.L. Chalmers, D. Leviatan, J. Approx. Theory, 98(1999), 354-373.
On j-convex preserving interpolation operators, J. Approx. Theory, 104(2000), 77-89.
Constrained optimal location, Numer. Funct. Analysis. and Optimiz., 22(1&2)(2001), 69-78.
Optimal location with convex contraints , Approximation Theory X, Abstract and Classical Analysis, (C.Chui, L. Schumaker, J. Stoeckler eds.), Vanderbilt Press (2002), 239-246.
On a constrained optimal location algorithm J. of Computational Analysis and Applications, 5, No. 1, (2003)
Simplicial cones and the existence of shape-preservation cyclic operators, Linear Algebra and its Applications, 375 (2003), 157-170.
Codimension-one minimal projections onto the polynomials of degree $\leq n-1$, J. Approx. Theory, 127 (2004), 198-206.
A Note on the Existence of Shape-Preserving Projections, Rocky Mountain J. Math., to appear.
A characterization and equations for minimal shape-preserving projections, submitted.
Minimal multi-convex projections, submitted.
Minimal shape-preserving projections onto $\Pi_n$: Generalizations and Extensions, submitted.
Non-existence of monotonically complemented subspace of C[a,b], submitted.
A Lower Bound of the Strongly Unique Minimal Projection Constant of $l_{\infty}^n$, submitted.
Shape-preserving projections in tensor product spaces, work in progress.