Authors: Chu, M.¹ chu@math.ncsu.edu, del Buono, N.² delbuono@dm.uniba.it, Lopez, L.² lopezl@dm.uniba.it, Politi, T.³ politi@poliba.it

Superior Title: SIAM Journal on Matrix Analysis & Applications. 2005, Vol. 27 Issue 1, p46. 15p.

Subject Terms: *APPROXIMATION theory, *DATA analysis, *SPHERICAL functions, *UNITS of measurement, *MATRICES (Mathematics), *CIRCLE, *MODEL validation, *SOLID geometry, *ABSTRACT algebra