Abstract
Consideration is given to problems of linear best approximation using a variant of the usuall p norms referred to ask-majorl p norms, for the cases when 1<p<∞. The underlying problem is the minimization of a piecewise smooth function. Best approximations are characterized, and a descent algorithm is developed.
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References
A. Alzameh and J.M. Wolfe, Best multipoint locall p approximation, J. Approx. Theory 62 (1990) 243–256.
R.H. Bartels, A.R. Conn and J.W. Sinclair, Minimization techniques for piecewise differentiable functions: thel 1 solution to an overdetermined linear system, SIAM J. Numer. Anal. 15 (1978) 224–241.
J. Bergh and J. Löftström,Interpolation Spaces, An Introduction, (Springer, Berlin, 1976).
M. Fang, The Chebyshev theory of a variation ofl p (1<p<∞) approximation, J. Approx. Theory 62 (1990) 94–109.
R.A. Horn and C.R. Johnston,Topics in Matrix Analysis, (Cambridge University Press, Cambridge, 1991).
E. Lapidot and J.T. Lewis, Best approximation using a peak norm, J. Approx. Theory 67 (1991) 174–186.
C. Li and G.A. Watson, On approximation using a peak norm, J. Approx. Theory 77 (1994) 266–275.
Z. Ma and Y.-G. Shi, A variation of rationalL 1 approximation, J. Approx. Theory 62 (1990) 262–273.
J.K. Merikoski and G. De Oliveira, Onk-major norms andk-minor antinorms, Lin. Alg. Appl. 176 (1992) 197–209.
A. Pinkus,On L 1-approximation (Cambridge University Press, Cambridge, 1989).
A. Pinkus and O. Shisha, Variations on the Chebyshev andL q theories of best approximation, J. Approx. Theory 35 (1982) 148–168.
R.T. Rockafellar,Convex Analysis (Princeton University Press, Princeton, NJ, 1970).
Y.-G. Shi, The Chebyshev theory of a variation ofL approximation, J. Approx. Theory 67 (1991) 239–251.
G.A. Watson, Linear best approximation using a class of polyhedral norms, Numer. Algor. 2 (1992) 321–336.
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Communicated by C. Brezinski
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Watson, G.A. Linear best approximation using a class ofk-majorl p norms. Numer Algor 8, 135–146 (1994). https://doi.org/10.1007/BF02145701
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DOI: https://doi.org/10.1007/BF02145701