A TEST PROBLEM GENERATOR FOR DISCRETE LINEAR L₁ APPROXIMATION PROBLEMSHOFFMAN KL; SHIER DR.1980; A.C.M. TRANS. MATH. SOFTWARE; USA; DA. 1980; VOL. 6; NO 4; PP. 587-593; BIBL. 10 REF.Article

AN ALGORITHM FOR A RESTRICTED DISCRETE APPROXIMATION PROBLEM IN THE L₁ NORM.ARMSTRONG RD; HULTZ JW.1977; S.I.A.M. J. NUMER. ANAL.; U.S.A.; DA. 1977; VOL. 14; NO 3; PP. 555-565; BIBL. 14 REF.Article

APPROXIMATION OF A FUNCTION BY A SINGULAR INTEGRAL IN L₁-NORMASHUTOSH PATHAK.1979; INDIAN J. PURE APPL. MATH.; NLD; DA. 1979; VOL. 10; NO 4; PP. 389-393; BIBL. 1 REF.Article

L₁-APPROXIMATION TO ZERO.FROMM J.1976; MATH. Z.; DTSCH.; DA. 1976; VOL. 151; NO 1; PP. 31-33; BIBL. 4 REF.Article

ONE-SIDED L¹ APPROXIMATION BY SPLINESWITH FIXED KNOTS.PINKUS A.1976; J. APPROXIM. THEORY; U.S.A.; DA. 1976; VOL. 18; NO 2; PP. 130-135; BIBL. 8 REF.Article

On a sufficient condition for best L¹-approximationPEHERSTORFER, F.SIAM journal on mathematical analysis. 1984, Vol 15, Num 6, pp 1188-1195, issn 0036-1410Article

Best harmonic L¹ approximation to subharmonic functionsGOLDSTEIN, M; HAUSSMANN, W; JETTER, K et al.Journal of the London Mathematical Society. 1984, Vol 30, Num 2, pp 257-264, issn 0024-6107Article

Approximation by generalized splinesNÜRNBERGER, G; SCHUMAKER, L. L; SOMMER, M et al.Journal of mathematical analysis and applications. 1985, Vol 108, Num 2, pp 466-494, issn 0022-247XArticle

Best L₁-approximation of bounded, approximately continuous functions on [0,1] by nondecreasing functionsDARST, R. B; HUOTARI, R.Journal of approximation theory. 1985, Vol 43, Num 2, pp 178-189, issn 0021-9045Article

On simultaneous best L₁ approximations in C[-1,1]YING GUANG SHI.Journal of approximation theory. 1984, Vol 40, Num 3, pp 285-291, issn 0021-9045Article

Best L₁-approximationSTRAUSS, H.Journal of approximation theory. 1984, Vol 41, Num 4, pp 297-308, issn 0021-9045Article

EINDEUTIGKEIT IN DER L₁-APPROXIMATION = UNICITE DANS L'APPROXIMATION L₁STRAUSS H.1981; MATH. Z.; ISSN 0025-5874; DEU; DA. 1981; VOL. 176; NO 1; PP. 63-74; BIBL. 17 REF.Article

CHEBYSHEV SUBSPACES OF L¹ WITH LINEAR METRIC PROJECTIONMORRIS PD.1980; J. APPROX. THEORY; ISSN 0021-9045; USA; DA. 1980; VOL. 29; NO 3; PP. 231-234; BIBL. 7 REF.Article

L₁-APPROXIMATION VERALLGEMEINERTER KONVEXER FUNKTIONEN DURCH SPLINES MIT FREIEN KNOTEN = APPROXIMATION L₁ DE FONCTIONS CONVEXES GENERALES AVEC NOEUDS LIBRESJETTER K.1978; MATH. Z.; DEU; DA. 1978; VOL. 164; NO 1; PP. 53-66; BIBL. 28 REF.Article

BEST SIMULTANEOUS L₁ APPROXIMATIONSHOLLAND ASB; MCCABE JH; PHILLIPS GM et al.1978; J. APPROXIM. THEORY; USA; DA. 1978; VOL. 24; NO 4; PP. 361-365; BIBL. 7 REF.Article

MOMENT THEORY FOR WEAK CHEBYSHEV SYSTEMS WITH APPLICATIONS TO MONOSPLINES, QUADRATURE FORMULAE AND BEST ONE-SIDED L¹-APPROXIMATION BY SPLINE FUNCTIONS WITH FIXED KNOTS.MICCHELLI CA; PINKUS A.1977; S.I.A.M. J. MATH. ANAL.; U.S.A.; DA. 1977; VOL. 8; NO 2; PP. 206-230; BIBL. 14 REF.Article

UNIFORM L¹ BEHAVIOR FOR AN INTEGRODIFFERENTIAL EQUATION WITH PARAMETER.HANNSGEN KB.1977; S.I.A.M. J. MATH. ANAL.; U.S.A.; DA. 1977; VOL. 8; NO 4; PP. 626-639; BIBL. 10 REF.Article

ALGORITHMS FOR RESTRICTED LEAST ABSOLUTE VALUE ESTIMATIONBARRODALE I; ROBERTS FDK.1977; COMMUNIC. STATIST., SIMUL. COMPUT.; USA; DA. 1977; VOL. 6; NO 4; PP. 353-363; BIBL. 14 REF.Article

BEST L¹ APPROXIMATION BY WEAK CHEBYSHEV SYSTEMS AND THE UNIQUENESS OF INTERPOLATING PERFECT SPLINES.MICCHELLI CA.1977; J. APPROXIM. THEORY; U.S.A.; DA. 1977; VOL. 19; NO 1; PP. 1-14; BIBL. 19 REF.Article

NONLINEAR L₁ APPROXIMATION OF SMOOTH FUNCTIONS.WOLFE JM.1976; J. APPROXIM. THEORY; U.S.A.; DA. 1976; VOL. 17; NO 2; PP. 166-176; BIBL. 5 REF.Article

BEST SIMULTANEOUS APPROXIMATION IN THE L₁ AND L₂ NORMS.PHILLIPS GM; SAHNEY BN.1976; IN: THEOR. APPROXIMATION APPL. CONF. PROC.; CALGARY; 1975; NEW YORK; ACADEMIC PRESS; DA. 1976; PP. 213-219; BIBL. 8 REF.Conference Paper

A NOTE ON L¹-CONVERGENCE OF FOURIER SERIES WITH DELTA -QUASI-MONOTONE COEFFICIENTSAHMAD ZU; ZAINI SZA.1981; COMMUN. FAC. SCI. UNIV. ANKARA, SER. A1: MATH.; ISSN 0251-0871; TUR; DA. 1981; VOL. 30; NO 1; 5 P.; BIBL. 7 REF.Serial Issue

BEST MEAN APPROXIMATION BY SPLINES SATISFYING GENERALIZED CONVEXITY CONSTRAINTSPENCE DD.1980; J. APPROX. THEORY; ISSN 0021-9045; USA; DA. 1980; VOL. 28; NO 4; PP. 333-348; BIBL. 13 REF.Article

ON THE INVARIANCE OF THE INTERPOLATION POINTS OF THE DISCRETE I₁-APPROXIMATIONASCHER U.1978; J. APPROXIM. THEORY; USA; DA. 1978; VOL. 24; NO 1; PP. 83-91; BIBL. 8 REF.Article

METHODOLOGY AND ANALYSIS FOR COMPARING DISCRETE LINEAR L₁ APPROXIMATION CODESGILSINN J; HOFFMAN K; JACKSON RHF et al.1977; COMMUNIC. STATIST., SIMUL. COMPUT.; USA; DA. 1977; VOL. 6; NO 4; PP. 399-413; BIBL. 8 REF.Article