Books:

1. Weighted Polynomial Approximation, World Scientific, Singapore, 1996.
2. Mathematical Aspects of Neural Networks, Special Issue of Advances in Computational Mathematics, {\bf 5} (1996) (With C. A. Micchelli).
3. Fundamentals of Approximation Theory, Narosa Publishing Co., Delhi,  2000. (With D. V. Pai)
4. Wavelet Analysis and Applications, Proceedings of the international workshop in Delhi, 1999, in preparation (With P. K. Jain, M. Krishnan, J. Prestin, and D. Singh).
5. Frontiers in interpolation and approximation, Dedicated to the  memory of Ambikeshwar Sharma, Chapman and Hall/CRC, Boca Raton, Florida, 2006 (With N. K. Govil, R. N. Mohapatra, Z. Nashed, and J. Szabados).
6. Special volumes of Journal of Approximation Theory  in memory of George G. Lorentz, Volumes 158, 159 (two issues each), Elsevier, 2009 (With C. K. Chui)
7. Local analysis of spectral and scattered data, In preparation. Contract with Atlantis (Springer Verlag)
    

  
 Articles:
 
 

1. Weighted polynomial approximation in rearrangement invariant Banach function spaces on the whole real line; Indian J. Math., {\bf 22} (3)(1980), 209-224 (with G. Freud).
2. $K$-functionals and moduli of continuity in weighted polynomial approximation; Arkiv for Mat., {\bf 21} (1983), 145-161 (with G. Freud).
3. Weighted analogues of Nikolskii-type inequalities and their applications; in Proc. Conference on Harmonic Analysis in Honor of A. Zygmund (Becker, et al., eds.), Vol. II (1983), Wadsworth International: Belmont, 783-801.
4. Weighted polynomial approximation of entire functions, I; J. of Approximation Theo., {\bf 35} (1982), 203-213.
5. Weighted polynomial approximation of entire functions, II; J. of Approximation \break Theo., {\bf 33} (1981), 59-68.
6. Comonotone approximation by splines of piecewise monotone functions: J. of Approximation Theo. {\bf 35} (1982) 364-369 (with D. Leviatan).
7. The rate of monotone spline approximation in the $L_p$-norm; SIAM J. of Math. Anal., {\bf 13}(5) 1982, 866-874 (with D. Leviatan).
8. On a problem of G. Freud; J. of Math, Anal. and Appl., {\bf 96} (1983), 395-404.
9. On the domain of convergence of expansions in polynomials orthogonal with respect to general weight functions on the whole real line; Acta. Math. Acad. Sci. Hungar., {\bf 44}(3-4) (1984), 223-227.
10. Extremal problems associated with polynomials with exponential weights; Trans. Amer. Math. Soc., {\bf 285} (1984), 223-234 (with E.B. Saff).
11. Extremal problems for polynomials with Laguerre weights; in Approximation Theory, IV; College Station Texas, 1983, (Chui, et. al. eds.), Academic Press, 1983, 619-624 (with E.B. Saff).
12. Polynomials with Laguerre weights in $L_p$; in Proc. Conf. Rational approximation and interpolation, Tampa, Florida, 1983, (Graves-Morris, et. al. eds.) 511-523 (with E.B. Saff).
13. On the smoothness of Fourier transform; in the Proc. International Symposium on Interpolation spaces, Lund. Sweden, 1983 (Cwickel, Peetre, eds.), Lecture Notes, 1070, Springer Verlag, Berlin, 1984, 202-207.
14. Trace theorems for caloric functions; International Journal of Math. and Mathematical Sciences, B(1) (1985), 29-35.
15. Extensions of Dirichlet-Jordan convergence criterion to a general class of orthogonal polynomial expansions; J. of Approx. Theo., {\bf 42} (1984), 138-148.
16. Where does the sup norm of a weighted polynomial live? (A Generalization of incomplete polynomials); Constructive Approximation, {\bf 1} (1985), 71-91 (with E.B. Saff).
17. Weighted polynomials on finite and infinite intervals; A unified approach; Bulletin American Mathematical Society {\bf 11} (1984), 351-354 (with E.B. Saff).
18. Weighted polynomial approximation; J. of Approx. Theo., {\bf 46} (1986), 100-110 (invited survey paper).
19. A Weierstrass-type theorem for certain weighted polynomials; in Approximation Theory and Applications (S.P. Singh ed.), Pitman, Boston, 1985, 115-123 (with E.B. Saff).
20. A quantitative Dirichlet-Jordan test for orthogonal polynomial expansions; SIAM J. of Math., Anal., {\bf 19} (1988), 484-492.
21. Where does the $L_p$-norm of weighted polynomial live?, Trans. Amer. Math. Soc., {\bf 303} (1987), 109-124, Errata: {\bf 308} (1988), 431. (with E.B. Saff).
22. Freud's conjecture for exponential weights, Bull. Amer. Math. Soc., {\bf 15} (1986), 217-221 (with D.S. Lubinsky and E.B. Saff).
23. A proof of Freud's conjecture for exponential weights, Const. Approx. {\bf 4} (1988), 65-83. (With D.S. Lubinsky and E.B. Saff).
24. A weighted transfinite diameter, in Approximation Theory V (Chui et. al. eds.), Academic Press, 1986, 479-481.
25. A rate of convergence theorem for expansions in Freud polynomials, J. Approx. Theo. {\bf 55} (1988), 150-171.
26. Some Discrepancy theorems; in ``Approximation Theory, Tampa" (E. B. Saff ed.) Vol. 1287, Lecture Notes in Mathematics, Springer Verlag, Berlin, 1987, 117-131.
27. Weighted analogue of capacity, transfinite diameter and Chebyshev constant; Constr. Approx., {\bf 8} (1991), 105-124. (with E.B. Saff)
28. The distribution of zeros of asymptotically extremal polynomials; J. Approx. Theo. {\bf 65} (1991), 279--300 (with E. B.Saff).
29. The convergence of Fourier series and a $K$-functional; J. Math. Anal. Appl., {\bf 154} (1991), 134-141.
30. Approximation in certain intermediate spaces; J. Approx. Theory, {\bf 62} (1990), 110-132.
31. On the distribution of zeros of polynomials orthogonal on the unit circle; J. Approx. Theory, {\bf 63} (1990), 30-38. (with E.B. Saff).
32. Bounds for certain Freud polynomials; J. Approx. Theory, {\bf 63} (1990), 238-254.
33. The asymptotic $n$-widths in weighted approximation of a class of entire functions; in Approximation Theory VI, (Chui et al eds.), Academic Press, 1989, 429-432. (With C.A. Micchelli.)
34. Hermite interpolation at the zeros of Freud polynomials; Acta Math. Hung., {\bf 60} (1992), 225-240 (With Y. Xu).
35. The rate of convergence of a Hermite interpolation process; in Approximation Theory VI, (Chui et al eds.), Academic Press, 1989, 433-436. (With Y. Xu)
36. A general study of maximal robust stability regions; Circuits, Systems, and Signal Processing, {\bf 10} (1991), 15-30 (With C.K. Chui).
37. The mean convergence of expansions in Freud-type orthogonal polynomials; SIAM J. Math. Anal., {\bf 22} (1991), 847-855 (With Y. Xu).
38. On multivariate robust stability; SIAM J. Control and Optimization, {\bf 30} (1992), 1190-1199 (With C.K. Chui).
39. General Markov-Bernstein and Nikolskii-type inequalities; Approximation Theory and its Applications, {\bf 6:4} (1990), 107--117.
40. Finite-infinite range inequalities in the complex plane; Int. J. Math. and Math. Sci., {\bf 14} (1991), 625-638.
41. Weighted polynomials, radial basis functions and potentials in locally compact spaces; Num. Funct. Anal. and Optimization, {\bf 11} (9\& 10), 1990-91, 987--1017.
42. A general discrepancy theorem; Arkiv f\"or Mathematik, {\bf 31} (1993), 219-246 (With H.-P. Blatt).
43. Detection of singularities in a piecewise analytic function; Mathematics of Computation, {\bf 59} (1992), 533-540 (With R. Grothmann).
44. On trigonometric wavelets; Constr. Approx., {\bf 9} (1993), 167-190 (With C.K. Chui).
45. Approximation by superposition of a sigmoidal function and radial basis functions; Advances in Applied Mathematics, {\bf 13} (1992), 350-373 (With C.A. Micchelli).
46. Weighted approximation of entire functions on unbounded subsets of the complex domain; Bull. Canadian Math. Soc., {\bf 36} (1993), 303-313.
47. Approximation properties of a multilayerd feedforward artificial neural network; Advances in Computational Mathematics, {\bf 1} (1993), 61-80.
48. Neural networks for localized approximation; Mathematics of Computation, {\bf 63} (1994), 607-623 (With C. K. Chui and X. Li).
49. Neural networks for localized approximation of real functions; In ``Neural Networks for Signal Processing III'', (C.A. Kamm et. al. eds.), IEEE, New York, 1993, 190-196.
50. Dimension-independent bounds on approximation by neural networks; IBM J. of Research and Development,{\bf 38} (1994), 277-284 (With C. A. Micchelli).
51. How to choose an activation function; in ``Neural Information Processing Systems, 6'', (J. D. Cowan, G. Tesauro, J. Alspector Eds.), Morgan Kaufmann Publishers, San Fransisco, 1993, pp. 319-326 (With C. A. Micchelli).
52. A discrepancy theorem concerning polynomials of best approximation in $L^p_w[-1,1]$; Monatshafte Mathematik, {\bf 120} (1995), 91-103. (With H.-P. Blatt).
53. Approximation of real functions using neural networks; in ``Proc. of Int. Conf. on Computational Mathematics, New Delhi, India, 1993'', (C. A. Micchelli ed.), World Scientific, 1994, pp. 267-278.
54. Degree of approximation by neural and translation networks with a single hidden layer, Advances in Applied Mathematics, {\bf 16} (1995), 151-183. (With C. A. Micchelli).
55. Neural networks for optimal approximation of smooth and analytic functions; Neural Computation, {\bf 8} (1996), 164-177.
56. Versatile Gaussian networks; Proceedings of IEEE Workshop on Nonlinear Image and Signal Processing, (I. Pitas Editor), Halkidiki, Greece, June, 1995, IEEE, pp.70-73.
57. Some discrepancy theorems in the theory of weighted polynomial approximation; Journal of Mathematical Analysis and Applications, {\bf 219} (1998), 312--330 (With H.--P. Blatt).
58. Limitations of the approximation capabilities of a neural network with a single hidden layer, Advances in Computational Mathematics, {\bf 5} (1996), 233-243. (With C. K. Chui and X. Li).
59. On smooth activation functions; in ``Mathematics of Neural Networks, Models, Algorithms, and Applications'', (S. W. Ellacott, J. C. Mason, and I. J. Anderson Eds.), Kluwer Academic Publishers, 1997, pp. 275--279.
60. Neural networks for function approximation; in ``Neural networks for signal processing, V'', (F. Girosi, J. Makhoul, E. Manolakos, E. Wilson Eds.), IEEE, New York, 1995, pp.21-29. (With L. Khachikyan).
61. Neural networks for functional approximation and system identification; Neural Computation, {\bf 9} (1997), 143--159. (With N. Hahm)
62. System identification using neural networks; in ``Neural networks for signal processing, VI'', (S. Usui, Y. Tohkura, S. Katagiri, and E. Wilson Eds.), pp. 82--88, IEEE, New York, 1996, (With N. Hahm).
63. Bounded quasi-interpolatory polynomial operators; Journal of Approximation Theory, {\bf 96} (1999), 67--85.  (With J. Prestin).
64. On Marcinkiewicz-Zygmund-Type Inequalities;  in ``Approximation theory: in memory of A. K. Varma'', (N. K. Govil, R. N. Mohapatra, Z. Nashed, A. Sharma, and J. Szabados Eds.), Marcel Dekker 1998, pp.389--404. (With J. Prestin)
65. On a choice of sampling nodes for optimal approximation of smooth functions by generalized translation networks; in Artificial Neural Networks, Conference Publication No. 440 (IEE), 1997, pp. 210-215. (With J. Prestin)
66. Neural beam-steering and direction finding; in Neural Networks in Engineering Systems, (A. B. Bulsari and S. Kallio Eds.), Royal Institute of Technology, Stockholm, 1997, pp. 269-272. (With H. Southall)
67. Approximation of smooth functions by neural networks; {\it Invited survey,\/} in ``Dealing with complexity: A neural network approach'', (K. Warwick et. al. eds), ``Perspectives in Neural Computing'', Springer Verlag, London, 1998, pp.189--204.
68. Polynomial frames for the detection of singularities; in  ``Wavelet Analysis and Multiresolution Methods'' (Ed. Tian-Xiao He), Lecture Notes in Pure and Applied Mathematics, Vol. 212, Marcel Decker, 2000, 273--298. (With J. Prestin).
69. On a sequence of fast decreasing polynomials; in ``Applications and computation of orthogonal polynomials'' (W. Gautschi, G. Golub, M. Opfer Eds.), Internat. Ser. Numer. Math. Vol. 131, Birkhäuser, Basel, 1999, 165-178. (With J. Prestin).
70. On the detection of singularities of a periodic function; Advances in Computational Mathematics, {\bf 12} (2000), 95--131  (With J. Prestin).
71. Spherical Marcinkiewicz-Zygmund inequalities and positive quadrature. Math. Comp. {\bf 70} (2001), no. 235, 1113--1130.  (With F. J. Narcowich and J. D. Ward). (Corrigendum: Math. Comp. {\bf 71} (2001), 453--454.) (In some publications, referred to as:
    Quadrature formulas on spheres using scattered data)
72. Approximation properties of zonal function networks using scattered data on the sphere; Advances in Computational Mathematics, {\bf 11} (1999), 121--137. (With F. J. Narcowich and J. D. Ward)
73. Representing and analyzing scattered data on the sphere;  in ``Multivariate approximation and applications'' (A. Pinkus, D. Leviatan, N. Dyn, and D. Levin Eds.), Cambridge University Press, Cambridge, pp. 44--72.  (With F. J. Narcowich and J. D. Ward).
74. On a build-up polynomial frame for the detection of singularities; in ``Self-Similar Systems'' (V. B. Priezzhev and V. P. Spiridonov Eds.), Joint Institute for Nuclear Research, Dubna, Russia, 1999, pp. 98--109.  (With J. Prestin).
75. Quasi-interpolation in shift invariant spaces; J. Math. Anal. and Appl. {\bf 251} (2000), 356-363.  (With F. J. Narcowich and J. D. Ward).
76.  Polynomial frames on the sphere; Adv. Comput. Math. 13 (2000), no. 4, 387--403.  (With F. J. Narcowich, J. Prestin, and J. D. Ward). 
77. Zonal function network frames on the sphere;  Neural Networks, {\bf 16}(2) (2003), 183--203 (With F. J. Narcowich and J. D. Ward).
78. Approximation theory and neural networks; in  "Wavelet Analysis and Applications, Proceedings of the international workshop in Delhi, 1999" (P. K. Jain, M. Krishnan, H. N. Mhaskar J. Prestin, and D. Singh Eds.), Narosa Publishing, New Delhi, India, 2001, 247--289.
79. Neural network frames on the sphere; in ``Neural networks for signal processing, X, (B. Widrow, L. Guan, K. Paliwa, T. Adall, J. Larsen, E. Wilson, and S. Douglas Eds.), IEEE, New York, 2000, pp. 175--184. (With F. J. Narcowich and J. D. Ward).
80. Approximation with Interpolatory Constraints; Proc. Amer. Math. Soc. {\bf 130} (2002), no. 5, 1355--1364 (With F. J. Narcowich, N. Sivakumar, and J. D. Ward).
81. A local discrepancy theorem; Indiagationes Math., {\bf 12}(1), (2001), 23--39. (With V. V. Andrievskii and  H.-P. Blatt).
82. On the representation of band limited functions using finitely many bits;  Journal of Complexity, {\bf 18} (2002), no. 2, 449--478.
83. On the degree of approximation in multivariate weighted approximation;  in ``Advanced Problems in Constructive Approximation'' (Proceedings of the IDOMAT 2001 conference) (M.D. Buhmann  and D.H. Mache  Eds.), ISNM {\bf 142}, Birkh\"auser, Basel, 2002, pp.129--141.
84. On the representation of band-dominant functions on the sphere
    using finitely many bits;  Advances in Computational Mathematics, {\bf 21} (2004), 127--146. (With F. J. Narcowich and J. D. Ward).
85. When is approximation by Gaussian networks necessarily a linear process?; Neural Networks, {\bf 17} (2004), 989--1001.
86. Local quadrature formulas on the sphere; Journal of Complexity, {\bf 20} (2004), 753--772.
87. A tribute to G\'eza Freud;  Journal of Approximation Theory, {\bf126} (2004), 1--15. (Invited paper).
88. On the tractability of multivariate integration and approximation by neural networks; Journal of Complexity, {\bf 20} (2004), 561--590.
89. Local quadrature formulas on the sphere, II;  in ``Advances in Constructive Approximation'' (M. Neamtu and E. B. Saff  eds), Nashboro Press, Nashville, 2004, pp. 333--344
90. On local smoothness classes of periodic functions; Journal of Fourier Analysis and Applications, {\bf 11} (3) (2005), 353 - 373  (with J. Prestin).
91. Polynomial operators and local smoothness classes on the unit interval; Journal of Approximation Theory, {\bf 131}(2004),  243-267.
    
92. On the representation of smooth functions on the sphere using finitely many bits; Applied and Computational Harmonic Analysis {\bf 18}, Issue 3 , May 2005, Pages 215-233.
93. A Markov--Bernstein inequality for Gaussian networks; in ``Trends and applications in constructive approximation'' (M. G. de Bruin, D. H. Mache, and J. Szabados eds.), ISNM {\bf 105}, Birkh\"auser Verlag, Bassel, 2005, pp. 165--180.
94. Polynomial frames: a fast tour; in ``Approximation Theory XI, Gatlinburg, 2004'' (C. K. Chui, M. Neamtu, and L. Schumaker Eds.), Nashboro Press, Brentwood, 2005, 287--318. (With J. Prestin) (Invited paper).
95. Polynomial operators and local approximation of solutions of pseudo-differential equations on the sphere;  Numerische Mathematik, {\bf 103} (2006), 299--322. (With Q. T. Le Gia).
96. Matrix--free interpolation on the sphere;  SIAM J. Numer. Analysis {\bf 44} (3) (2006), pp. 1314--1331. (With M. Ganesh).
97. Weighted quadrature formulas and approximation by zonal function networks on the sphere;  Journal of Complexity Theory, {\bf 22} (3), June 2006, 348--370.
98. Quadrature--free quasi--interpolation on the sphere;  Electronic Transactions on Numerical Analysis,{\bf 25} (2006), 101--114 (With M. Ganesh).
99. On quasi--interpolatory polynomial operators;  in ``Frontiers in interpolation and approximation'' (N. K. Govil, H. N. Mhaskar, R. N. Mohapatra, Z. Nashed, and J. Szabados eds.), Chapman and Hall/CRC, Boca Raton,  2006, pp. 345--364 (Invited paper).
100. Quadrature in Besov spaces on the Euclidean sphere; Journal of Complexity, {\bf 23} (2007), 528--552 (With K. Hesse and I. H. Sloan).
101. Polynomial operators for spectral approximation of piecewise analytic functions;  Appl. Comput. Harmon. Anal. {\bf 26} (2009) 121--142  (With J. Prestin).
102. Diffusion polynomial frames on metric measure spaces;  Applied and Computational Harmonic Analysis, Volume 24, Issue 3, May 2008, Pages 329-353 (With M. Maggioni).
103. Localized linear polynomial operators and  quadrature formulas on the sphere;  SIAM J. Numer. Anal. {\bf 47} (1) (2008), 440--466. (With Q. T. Le Gia).
104. Polynomial operators and local smoothness classes on the unit interval, II;  Ja\'en J. of Approx., {\bf 1} (1) (2009), 1--25.  (Invited paper)
105. On a filter for exponentially localized kernels based on Jacobi polynomials;  J. Approx. Theory, 160 (2009), pp. 256-280 (With F. Filbir and J. Prestin)
106. Minimum Sobolev Norm Schemes and Applications in Image Processing, Proceedings of the IS\&T/SPIE Symposium on Electronic Imaging:
     Science \& Technology, San Jos\'e, CA, January 2010 (With S. Chandrasekaran, K. R. Jayaraman, J. Moffitt, and S. Pauli).
107. A quadrature formula for diffusion polynomials corresponding to a generalized heat kernel; Journal of Fourier Analysis and Applications  16 (2010), 629--657(with F. Filbir)
108. $L^p$ Bernstein estimates and approximation by spherical basis functions; Math. Comp.  79  (2010),  no. 271, 1647--1679 (With F. Narcowich, J. Prestin, and J. D. Ward)
109. Eignets for function approximation; Appl. Comput. Harmon. Anal. 29 (2010) 63–87
110. MRA Contextual-Recovery Extension of Smooth Functions on Manifolds; Appl. Comput. Harmon. Anal. 28 (2010) 104--113 (With C. K. Chui).
111. Wiener type theorems for Jacobi series with nonnegative coefficients; Accepted for publication in Proceedings of the American Mathematical Society (With S. Tikhonov).
112. A generalized diffusion frame for parsimonious representation of functions on  data defined manifolds; Neural Networks 24 (2011) 345--359.
113. Marcinkiewicz--Zygmund measures on manifolds; Journal of Complexity, {\bf 27} (2011), 568--596 (With F. Filbir)
114. On the problem of parameter estimation in exponential sums; Accepted  for publication in Constructive Approximation (With F. Filbir and J. Prestin)
115. Minimum Sobolev norm interpolation with trigonometric polynomials on   the torus; Submitted for publication (With S.~Chandrasekaran and K.~R.~Jayaraman).
116. Smooth function extension based on high dimensional unstructured data; Submitted for publication (With C. K. Chui)