1. Digital Sums and Divide-and-Conquer Recurrences: Fourier Expansions and Absolute Convergence

   • Peter J. Grabner
   • Hsien-Kuei Hwang

   OriginalPaper 24 March 2004 Pages: 149 - 179

2. An Extension of an Inequality of Duffin and Schaeffer

   • Geno Nikolov

   OriginalPaper 16 July 2004 Pages: 181 - 191

3. Uncertainty Principles for Sturm–Liouville Operators

   • Zhongkai Li
   • Limin Liu

   OriginalPaper 03 March 2004 Pages: 193 - 205

4. A Characterization of Best φ-Approximants with Applications to Multidimensional Isotonic Approximation

   • F.D. Mazzone
   • H.H. Cuenya

   OriginalPaper 10 August 2004 Pages: 207 - 223

5. On a Uniform Treatment of Darboux’s Method

   • R. Wong
   • Yu-Qiu Zhao

   OriginalPaper 24 March 2004 Pages: 225 - 255

6. Greedy-Type Approximation in Banach Spaces and Applications

   • V. N. Temlyakov

   OriginalPaper 15 June 2004 Pages: 257 - 292