1. Hansjörg Wacker (1939–1991)

   • Heinz W. Engl

   Announcement Pages: 275 - 278

2. Efficient algorithms for the inclusion of the inverse matrix using error-bounds for hyperpower methods

   • J. Herzberger

   OriginalPaper Pages: 279 - 288

3. Über das Divergenzverhalten des Intervall-Newton-Verfahrens

   • G. Alefeld

   OriginalPaper Pages: 289 - 294

4. On the computation of a matrix inverse square root

   • Nagwa Sherif

   OriginalPaper Pages: 295 - 305

5. An indirect method for computing origins for Hopf bifurcation in two-parameter problems

   • G. Pönisch

   OriginalPaper Pages: 307 - 320

6. Finding maximum cliques in arbitrary and in special graphs

   • L. Babel

   OriginalPaper Pages: 321 - 341

7. α-Vertex separator is NP-hard even for 3-regular graphs

   • R. Müller
   • D. Wagner

   OriginalPaper Pages: 343 - 353

8. Piecewise cubic monotone interpolation with assigned slopes

   • M. G. Gasparo
   • R. Morandi

   OriginalPaper Pages: 355 - 365