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**Algorithm 763: INTERVAL_ARITHMETIC**: a Fortran 90 module for an interval data type

R. Baker Kearfott

Pages: 385-392

DOI: 10.1145/235815.235816

**The computation of elementary unitary matrices**

R. B. Lehoucq

Pages: 393-400

DOI: 10.1145/235815.235817

**DESI methods for stiff initial-value problems**

J. C. Butcher, J. R. Cash, M. T. Diamantakis

Pages: 401-422

DOI: 10.1145/235815.235818

**Using the SLEDGE package on Sturm-Liouville problems having nonempty essential spectra**

Michael S. P. Eastham, Charles T. Fulton, Steven Pruess

Pages: 423-446

DOI: 10.1145/235815.235819

**PYTHIA**: a knowledge-based system to select scientific algorithms

Sanjiva Weerawarana, Elias N. Houstis, John R. Rice, Anupam Joshi, Catherine E. Houstis

Pages: 447-468

DOI: 10.1145/235815.235820

**The quickhull algorithm for convex hulls**

C. Bradford Barber, David P. Dobkin, Hannu Huhdanpaa

Pages: 469-483

DOI: 10.1145/235815.235821

The convex hull of a set of points is the smallest convex set that contains the points. This article presents a practical convex hull algorithm that combines the two-dimensional Quickhull algorithm with the general-dimension Beneath-Beyond Algorithm....

**A composition-alias method for generating gamma variates with shape parameter greater than 1**

Tapas K. Sarkar

Pages: 484-492

DOI: 10.1145/235815.235822

**A remark on Bartels and Conn's linearly constrained, discrete l 1 problems**

Roger W. Koenker, Pin T. Ng

Pages: 493-495

DOI: 10.1145/235815.235823

**Remark on “Fast floating-point processing in Common Lisp”**

J. K. Reid

Pages: 496-497

DOI: 10.1145/235815.235824

**Remark on algorithm 723**: Fresnel integrals

W. Van Snyder

Pages: 498-500

DOI: 10.1145/235815.235825