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ACM Transactions on Mathematical Software (TOMS), Volume 15 Issue 3, Sept. 1989

A fast adaptive grid scheme for elliptic partial differential equations
Calvin J. Ribbens
Pages: 179-197
DOI: 10.1145/66888.66889
We describe the Recursive Subdivision (RS) method-an efficient and effective adaptive grid scheme for two-dimensional elliptic partial differential equations (PDEs). The RS method generates a new grid by recursively subdividing a rectangular...

A graph partitioning algorithm by node separators
Joseph W. H. Liu
Pages: 198-219
DOI: 10.1145/66888.66890
A heuristic graph partitioning scheme is presented to determine effective node separators for undirected graphs. An initial separator is first obtained from the minimum degree ordering, an algorithm designed originally to produce fill-reducing...

Constrained nonlinear least squares: an exact penalty approach with projected structured quasi-Newton updates
Nezam Mahdavi-Amiri, Richard H. Bartels
Pages: 220-242
DOI: 10.1145/66888.66891
This paper is concerned with the development, numerical implementation, and testing of an algorithm for solving constrained nonlinear least squares problems. The algorithm is an adaptation of the least squares case of an exact penalty method for...

Algorithm 675: Fortran subroutines for computing the square root covariance filter and square root information filter in dense or Hessenberg forms
M. Vanbegin, M. Verhaegen
Pages: 243-256
DOI: 10.1145/66888.69647
In this paper, codes are provided for two of the most popular square root filters: the Square Root Covariance Filter and the Square Root Information Filter. We also give efficient implementations for the time invariant case based on so-called...

Remark on algorithm 587
V. Dadurkevicius
Pages: 257-261
DOI: 10.1145/66888.77344
The subroutine WNNLS of Algorithm 587 has exposed some shortcomings, especially in solving rank-deficient problems. They may lead to fatal errors and (or) false results. Five improvements are proposed. The effect of the changes is tested on four...

Remark on algorithm 630
A. Buckley
Pages: 262-274
DOI: 10.1145/66888.69648

Residual hermite normal form computations
Paul D. Domich
Pages: 275-286
DOI: 10.1145/66888.66892
This paper extends the class of Hermite normal form solution procedures that use modulo determinant arithmetic. Given any relatively prime factorization of the determinant value, integral congruence relations are used to compute the Hermite...

Corrigenda: “Two FORTRAN Packages for Assessing Initial Value Methods”
W. H. Enright, J. D. Pryce
Page: 287
DOI: 10.1145/66888.356282

Corrigenda: “An Efficient Derivative-Free Method for Solving Nonlinear Equations”
D. Le
Page: 287
DOI: 10.1145/66888.356283

Corrigenda: “Minimizing Multimodal Functions of Continuous Variables with the ‘Simulated Annealing’ Algorithm”:

Full text of the original article is available here


A. Corana, M. and C. Martini and S. Ridella
Page: 287
DOI: 10.1145/66888.356281