This poster, presented at Statphys XX (Paris, July '98), is based upon work reported in the preprint archived as cond-mat/9807374.
(All figures are in postscript.)

1. Title page (369 K) (gzipped 109K)
2. Optimization problems (798 K) (gzipped 173K)
3. Algorithm (no defects) (177 K) (gzipped 33K)
4. Algorithm (with defects) (202 K) (gzipped 38K)
5. Defect core energy (599 K) (gzipped 125K)
6. Fractal dimension of strings (98 K) (gzipped 19K)
7. Screening by defects: pictures (124 K) (gzipped 23K)
8. Screening by defects: scaling of energies (140 K) (gzipped 25K)

Comments to A. Alan Middleton; last revised July 30, 1998.