MGNet: a multigrid and domain decomposition network Craig C. Douglas Department of Computer Science, Yale University, P. O. Box 2158, New Haven, CT 06520-2158. E-mail: douglas-craig@cs.yale.edu Abstract: MGNet provides a mechanism for exchanging information and computer programs related to multigrid and/or domain decomposition methods. To appear in SIGNUM Newsletter, 27 (1992), no. 4.