vestal (03/15/83)
I've got a linear programming package which currently runs on Z80's under CP/M. It should be available on the IBM PC within two months or so. While I'm negotiating with publishers (since I would like to avoid that headache if possible) I'm making some copies available on loan to get some user feedback. If you're interested, read on... The program input is a simple matrix generation language. The solution is obtained by a primal/dual simplex algorithm operating on an inverse matrix contained entirely in memory. A 64K system can hold about 4000 non-zero matrix entries. A zero-check is employed to eliminate non-significant matrix entries as they occur, and a technique to handle degeneracy is employed. The solution report shows for each variable/constraint the optimal/surplus value, error estimate, marginal value, and cost/RHS range within which solution is unchanged. Much effort has gone into providing complete and specific diagnostics, as well as an easy-to-use matrix generator. If you're still interested, reply via mail or: Stephen Vestal The Acme Computer Company Box 51193 Seattle, WA 98115