rreiner@yunexus.YorkU.CA (Richard Reiner) (02/10/91)
I'm looking for a program which will graphically display systems of differential or difference equations. I'm most interested in displaying phase portraits and vector fields, but other displays would also be nice. I've had a look at Huseyin Kocak's very nice program PHASER (from the diskette accompanying his _Differential and Difference Equations Through Computer Experiments_, 2nd ed., Springer Verlag 1989), but it has some limitations on the form and length of equations which make it unsuitable for my purposes. Ideally I'd like to have a program for 80386 under MessDOS using SVGA graphics; a UNIX + Tektronix solution would also be OK. Of course freeware is preferred, and I'd like to have sources, ideally in C. Is there anything like this out there? Thanks, --richard