The file maple.ini gives various routines; only some of these are actually used here. The most important is fil which is used to load files from the directory given by the variable MyDirectory defined; the file should be edited so that MyDirectory gives the name of the directory where the files are placed.
Running HelpOn() will make some of the routines give some guidance. This may be turned of by HelpOff().
The file CYfamily (file-type is always txt unless otherwise specified) is a front for a series of other files and routines. Here is an overview of the purposes of each file:
Please note that these routines may not be assumed to be bug free. Some problems may arise from the routines being written on an old Maple platform and some updating of the code may be needed. Also, once the routines have worked on my own examples, I have stopped looking for further errors.
The file QH is for doing quantum cohomology. It starts of by taking a matrix A such that V*p=V*A for V a basis: ie., if x=V*W is an element, W a vector representing the element in the V-basis, then multiplication by p amounts to W->A*W. From entering this matrix, the Picard-Fuchs differential operator may be found.
This package also contains routines for multiplying and dividing differential operators.
Back to homepageCreated 03 January 1999 by Einar Andreas Rødland.