I think we also want some version of Denis Simon's indefinite LLL. As a student of Henri Cohen he may have sworn a lifetime vow of allegiance to pari; otherwise this might be something we could use to lure him into Sage!
John 2008/4/30 William Stein <[EMAIL PROTECTED]>: > > ---------- Forwarded message ---------- > From: Gabriele Nebe <[EMAIL PROTECTED]> > Date: Wed, Apr 30, 2008 at 6:18 AM > Subject: Re: Fwd: [sage-devel] A Sage Enhancement Proposal: Lattice Modules > To: William Stein <[EMAIL PROTECTED]> > > > Dear William, > > I am in the moment on a conference in Albania and e-mail is not so easy. > Nevertheless: > if these people want to implement such things, they should just go ahead and > do so. I have no idea how to calculate explicitely isometires of > indefinite lattices, > but in principle we have a program to calculate the genus symbol of > the lattice. > And for indefinite ones this suffices to decide whether they are > isometric or not. > For definite lattices of course lattice reduction procedures (LLL) and > shortest vector enumeration are other basic tools. > > Best > > Gabi > > > > -- > William Stein > Associate Professor of Mathematics > University of Washington > http://wstein.org > > > > > > --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-devel@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-devel URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
