On Thu, Dec 17, 2009 at 2:55 PM, Christian Szegedy <christian.szeg...@gmail.com> wrote: > Not an answer, but a side question (probably belongs to sage-devel, anyhow...) > > Why would you use BDDs in the first place? > For almost any applications, SAT-solvers beat BDDs by large margins, > and also have incremental implementations. One of the best (also > insustrially used) > SAT solvers: MiniSAT is available under the permissive MIT license. >
FYI, there has been some efforts towards creating a minisat spkg: http://trac.sagemath.org/sage_trac/ticket/418 http://trac.sagemath.org/sage_trac/ticket/5671 > > On 12/17/09, VictorMiller <victorsmil...@gmail.com> wrote: >> I'm in the middle of implementing SAGE classes for binary decision >> diagrams using the library called CUDD (which is included in >> Polybori). Each BDD is actually a labeled DiGraph. It's standard in >> the BDD literature to draw pictures of the digraph as follows: >> >> the vertex label of a non-leaf is a decision node, and it's standard >> to label it with the variable name. Note that the same variable may >> appear in more than one node, so this is not the same as the vertex >> labeling convention for DiGraph in sage. Each decision node also >> always has two outgoing directed edges -- the true edge which is drawn >> with a solid line, and the false edge with a dotted line. Is there a >> way in the plotting package from graph to have different edge >> rendering depending on some criterion? It would also be nice if the >> graph package could be supplemented to allow extra labels to be >> associated with each vertex (besides its unique label), and to have an >> option for plot of just printing the extra information. It's also >> traditional in the BDD literature to print the leaves (terminal nodes) >> with boxes around them instead of circles. >> >> What do people think about some way of enriching the graph package to >> allow such things? >> >> Victor >> >> >> -- >> To post to this group, send email to sage-support@googlegroups.com >> To unsubscribe from this group, send email to >> sage-support+unsubscr...@googlegroups.com >> For more options, visit this group at >> http://groups.google.com/group/sage-support >> URL: http://www.sagemath.org >> > > -- > To post to this group, send email to sage-support@googlegroups.com > To unsubscribe from this group, send email to > sage-support+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/sage-support > URL: http://www.sagemath.org > -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
