On Sun, Jun 18, 2023 at 9:09 AM Vincent Delecroix <20100.delecr...@gmail.com> wrote: > > sage: G1.spanning_trees_count(root_vertex=0) > 27202601182632270746156805986464038912000 > sage: G2.spanning_trees_count(root_vertex=6) > 27202601182632270746156805986464038912000
indeed, and for all other vertices I get 40803901773948406119235208979696058368000 so this is OK on my machine, at least. > > On Sun, 18 Jun 2023 at 09:49, Georgi Guninski <ggunin...@gmail.com> wrote: > > > > On Sun, Jun 18, 2023 at 10:16 AM Emmanuel Briand > > <emmanuel.bri...@gmail.com> wrote: > > > > > > Have you taken into account the following? > > > > > > ignature: G1.spanning_trees_count(root_vertex=None) > > > Docstring: > > > Return the number of spanning trees in a graph. > > > > > > In the case of a digraph, counts the number of spanning out-trees > > > rooted in "root_vertex". Default is to set first vertex as root. > > > > > > > > > > Thanks, I should have RTFM. > > > > This still doesn't work for me: > > > > sage: > > G1.spanning_trees_count(root_vertex=None),G2.spanning_trees_count(root_ver > > ....: tex=None) > > (27202601182632270746156805986464038912000, > > 40803901773948406119235208979696058368000) > > > > > > Is it rigorous to set c1=G1.spanning_trees_count() > > and then do: > > > > sage: c1=G1.spanning_trees_count() > > sage: for i in range(G1.order()): > > ....: c2=G2.spanning_trees_count(i) > > ....: if c2==c1: print(i) > > ....: > > 6 > > > > I expect for isomorphic multi digraphs the loop to find equal c1,c2? > > > > -- > > You received this message because you are subscribed to the Google Groups > > "sage-devel" group. > > To unsubscribe from this group and stop receiving emails from it, send an > > email to sage-devel+unsubscr...@googlegroups.com. > > To view this discussion on the web visit > > https://groups.google.com/d/msgid/sage-devel/CAGUWgD_Zkf7g2py2PxWkYA4PqBOW6Ws%2BW31JtsQF2nmO6JE9tg%40mail.gmail.com. > > -- > You received this message because you are subscribed to the Google Groups > "sage-devel" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to sage-devel+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/sage-devel/CAGEwAAntJP%3DXemn%2BAmnYt6BfRfq8GujWQYZSpAjPyA81oOHxEw%40mail.gmail.com. -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-devel/CAAWYfq1xeemQ8LQyz5NTXQfSCGj5NRiyK1K1hpo6j7yWpny8%2BQ%40mail.gmail.com.
