dear group,
I found a tiny typo ('spelling mistake') in graphs_documentation.pdf of the nice package
GRAPHS in paragraph 'Visualizing graphs': "There is a function draw_graph, which is used
to draw graphs. [..]
program: one of graphviz programs (dot, neato, twopi, circ, fdp) [..]"
^^^^
circo
Only the option 'circo' (as in the doc from graphviz) works for me.
Maybe this is a typo?
Also in the second picture (%i7) it should read:
(%i7) draw_graph(heawood_graph(), program=circular, show_id=true)
^^^^^
circo
HTH Wolfgang