Ask Your Question
1

Combinatorial maps?

asked 2019-03-03 06:40:17 -0500

anonymous user

Anonymous

updated 2019-03-03 06:44:57 -0500

Does sagemath natively support “combinatorial maps”, as defined for instance on wikipedia?

edit retag flag offensive close merge delete

Comments

See also

sage: graphs.RandomTriangulation?

and

sage: graphs.RandomBicubicPlanar?
FrédéricC gravatar imageFrédéricC ( 2019-03-03 09:25:13 -0500 )edit

But these are instances of _graphs_, so no orientation information, no?

debiais gravatar imagedebiais ( 2019-03-03 09:28:37 -0500 )edit

They do contain orientation information.

FrédéricC gravatar imageFrédéricC ( 2019-03-03 14:40:06 -0500 )edit

Noted, thanks! I'll have a look

debiais gravatar imagedebiais ( 2019-03-03 23:05:46 -0500 )edit

1 answer

Sort by » oldest newest most voted
1

answered 2019-03-03 06:48:51 -0500

vdelecroix gravatar image

Sort of, you can look at RibbonGraph. Though this class does not have a lot of features yet.

edit flag offensive delete link more

Comments

Good thanks! I wouldn't have know from the name only that they are the same as combinatorial maps. By “yet”, do you mean there is activity in making the class more featureful?

debiais gravatar imagedebiais ( 2019-03-03 08:11:37 -0500 )edit

Indeed, there are many synonyms: "fat graphs", "ribbon graphs", "combinatorial maps", "embedded graphs", ... I don't mean there is activity right now, but several people expressed their wishes to provide more code for this in Sage (in particular regarding exhaustive or random generation). Also, there are many related modules around such as flipper.

vdelecroix gravatar imagevdelecroix ( 2019-03-03 10:02:52 -0500 )edit

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.

Add Answer

Question Tools

1 follower

Stats

Asked: 2019-03-03 06:40:17 -0500

Seen: 68 times

Last updated: Mar 03