stroke sequence

[y.kohmoto]

     Marc ReBrun wrote :
>The definition seems OK but it's also kind of long.  This makes it a tough
>call.  I would advise doing a little more thinking and research before
>submitting it.  It's possible that you can create a more succinct
>statement, either by some new insight on your part, or by using some more
>compact or "standard" nomenclature that's used elsewhere (such as in the
>graph theory literature).

    Thank you for your good advice.
    I will research my idea "stroke".
    I think that it is an useful idea so it must exist in graph theory.
    Does anyone know a standard name of the idea "stroke" ?

    I think " local maximal  di-path on di-graph" is better definition.
    How about this?

    Yasutoshi