I'm not sure however, what problems should be classified under Combinatorial Graph Theory. For your contribution about Graceful labeling I'd rather create a category Labeling (may be under Graph Theory -> Coloring ?). But if you have some content for the category, we can add it.

Anyway, thanks for the suggestion (and for the Graceful contribution).

## Yes, we definitely plan to add more categories

I'm not sure however, what problems should be classified under Combinatorial Graph Theory. For your contribution about Graceful labeling I'd rather create a category Labeling (may be under Graph Theory -> Coloring ?). But if you have some content for the category, we can add it.

Anyway, thanks for the suggestion (and for the Graceful contribution).