The coloring and labels are as in (a).
The algorithm needs to maintain a current coloring.
Interestingly, their existence is incrementally enforced whenever appropriate propagation operations are used during the coloring process.
Finally, the number of temporary variables is reduced by applying a graph coloring heuristic with the knowledge of which variables have overlapping lifetimes.
Combining the previous guess and check operators yields our first operational characterization of admissible colorings (along with its underlying answer sets).
The evidence of coloring is most intense on the palate and internal surface of the alveolus, but it also often occurs on the external alveolus.
We obtain the following properties for the previous type of coloring sequences.
Note that such an extension constitutes a solution to the coloring problem.
