5.237. nset_of_consecutive_values
| DESCRIPTION | LINKS | GRAPH |
- Origin
N.Β Beldiceanu
- Constraint
- Arguments
- Restrictions
- Purpose
is the number of set of consecutive values used by the variables of the collection .
- Example
-
In the example, the two parts and take respectively their values in the following sets of consecutive values and . Consequently, the constraint holds since its first argument is set to the number of sets of consecutive values.
- Symmetries
Items of are permutable.
All occurrences of two distinct values of can be swapped.
One and the same constant can be added to the attribute of all items of .
- Usage
Used for specifying the fact that the values have to be used in a compact way is achieved by setting to 1.
- See also
- Keywords
characteristic of a constraint: consecutive values.
- Arc input(s)
- Arc generator
-
- Arc arity
- Arc constraint(s)
- Graph property(ies)
-
- Graph model
Since the arc constraint is symmetric each strongly connected component of the final graph corresponds exactly to one connected component of the final graph.
PartsΒ (A) andΒ (B) of FigureΒ 5.237.1 respectively show the initial and final graph associated with the Example slot. Since we use the graph property, we show the two strongly connected components of the final graph.
Figure 5.237.1. Initial and final graph of the constraint
(a) (b)