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1.5. Some more constraints..... 21

1.5 Some more constraints.....

TOY(FD) also provides a set of constraints (not shown in Table 1.2), called reﬂection

constraints, that allow to recover information about constrained FD variables and their

associated domains during the solving of a goal

EXAMPLE 1.1 The reﬂection constraints

fd min, fd max :: int → int

applied to a FD variable return respectively the minimum and maximum value of this

FD variable in its current domain).

These constraint are the issue of a further paper and for this reason they will noe be

describe here in detail. The interested reader is encouraged to visit the link proposed

in Fern´andez et al., 2002b for a more detailed explanation (when available as this will

information be published as new constraints appear).

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Ascend FD-23R Manual de usuario Pagina 33