[ library(ic) | Reference Manual | Alphabetic Index ]


Returns the current propagation threshold.
Current threshold


Returns the current threshold. For non-integer variables, bounds are only changed if the absolute and relative changes of the bound exceed the threshold. This means that constraints over real variables are only guaranteed to be consistent up to the current threshold (over and above any normal widening which occurs).

Limiting the amount of propagation is important for efficiency. A higher threshold speeds up computations, but reduces precision and may in the extreme case prevent the system from being able to locate individual solutions.

Modes and Determinism

See Also

set_threshold / 1, set_threshold / 2