[ library(COLIBRI_DOC) | ]
X $= Y
X is equal to Y.
- X
- A Real term.
- Y
- A Real term.
Description
This constraints states that the two terms are equal. It is activated whenever a bound of a domain variable is updated that might require updating other domains. This constraints exists also in a reified form, (X $= Y) #= Bool, where Bool is an int variable ranging in 0..1.
Fail Conditions
Fails if the two terms have a different value.
Resatisfiable
no
Examples
Success:
real_vars(double,[X,Y]), X $: 1.0 .. 10.0, Y $: 5.0 .. 20.0, X $= Y.
(gives X = _436{[5.0 .. 10.0]}, Y = _436{[5.0 .. 10.0]})
Fail:
real_vars(double,[X,Y]), X $: 1.0 .. 10.0, Y $: 15.0 .. 20.0, X $= Y.
See Also
$: / 2, real_vars / 2