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# ?X #< ?Y

The linear term X is less than the linear term Y.
*?X*
- A linear term.
*?Y*
- A linear term.

## Description

This constraint states that the linear term X is less than the linear
term Y. It is activated whenever the maximum or minimum of a domain
variable is updated that might require updating other domains. When
propagating domain updates, the system takes into account only maximum
and minimum values of the whole domain and makes sure that these values
are consistent with those of other domain variables.
If one of the arguments is a non-linear polynomial, this predicate
delays until it becomes linear.

### Fail Conditions

Fails if X is not less than Y.
### Resatisfiable

No.
## See Also

#>= / 2, #> / 2, #<= / 2, #= / 2, ## / 2