Does a greater-than relationship between fields within a table violate normalization?

Consider a table with this form:
Key FieldA FieldB

FieldA and FieldB are both numeric and both depend only on the key. There is a constraint that FieldA must be greater than FieldB or the data is invalid. This doesn't violate any of the normal forms as far as I can tell up to 5th Normal Form. Does it? If so, how would you normalize this? Thanks for any info.

No it's normalized already.