WordNet
mathematical relation
n. a relation between mathematical expressions (such as equality or inequality)
Usage examples of "mathematical relation".
Why hasn't it even hinted at what the mathematical relation is between a given path and two given points in space-time, so we can work out how to get from A where we're at to a B which we'd like to visit?
If you're interested, he thinks there's a mathematical relation between a retarder field and a fusion shield.