The phrase "a necessary relation" is correct and usable in written English.
It can be used in contexts discussing connections or dependencies between concepts, entities, or phenomena, particularly in philosophy, logic, or science.
Example: "In the study of causality, we often explore the idea of a necessary relation between cause and effect."
Alternatives: "an essential connection" or "a vital link".
This article is about the logic and abstraction seen as a necessary relation in the formative process engineers.
Entailment (necessary knowledge) - a necessary relation about what has to be.
Does this result from an accident or could it be that there in fact exists a necessary relation between associations and equality?
I take it, then, that my pleasure stands in a "necessary" relation to the object which elicits it, where the necessity here can be described (though Kant himself does not use the term) as normative.
A necessary relation exists if an outcome is a subset of a causal condition.
You may panic in a certain situation, which often hardly has any necessary relation to the mind's underlying issues.
Those in the negative camp try to cut off this line of reasoning at the first step, by denying that there is any necessary relation between one's freedom and one's desires.
It requires more stable foundations (strong ties) and less radical changes compared to the new ventures of a serial entrepreneur, where every new venture is potentially isolated without any necessary relations to the previous ones.
Hume (1993) attacks both the view of causation presupposed in the argument (that causation is an objective, productive, necessary relation experienced as power that holds between two things) and the Causal Principle every contingent being has a cause of its being that lies at the heart of the argument.
The president's background in reality television gives him an intuitive sense that the veracity of a thing has no necessary relation to its feeling of truth and in that lies its political force.
While a custodian has no necessary relation to the contents of documents within his control, the act of production is inescapably his own.
