The phrase 'express a relation' is correct and is commonly used in written English.
For example, an author might write: "The novel attempts to express a relation between two seemingly disparate characters."
An equation was established to express a relation between the gauge size and geometrical design parameters of the collimator, by applying a normal distribution curve to the error distribution of measured gauge size.
The classical Jackson and Bernstein inequalities express a relation between smoothness modules of functions and properties of their best approximations by polynomials or entire functions of exponential type that can be characterized with the help of Besov norms [[1], Sections 1.5, 7.2].
Quine escapes this sort of problem by taking an attribution of belief to express a relation between the believer and a sentence, understood to be, in the usual case, in the language of the ascriber (not the language of the believer, where the languages differ).
Bene argues that quantum states are relative in the sense that they express a relation between a system to be described and a different system, containing the former as a subsystem and acting for it as a quantum reference system (here the system is contained in the reference system, while in Breuer's work the system contains the apparatus).
provide paradigm instances of what are commonly thought to be connectives, i.e., expressions that link sentences but without expressing a relation that holds between the states of affairs, facts or tropes that these sentences denote.
Belief systems, myths, and the like, are viewed as expressions of the nature of the sacred realm in which ritual becomes the determined conduct of the individual in a society expressing a relation to the sacred and the profane.
The statement expresses a relation between two resources the subject and the object.
It may be strengthened by turning it into a logically stronger conditional — specifically, a conditional expressing a relation that supports counterfactuals.
"Association" (in associative structures) just denotes a causal relation among mental representations, whereas predication (roughly) expresses a relation between things in the world (or intentional contents that specify external relations).
For example, he claims that categorical judgments express a logical relation between subject and predicate that corresponds to the ontological relation between substance and accident; and the logical form of a hypothetical judgment expresses a relation that corresponds to cause and effect.
In fact, Barwise's argument showing that direct perception see selects a situation is very much like Davidson's argument showing that the verb cause expresses a relation between events (Davidson 1967b, 1980).
