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Discover LudwigThe phrase "a relation was" is correct and usable in written English.
It can be used when discussing a connection or association that existed in the past.
Example: "In the study, it was found that a relation was established between the two variables."
Alternatives: "a relationship existed" or "a connection was formed."
Exact(37)
Moreover, a relation was established between the critical value of θ and Ca and Bo.
During a preceding examination, a relation was found between the ignition energy of a dust cloud and the Oxygen concentration.
A relation was established that enables comparison of the storage characteristic time of any vertical BTES to an optimum one.
A relation was found between the added mass of an unbounded cap body and a bounded spherical body.
A relation was obtained that predict the onset of bubble nucleation showing an excellent agreement with the measurement.
For [Ru(NH3 6]3+/2+ such a relation was not observed and all of the films remained permeable.
Similar(23)
In all timelines in (a), one red P-A relation directly followed by one green P-A relation is found.
Such a relation is called a congruence.
Such a relation is said to be quasi-reflexive.
In mathematics, a relation is an association between, or property of, various objects.
In general, a relation is any set of ordered n-tuples of objects.
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com