The phrase "main object of study" is correct and usable in written English.
This phrase can be used when referring to something that is being studied or researched in a particular field. For example, "The main object of study in this course is the history of the United States."
Precipitation and passivity, though not the main object of study in this work, are briefly discussed.
What a shock it was for me to realize that I did not even understand the idea of 'function', the main object of study in calculus.
The broad classes of Markov processes with continuous trajectories be came the main object of study.
"Initially the bears were destroying our main object of study—lifetime reproduction of geese.
It should be noted that one of the main object of study is in geometric group theory.
A linearization of this technique will be applied later to prove a corresponding implication in the case of algebras over a field, which is the second main object of study in this article.
Additionally, the paper reviews the existing literature on the main objects of study in financial innovation and groups the findings under four main concepts.
The study of hyperbolic spaces has been largely motivated and dominated by questions about hyperbolic groups, one of the main objects of study in geometric group theory.
In fact, maximal and minimal ranks of matrix expressions or partial matrices have been the main objects of study in matrix theory and applications.
In fact, reverse-order laws have belonged to the main objects of study in the theory of generalized inverses, which have leaded to some essential developments of the theory from the theoretical point of view.
We conclude the article with some results connecting the two main objects of study in the paper locally finite (extended) metric spaces and algebras over a field through precisely the construction of the translation algebra of a locally finite (extended) metric space.
