The phrase "aspect of the theory" is correct and usable in written English.
It can be used when discussing a particular feature, element, or component of a theoretical framework or concept.
Example: "One important aspect of the theory is its emphasis on empirical evidence."
Alternatives: "element of the theory" or "component of the theory".
"It's a new aspect of the theory," Dr. Witten said.
But almost every aspect of the theory has been attacked as other experts have had their first chance to scrutinize the research in detail.
One aspect of the theory of sexuality and personal attractiveness is that the uglier people are, the more likely they are to remove their clothes in public.
One aspect of the theory that has received little attention to date is the computational tractability of the processes that it postulates.
A discouraging aspect of the theory was the implication that the formation of solar systems in the Milky Way Galaxy must be extremely rare, because sufficiently close encounters between stars would occur very seldom.
An important aspect of the theory of elasticity is the construction of specific forms of strain-energy function from the results of experiments involving three-dimensional deformations, generalizing the one-dimensional situation described above.
Variation within populations is one of the key aspects of the theory of evolution.
Four examples illustrating various aspects of the theory are provided.
Other less analytic aspects of the theory of partial differential equations also thrive at Columbia.
His publications include Discrete Subgroups of Semisimple Lie Groups (1991) and On Some Aspects of the Theory of Anosov Systems: With a Survey by Richard Sharp (2004).
In the second part of these companion papers the numerical simulation of the computational aspects of the theory are elaborated.
