The phrase "underlying theories" is correct and usable in written English.
It is often used to refer to theories or concepts that provide a basis for the explanation of something. For example, "The study provides evidence to support the underlying theories of evolutionary biology."
data to evaluate and extend the underlying theories.
SMT extends the propositional satisfiability by introducing various underlying theories.
Underlying theories associated with instruments are often lost during implementation or remain unsubstantiated.
Bassi, A., Lochan, K., Satin, S., Singh, T. P. & Ulbricht, H. Models of wave-function collapse, underlying theories, and experimental tests.
Reviews underlying theories, analytical techniques, and the empirical evidence of the land use-transportation relationship at the metropolitan, intra-metropolitan, and micro-scales.
Due to the dynamics of underlying theories, argument construction is not a monotonic process, which is different from the existing argumentation framework where arguments are constructed incrementally.
As with the first Metaketa, each of the new clusters of studies consists of RCTs that are coordinated on underlying theories, research questions, hypotheses, treatment arms and measurement strategy.
This was the basic assumption underlying theories of the multinational firm (Buckley and Casson 1976; Caves 1982; Dunning 1981).
Tzabbar et al. (2008) suggested that the underlying theories suggesting that more knowledge is always better may not be correct.
If it does go against the basic underlying theories in economics then a good deal of thought needs to be applied to why those rules aren't valid.
As a spin-off, the accelerometer observations provide insight into modeling satellite drag coefficients as well and support the enhancement of underlying theories for upper atmospheric models (Bowman et al., 2008).
