The phrase "a simple theory for" is correct and usable in written English.
You can use it when introducing a straightforward explanation or model for a particular concept or phenomenon.
Example: "In this paper, we propose a simple theory for understanding the dynamics of social interactions."
Alternatives: "an easy explanation for" or "a basic model for".
But the research, by Dr. Bigeleisen and Maria Goeppert-Mayer, who would later win a Nobel Prize in Physics, resulted in a simple theory for calculating the behavior of isotopes in gaseous reactions, which helped open the new field of isotope chemistry.
A simple theory for representing a foam absorbing material is presented in terms of the static resistivity and the effective density.
A simple theory for unmixing two known triplet lifetimes is presented along with validation of the method by measurements of transferrin recycling in a model system based on chinese hamster ovarian cells (CHO).
We present accurate numerical methods for calculating the one boson and the one fermion loop energy in a static, spherically symmetric background field for a simple theory of fermions interacting with bosons through Yukawa coupling.
A simple theory is derived for predicting multicomponent diffusion on solid surfaces and in molecular sieves with energetic heterogeneity.
This article presents a simple theory and guidelines for estimating total and partial porosities in multi-phase cellular materials with granular structure, based on mass measurements in different phases of production process.
A simple theory was derived for the quantitative determination of mechanical properties of non-adherent melanoma cells confined between two flat surfaces.
Before the days of social media dominance, a 22-year-old Ohanian had a simple theory: "the old model for news aggregation, when it was printed on a dead tree, wasn't suited for the Internet age," he writes.
Parker, in the end, has a more simple theory for how to build team confidence and chemistry, the elusive components of all winning teams.
A synthetic regulatory network of a mutually inhibitory double negative feedback loop in Escherichia coli also provides bistability, and a simple theory that predicts the conditions necessary for bistability has been suggested [5].
Both versions of the theory came under attack: the simple theory for being too weak, the ramified theory for being too strong.
