"rigorous theory" is a correct and usable phrase in written English.
You can use it to describe a theory that is very exacting and demanding in its approach or requirements. For example, "This rigorous theory explains the mechanics of quantum physics in great detail."
Carnap presented a rigorous theory of this kind in his Logical Foundations of Probability (1950).
In this book Lev Manovich offers the first systematic and rigorous theory of new media.
The libertarianism adopted by many Silicon Valley types is the most rigorous theory of this fusion of inclusiveness and capitalism.
So other conditions must be satisfied in order to make this into a really rigorous theory of reference.
A rigorous theory is presented, which gives necessary and sufficient conditions for optimal order approximation.
Artificial neural networks are often used to identify nonlinear systems in the absence of rigorous theory.
More rigorous, theory-driven research is needed to structure intervention efforts and determine the mechanism of action of effective interventions.
The success of the Coupling Model provides some measure of understanding the relaxation properties of complex interacting systems and also paves the way for the construction of rigorous theories in the future.
Throughout Cantor's mathematical career he maintained an unwavering, even dogmatic opposition to infinitesimals, attacking the efforts of mathematicians such as du Bois-Reymond and Veronese[38] to formulate rigorous theories of actual infinitesimals.
The rigorous theories emerging in AI that are beginning to illuminate the workings of causality are important not only in themselves, but in their potentiality to illuminate wider philosophical issues.
Strengths of our approach include our rigorous theory-driven and evidence-based approach to intervention development, our systematic refinement of the intervention based on feasibility and usability data, and our selection of usability assessment techniques.
