Particle-number restoration within the energy density functional formalism: Nonviability of terms depending on noninteger powers of the density matrices.
Introduction - Strong interaction in the nuclear medium: new trends
Another precedent comes from the study of metabolic networks of single-cell organisms, where perturbations caused by genetic or epigenetic defects can lead to nonviable strains, which are unable to reproduce.
Controlling Complex Networks with Compensatory Perturbations
Indeed, gravitational theories based on a Lagrangian which is only purely quadratic in the curvature tensor have been strongly criticized as nonviable theories.
Lovelock Tensor as Generalized Einstein Tensor
We can see that, because the power of the schedulers is unrestricted, nonviable upper and lower bounds for the probability are obtained.
Testing Reactive Probabilistic Processes