The phrase "a formulation in a" is correct and usable in written English.
It can be used when discussing a specific formulation or expression within a particular context or framework.
Example: "The scientist presented a formulation in a new theoretical model that explained the observed phenomena."
Alternatives: "an expression in a" or "a definition in a".
Secondly, by introducing a critical self-equilibrated residual stress field, this shakedown problem is reduced to a formulation in terms of a load parameter only.
There is a natural notion of conservative extension which applies directly to (pairs of) consequence relations, but to avoid going into that here, we have adopted a formulation in terms of conservative extension as a relation between proof systems.
Several alternative theories for stationary dynamics of such a plate or a beam are derived, including a formulation in the framework of a theory of elasticity applied for a core ply.
In attacking the gainful employment rule, Cox discussed how a formulation in the rule came from a research paper by "two gentlemen named Baum and Schwartz".
For example, Wu et al. have prepared a formulation in which DNA bound to a cationic methacrylamide-based polymer that was chelated with Eu3+.
Segal et al. (2003) provided a probabilistic formulation, in which a module is a group of genes with high pair-wise similarities of expression profiles and with a significant fraction of possible interactions.
To obtain a common conclusion, Gray et al. [25, 27] investigated the variable-rate ECVQ using a Lagrangian formulation in which a Lagrangian multiplier λ>0 is defined for each rate.
Vitamin E was initiated as an oral formulation in only a few studies, and the doses were heterogeneous.
Recently, the Food and Drug Administration FDAA) has approved a quadrivalent formulation in which an additional strain of influenza B is added [ 14].
