In a textbook, Principles of Mathematical Logic by Hilbert and Ackermann, the authors wrote, "The Entscheidungsproblem is solved when we know a procedure that allows for any given logical expression to decide by finitely many operations its validity or satisfiability.… The entscheidungsproblem must be considered the main problem of mathematical logic".
BPD = bronchopulmonary dysplasia; RSV = respiratory syncytial virus; QALY = quality-adjusted life years For this demonstration of the model's operation and internal validity, we have used solely the data from the PREVASC studies.
More precisely, the following operations preserve the validity of a hypothesis given in the positive representation: changing order of columns in the matrix changing order of literals in a column adding a column (Ctheta ) to the matrix containing the column (C).
It is designed to maintain the repository consistency and to provide a strict reproduction of user's decisions by guaranteeing the validity of operations and by reapplying only valid operations.
Marriage made Scott free, and from that state there was no going back: If, in Missouri, the plaintiff were held to be a slave, the validity and operation of his contract of marriage must be denied.
Laser operation nicely demonstrates the validity of the concept of designer lasers.
Additionally, the saturation indicators readily describe damper failures like e.g. oil leakage which extends the controller validity from normal operation to faulty operation modes.
However, the active participation of the end-users, i.e. farmers and veterinarians, in the modelling-validating process is emphasized as an important part of the usefulness dimension of validity in operations research [ 24].
For example, network risk metrics in operations could improve the validity of network risk metrics by including some of our most agreed upon risky and safe factors.
"The facts of how the fare-splitting services operate and the absence of a public policy reason to cease such operations in California leads us to affirm the validity of these operations," the CPUC wrote in its decision.
