A class of processes which attempt to round off a domain and simplify its theory by adjoining elements.
Existential Closure
See also
Model CompletionExplore with Wolfram|Alpha
References
Manders, K. L. "Domain Extension and the Philosophy of Mathematics." J. Philos. 86, 553-562, 1989.Referenced on Wolfram|Alpha
Existential ClosureCite this as:
Weisstein, Eric W. "Existential Closure." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/ExistentialClosure.html