View source for Omega-completeness

{{TEX|done}}
''$\omega$-completeness''

The property of formal systems of arithmetic in which, for any formula $A(x)$, from a deduction of $A(\bar0),\ldots,A(\bar n),\ldots,$ it follows that one can infer the formula $\forall xA(x)$, where $\bar n$ is a constant signifying the natural number $n$. If this is not true, the system is called $\omega$-incomplete. K. Gödel in his incompleteness theorem (cf. [[Gödel incompleteness theorem]]) actually established the $\omega$-incompleteness of formal arithmetic. If all formulas which are true in the standard model of arithmetic are taken as axioms, then an $\omega$-complete axiom system is obtained. On the other hand, in every $\omega$-complete extension of Peano arithmetic, every formula which is true in the standard model can be deduced.

====References====
<table><TR><TD valign="top">[1]</TD> <TD valign="top">  S.C. Kleene,   "Introduction to metamathematics" , North-Holland  (1951)</TD></TR></table>