## Notre Dame Journal of Formal Logic

### Arithmetically Saturated Models of Arithmetic

#### Abstract

The paper presents an outline of the general theory of countable arithmetically saturated models of PA and some of its applications. We consider questions concerning the automorphism group of a countable recursively saturated model of PA. We prove new results concerning fixed point sets, open subgroups, and the cofinality of the automorphism group. We also prove that the standard system of a countable arithmetically saturated model of PA is determined by the lattice of its elementary substructures.

#### Article information

Source
Notre Dame J. Formal Logic, Volume 36, Number 4 (1995), 531-546.

Dates
First available in Project Euclid: 17 December 2002

https://projecteuclid.org/euclid.ndjfl/1040136914

Digital Object Identifier
doi:10.1305/ndjfl/1040136914

Mathematical Reviews number (MathSciNet)
MR1368465

Zentralblatt MATH identifier
0848.03017

#### Citation

Kossak, Roman; Schmerl, James H. Arithmetically Saturated Models of Arithmetic. Notre Dame J. Formal Logic 36 (1995), no. 4, 531--546. doi:10.1305/ndjfl/1040136914. https://projecteuclid.org/euclid.ndjfl/1040136914

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