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COMPUTABLE LINEAR ORDERS AND PRODUCTS

Part of: Computability and recursion theory Model theory

Published online by Cambridge University Press:  20 July 2020

ANDREY N. FROLOV ,
STEFFEN LEMPP ,
KENG MENG NG  and
GUOHUA WU
ANDREY N. FROLOV
Affiliation:
HIGHER INSTITUTE OF INFORMATION TECHNOLOGY AND INTELLIGENT SYSTEMS KAZAN FEDERAL UNIVERSITY KAZAN 420008 , RUSSIA E-mail: a.frolov.kpfu@gmail.com
STEFFEN LEMPP
Affiliation:
DEPARTMENT OF MATHEMATICS UNIVERSITY OF WISCONSIN MADISON, WI 53706-1388, USA E-mail: lempp@math.wisc.edu URL: http://www.math.wisc.edu/∼lempp/
KENG MENG NG
Affiliation:
SCHOOL OF PHYSICAL AND MATHEMATICAL SCIENCES NANYANG TECHNOLOGICAL UNIVERSITY SINGAPORE 637371, REPUBLIC OF SINGAPORE E-mail: kmng@ntu.edu.sg URL: http://www3.ntu.edu.sg/home/kmng/ E-mail: guohua@ntu.edu.sg URL: http://www3.ntu.edu.sg/home/guohua/
GUOHUA WU
Affiliation:
SCHOOL OF PHYSICAL AND MATHEMATICAL SCIENCES NANYANG TECHNOLOGICAL UNIVERSITY SINGAPORE 637371, REPUBLIC OF SINGAPORE E-mail: kmng@ntu.edu.sg URL: http://www3.ntu.edu.sg/home/kmng/ E-mail: guohua@ntu.edu.sg URL: http://www3.ntu.edu.sg/home/guohua/
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Abstract

We characterize the linear order types $\tau $ with the property that given any countable linear order $\mathcal {L}$, $\tau \cdot \mathcal {L}$ is a computable linear order iff $\mathcal {L}$ is a computable linear order, as exactly the finite nonempty order types.

Keywords

computable linear orderproduct

MSC classification

Primary: 03D45: Theory of numerations, effectively presented structures
Secondary: 03C57: Effective and recursion-theoretic model theory

Information

Type
Articles
Information
The Journal of Symbolic Logic , Volume 85 , Issue 2 , June 2020 , pp. 605 - 623
Copyright
© The Association for Symbolic Logic 2020

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References

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