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INVARIANCE AND NONINVARIANCE IN THE LATTICE OF $\Pi_1^0$ CLASSES

Published online by Cambridge University Press:  03 December 2004

PETER A. CHOLAK  and
ROD DOWNEY
PETER A. CHOLAK
Affiliation:
Department of Mathematics, University of Notre Dame, Notre Dame, IN 46556-5683, USApeter.cholak.1@nd.edu
ROD DOWNEY
Affiliation:
School of Mathematics, Statistics and Computer Science, Victoria University, PO Box 600, Wellington, New Zealandrod.downey@vuw.ac.nz
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Abstract

It is proved that there are two minimal $\Pi_1^0$ classes that are not automorphic.

Keywords

03D2503D2803D45
Type
Notes and Papers
Information
Journal of the London Mathematical Society , Volume 70 , Issue 3 , December 2004 , pp. 735 - 749
Copyright
The London Mathematical Society 2004

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