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Equivalence structures and isomorphisms in the difference hierarchy
Cenzer, Douglas, Laforte, Geoffrey, Remmel, JeffreyVolume:
74
Language:
english
Journal:
The Journal of Symbolic Logic
DOI:
10.2178/jsl/1243948326
Date:
June, 2009
File:
PDF, 1.61 MB
english, 2009