Published 1981
| public
Book Section - Chapter
A note on Wadge degrees
- Creators
-
Kechris, Alexander S.
Chicago
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Abstract
For pertinent definitions see published works of the Cabal Seminar. It has been shown by D. A. Martin that under the assumption of AD, Wadge degrees are well ordered; for Wadge degrees of Δ^(1)_(2n) sets Δ^(1)_(2n)-determinacy suffices. Martin has also proved (using AD) that the length of the well ordering of Δ^(1)_(2n) Wadge degrees is exactly δ^(1)_(2n+1). The author gives an alternate proof of this fact, using only Δ^(1)_(2n)-determinacy.
Additional Information
© 1981 Springer-Verlag. Research partially supported by NSF Grant MCS-17254 A01. The author is an A.P. Sloan Foundation Fellow.Additional details
- Eprint ID
- 38707
- DOI
- 10.1007/BFb0090240
- Resolver ID
- CaltechAUTHORS:20130529-162228399
- NSF
- MCS-17254 A01
- Created
-
2013-05-31Created from EPrint's datestamp field
- Updated
-
2021-11-09Created from EPrint's last_modified field
- Series Name
- Lecture Notes in Mathematics
- Series Volume or Issue Number
- 839