Countable ordinals and the analytical hierarchy. I.
Kechris, A. S.
Pacific J. Math., Tome 61 (1975) no. 2, p. 223-227 / Harvested from Project Euclid
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Publié le : 1975-05-14
Classification:  02K30,  02K05,  02K15 
@article{1102868636,
     author = {Kechris, A. S.},
     title = {Countable ordinals and the analytical hierarchy. I.},
     journal = {Pacific J. Math.},
     volume = {61},
     number = {2},
     year = {1975},
     pages = { 223-227},
     language = {en},
     url = {http://dml.mathdoc.fr/item/1102868636}
}

Kechris, A. S. Countable ordinals and the analytical hierarchy. I.. Pacific J. Math., Tome 61 (1975) no. 2, pp.  223-227. http://gdmltest.u-ga.fr/item/1102868636/