Media type: E-Article Title: Index sets and parametric reductions Contributor: Downey, Rod G.; Fellows, Michael R. Published: Springer Science and Business Media LLC, 2001 Published in: Archive for Mathematical Logic, 40 (2001) 5, Seite 329-348 Language: Not determined DOI: 10.1007/s001530100082 ISSN: 0933-5846; 1432-0665 Keywords: Logic ; Philosophy Origination: Footnote: