Research output: Contribution to journal › Article › peer-review
Classifying countable Boolean terms. / Selivanov, V. L.
In: Algebra and Logic, Vol. 44, No. 2, 01.03.2005, p. 95-108.Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - Classifying countable Boolean terms
AU - Selivanov, V. L.
PY - 2005/3/1
Y1 - 2005/3/1
N2 - We deal with the Borel and difference hierarchies in the space Pω of all subsets of ω endowed with the Scott topology. (The spaces Pω and 2 ω coincide set-theoretically but differ topologically.) We look at the Wadge reducibility in Pω. The results obtained are applied to the problem of characterizing ω 1-terms t which satisfy C = t(∑ 10 ) for a given Borel-Wadge class C. We give its solution for some levels of the Wadge hierarchy, in particular, all levels of the Hausdorff difference hierarchy. Finally, we come up with a discussion of some relevant facts and open questions. © 2005 Springer Science+Business Media, Inc.
AB - We deal with the Borel and difference hierarchies in the space Pω of all subsets of ω endowed with the Scott topology. (The spaces Pω and 2 ω coincide set-theoretically but differ topologically.) We look at the Wadge reducibility in Pω. The results obtained are applied to the problem of characterizing ω 1-terms t which satisfy C = t(∑ 10 ) for a given Borel-Wadge class C. We give its solution for some levels of the Wadge hierarchy, in particular, all levels of the Hausdorff difference hierarchy. Finally, we come up with a discussion of some relevant facts and open questions. © 2005 Springer Science+Business Media, Inc.
KW - Borel hierarchy
KW - Countable Boolean term
KW - Hausdorff difference hierarchy
KW - Wadge hierarchy
UR - http://www.scopus.com/inward/record.url?scp=18244394004&partnerID=8YFLogxK
U2 - 10.1007/s10469-005-0011-2
DO - 10.1007/s10469-005-0011-2
M3 - Article
AN - SCOPUS:18244394004
VL - 44
SP - 95
EP - 108
JO - Algebra and Logic
JF - Algebra and Logic
SN - 0002-5232
IS - 2
ER -
ID: 127140152