ORDINAL ANALYSIS OF PARTIAL COMBINATORY ALGEBRAS
ORDINAL ANALYSIS OF PARTIAL COMBINATORY ALGEBRAS
复制标题
部分组合代数的序分析
DOI:
10.1017/jsl.2021.50
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
SHAFER P
中科院分区:
文献类型:
--
作者:
SHAFER P
For every partial combinatory algebra (pca), we define a hierarchy of extensionality relations using ordinals. We investigate the closure ordinals of pca’s, i.e., the smallest ordinals where these relations become equal. We show that the closure ordinal of Kleene’s first model is and that the closure ordinal of Kleene’s second model is . We calculate the exact complexities of the extensionality relations in Kleene’s first model, showing that they exhaust the hyperarithmetical hierarchy. We also discuss embeddings of pca’s.
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影响因子:
0.6
作者:
M. Rathjen
通讯作者:
M. Rathjen
DOI:
--
发表时间:
2014
期刊:
影响因子:
--
作者:
Program
通讯作者:
Program
影响因子:
0.6
作者:
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通讯作者:
Y. Moschovakis
DOI:
10.1305/ndjfl/1071505769
发表时间:
2002
期刊:
Notre Dame J. Formal Log.
影响因子:
--
作者:
D. Hirschfeldt;Walker M. White
通讯作者:
Walker M. White
DOI:
10.1016/j.apal.2019.04.013
发表时间:
2018
期刊:
Ann. Pure Appl. Log.
影响因子:
--
作者:
H. Barendregt;S. Terwijn
通讯作者:
S. Terwijn