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» Changing the subject: on the subject of subjectivity
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ITA
2008
137views Communications» more  ITA 2008»
15 years 6 months ago
Weakly maximal decidable structures
We prove that there exists a structure M whose monadic second order theory is decidable, and such that the elementary theory of every expansion of M by a constant is undecidable. 1...
Alexis Bès, Patrick Cégielski
IJAC
2007
85views more  IJAC 2007»
15 years 6 months ago
Limit Groups are Conjugacy Separable
A limit group is a finitely generated subgroup of a residually free group. We prove the result announced in the tittle. 2000 Mathematics Subject Classification: 20E06, 20E08, 20...
S. C. Chagas, Pavel Zalesskii
SIGIR
2008
ACM
15 years 6 months ago
Improving relevance feedback in language modeling with score regularization
We demonstrate that regularization can improve feedback in a language modeling framework. Categories and Subject Descriptors: H.3.3 Information Search and Retrieval: Relevance Fee...
Fernando D. Diaz
SIGIR
2008
ACM
15 years 6 months ago
A method for transferring retrieval scores between collections with non-overlapping vocabularies
We present a method for projecting retrieval scores across two corpora with a shared, parallel corpus. Categories and Subject Descriptors: H.3.3 Information Search and Retrieval: ...
Fernando D. Diaz
COMBINATORICS
2004
74views more  COMBINATORICS 2004»
15 years 6 months ago
Voltage Graphs, Group Presentations and Cages
We construct smallest known trivalent graphs for girths 16 and 18. One construction uses voltage graphs, and the other coset enumeration techniques for group presentations. AMS Su...
Geoffrey Exoo