Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Unary and Binary Classification Approaches and their Implications for
  Authorship Verification   Retrieving indexed documents, not by their topical content but their writing
style opens the door for a number of applications in information retrieval
(IR). One application is to retrieve textual content of a certain author X,
where the queried IR system is provided beforehand with a set of reference
texts of X. Authorship verification (AV), which is a research subject in the
field of digital text forensics, is suitable for this purpose. The task of AV
is to determine if two documents (i.e. an indexed and a reference document)
have been written by the same author X. Even though AV represents a unary
classification problem, a number of existing approaches consider it as a binary
classification task. However, the underlying classification model of an AV
method has a number of serious implications regarding its prerequisites,
evaluability, and applicability. In our comprehensive literature review, we
observed several misunderstandings regarding the differentiation of unary and
binary AV approaches that require consideration. The objective of this paper
is, therefore, to clarify these by proposing clear criteria and new properties
that aim to improve the characterization of existing and future AV approaches.
Given both, we investigate the applicability of eleven existing unary and
binary AV methods as well as four generic unary classification algorithms on
two self-compiled corpora. Furthermore, we highlight an important issue
concerning the evaluation of AV methods based on fixed decision criterions,
which has not been paid attention in previous AV studies.

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The categories of this paper are: comp-gas
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The categories of this paper are: supr-con
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The categories of this paper are: cmp-lg
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The categories of this paper are: q-fin
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The categories of this paper are: alg-geom
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-th
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The categories of this paper are: patt-sol
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The categories of this paper are: hep-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: q-alg
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The categories of this paper are: hep-lat
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The categories of this paper are: eess
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The categories of this paper are: mtrl-th
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The categories of this paper are: math
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The categories of this paper are: adap-org