Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Normal Factorization in $SL(2,Z)$ and the Confluence of Singular Fibers
  in Elliptic Fibrations   In this article we obtain a result about the uniqueness of factorization in
terms of conjugates of the matrix $U=(\xymatrix{1 & 1 0 & 1})$, of some
matrices representing the conjugacy classes of those elements of $SL(2,Z)$
arising as the monodromy around a singular fiber in an elliptic fibration (i.e.
those matrices that appear in Kodaira's list).

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The categories of this paper are: funct-an
14
The categories of this paper are: math-ph
8
The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg
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The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th
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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: physics
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The categories of this paper are: adap-org
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The categories of this paper are: hep-th
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The categories of this paper are: supr-con
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The categories of this paper are: mtrl-th
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The categories of this paper are: plasm-ph
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The categories of this paper are: acc-phys
1
The categories of this paper are: cs