Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Review of Cyclic Reduction for Parallel Solution of Hermitian Positive
  Definite Block-Tridiagonal Linear Systems   Cyclic reduction is a method for the solution of (block-)tridiagonal linear
systems. In this note we review the method tailored to hermitian positive
definite banded linear systems.
  The reviewed method has the following advantages: It is numerically stable
without pivoting. It is suitable for parallel computations. In the presented
form, it uses fewer computations by exploiting symmetry. Like Cholesky, the
reviewed method breaks down when the matrix is not positive definite, offering
a robust way for determining positive definiteness.

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The categories of this paper are: chem-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: bayes-an
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The categories of this paper are: nucl-ex
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The categories of this paper are: solv-int
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The categories of this paper are: cs
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The categories of this paper are: physics
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The categories of this paper are: chao-dyn
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The categories of this paper are: eess
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The categories of this paper are: econ
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The categories of this paper are: astro-ph
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The categories of this paper are: hep-th
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The categories of this paper are: q-bio
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The categories of this paper are: mtrl-th
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The categories of this paper are: hep-ex