Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Unmixedness and arithmetic properties of matroidal ideals   Let $R=k[x_1,...,x_n]$ be the polynomial ring in $n$ variables over a field
$k$ and $I$ be a matroidal ideal of degree $d$. In this paper, we study the
unmixedness properties and the arithmetical rank of $I$. Moreover, we show that
$ara(I)=n-d+1$. This answer to the conjecture that made by H. J. Chiang-Hsieh
\cite[Conjecture]{C}.

3
The categories of this paper are: physics
22
The categories of this paper are: chao-dyn
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The categories of this paper are: solv-int
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The categories of this paper are: funct-an
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The categories of this paper are: math-ph
31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph
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The categories of this paper are: dg-ga
0
The categories of this paper are: hep-ph
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The categories of this paper are: eess
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The categories of this paper are: adap-org
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The categories of this paper are: alg-geom
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The categories of this paper are: nucl-ex
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The categories of this paper are: astro-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: nucl-th