Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Remark on the Category of Graded F-Modules   Let $R=k[x,y]$ be a polynomial ring over a field $k$ of prime characteristic
$p$ and let $E$ denote the injective hull of $k$ (which is isomorphic to
$H^2_{(x,y)}(R)$). We prove that $E$ is not an injective object in the category
of graded $F$-modules over $R$. This answers in the negative a question raised
by Lyubeznik-Singh-Walther.

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The categories of this paper are: hep-ex
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The categories of this paper are: chao-dyn
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The categories of this paper are: nucl-ex
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The categories of this paper are: q-bio
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The categories of this paper are: atom-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: nucl-th
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The categories of this paper are: q-alg
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The categories of this paper are: q-fin
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The categories of this paper are: hep-lat
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The categories of this paper are: mtrl-th
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The categories of this paper are: gr-qc
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The categories of this paper are: dg-ga
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The categories of this paper are: supr-con
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The categories of this paper are: patt-sol
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The categories of this paper are: adap-org