Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Superdifferential of the Takagi function   The Takagi function is a classical example of a continuous nowhere
differentiable function. It has empty subdifferential except in a countable set
where its subdifferential is $\mathbb{R}$. In this paper we characterize its
superdifferential.

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The categories of this paper are: hep-th
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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-ex
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The categories of this paper are: mtrl-th
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The categories of this paper are: astro-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: stat
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The categories of this paper are: adap-org
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The categories of this paper are: dg-ga
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The categories of this paper are: plasm-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: eess
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The categories of this paper are: q-fin
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The categories of this paper are: nucl-th
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The categories of this paper are: comp-gas
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The categories of this paper are: atom-ph