Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Non-expansive bijections, uniformities and polyhedral faces   We extend the result of B. Cascales at al. about expand-contract plasticity
of the unit ball of strictly convex Banach space to those spaces whose unit
ball is the union of all its finite-dimensional polyhedral extreme subsets. We
also extend the definition of expand-contract plasticity to uniform spaces and
generalize the theorem on expand-contract plasticity of totally bounded metric
spaces to this new setting.

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The categories of this paper are: cmp-lg
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The categories of this paper are: dg-ga
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The categories of this paper are: gr-qc
3
The categories of this paper are: physics
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The categories of this paper are: econ
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The categories of this paper are: solv-int
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The categories of this paper are: plasm-ph
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The categories of this paper are: adap-org
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The categories of this paper are: q-bio
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The categories of this paper are: hep-ex
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The categories of this paper are: astro-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: nlin
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The categories of this paper are: mtrl-th
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The categories of this paper are: alg-geom
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The categories of this paper are: supr-con