Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: New examples of small Polish structures   We answer some questions from a paper of Krupi\'nski by giving suitable
examples of small Polish structures. First, we present a class of small Polish
group structures without generic elements. Next, we construct a first example
of a small non-zero-dimensional Polish $G$-group.

6
The categories of this paper are: astro-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: nlin
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The categories of this paper are: hep-ex
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The categories of this paper are: nucl-ex
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The categories of this paper are: quant-ph
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The categories of this paper are: math-ph
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The categories of this paper are: eess
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The categories of this paper are: q-bio
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The categories of this paper are: cs
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The categories of this paper are: acc-phys
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The categories of this paper are: chao-dyn
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The categories of this paper are: chem-ph
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The categories of this paper are: adap-org
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The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th