Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On Spaces of Infinitesimal Motions and Henneberg Extensions   We investigate certain spaces of infinitesimal motions arising naturally in
the rigidity theory of bar and joint frameworks. We prove some structure
theorems for these spaces and as a consequence are able to deduce some special
cases of a long standing conjecture of Graver, Tay and Whiteley concerning
Henneberg extensions and generically rigid graphs.

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The categories of this paper are: ao-sci
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The categories of this paper are: atom-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: alg-geom
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The categories of this paper are: math-ph
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The categories of this paper are: econ
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The categories of this paper are: stat
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The categories of this paper are: eess
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The categories of this paper are: quant-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: funct-an
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The categories of this paper are: chem-ph
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The categories of this paper are: q-bio
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-lat