Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cross Ratios of Quadrilateral Linkages   We discuss the cross-ratio map of planar quadrilateral linkages, also in the
case when one of the links is telescopic. Most of our results are valid for a
planar quadrilateral linkage with generic lengths of the sides. In particular,
we describe the image of cross-ratio map for quadrilateral linkage and planar
robot 3-arm.

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The categories of this paper are: q-alg
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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: nucl-ex
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The categories of this paper are: dg-ga
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The categories of this paper are: ao-sci
13
The categories of this paper are: quant-ph
26
The categories of this paper are: bayes-an
3
The categories of this paper are: physics
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The categories of this paper are: solv-int
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The categories of this paper are: math-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: hep-ex
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The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol
6
The categories of this paper are: astro-ph