Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Universality theorems for linkages in the Minkowski plane   A mechanical linkage is a mechanism made of rigid rods linked together by
flexible joints, in which some vertices are fixed and others may move. The
partial configuration space of a linkage is the set of all the possible
positions of a subset of the vertices. We characterize the possible partial
configuration spaces of linkages in the Minkowski plane. We also give a proof
of a differential universality theorem in the Minkowski plane: for any manifold
M which is the interior of a compact manifold with boundary, there is a linkage
which has a configuration space diffeomorphic to the disjoint union of a finite
number of copies of M.

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The categories of this paper are: cmp-lg
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The categories of this paper are: hep-ex
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The categories of this paper are: physics
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The categories of this paper are: hep-th
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The categories of this paper are: q-alg
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The categories of this paper are: supr-con
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The categories of this paper are: acc-phys
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The categories of this paper are: chem-ph
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The categories of this paper are: solv-int
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The categories of this paper are: eess
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The categories of this paper are: patt-sol
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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: alg-geom
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The categories of this paper are: quant-ph
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The categories of this paper are: atom-ph