Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dynamical Projective Curvature in Gravitation   By using a projective connection over the space of two-dimensional affine
connections, we are able to show that the metric interaction of Polyakov 2D
gravity with a coadjoint element arises naturally through the projective Ricci
tensor. Through the curvature invariants of Thomas-Whitehead, we are able to
define an action that could describe dynamics to the projective connection. We
discuss implications of the projective connection in higher dimensions as
related to gravitation.

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The categories of this paper are: nlin
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The categories of this paper are: econ
4
The categories of this paper are: cond-mat
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The categories of this paper are: acc-phys
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The categories of this paper are: q-bio
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The categories of this paper are: eess
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The categories of this paper are: atom-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: chem-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: stat
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The categories of this paper are: hep-ex
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The categories of this paper are: hep-lat
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The categories of this paper are: ao-sci
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The categories of this paper are: q-alg