Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Minimal models, GT-action and formality of the little disk operad   We give a new proof of formality of the operad of little disks. The proof
makes use of an operadic version of a simple formality criterion for
commutative differential graded algebras due to Sullivan. We see that formality
is a direct consequence of the fact that the Grothendieck-Teichm\"uller group
operates on the chain operad of little disks.

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The categories of this paper are: cond-mat
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The categories of this paper are: dg-ga
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The categories of this paper are: nlin
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The categories of this paper are: physics
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The categories of this paper are: hep-lat
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The categories of this paper are: cmp-lg
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The categories of this paper are: econ
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The categories of this paper are: q-fin
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The categories of this paper are: q-alg
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The categories of this paper are: plasm-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: supr-con
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The categories of this paper are: alg-geom
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The categories of this paper are: patt-sol
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The categories of this paper are: bayes-an