Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The concordance invariant tau in link grid homology   We introduce a generalization of the Ozsv\'ath-Szab\'o $\tau$-invariant to
links by studying a filtered version of link grid homology. We prove that this
invariant remains unchanged under strong concordance and we show that it
produces a lower bound for the slice genus of a link. We show that this bound
is sharp for torus links and we also give an application to Legendrian link
invariants in the standard contact 3-sphere.

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The categories of this paper are: q-bio
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The categories of this paper are: plasm-ph
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The categories of this paper are: funct-an
30
The categories of this paper are: q-alg
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The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
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The categories of this paper are: physics
32
The categories of this paper are: atom-ph
34
The categories of this paper are: chem-ph
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The categories of this paper are: hep-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: nlin
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The categories of this paper are: comp-gas
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The categories of this paper are: adap-org
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The categories of this paper are: mtrl-th
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The categories of this paper are: cs