Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Differential $KO$-theory via gradations and mass terms   We construct models of the differential $KO$-theory and the twisted
differential $KO$-theory, by refining Karoubi's $KO$-theory [Kar78] in terms of
gradations on Clifford modules. In order for this, we set up the generalized
Clifford superconnection formalism which generalizes the Quillen's
superconnection formalism [Qui85]. One of our models can be regarded as
classifying "fermionic mass terms" in physics.

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The categories of this paper are: econ
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The categories of this paper are: alg-geom
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The categories of this paper are: stat
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The categories of this paper are: plasm-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: q-fin
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The categories of this paper are: chem-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: nucl-th
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The categories of this paper are: bayes-an
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The categories of this paper are: nucl-ex
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The categories of this paper are: mtrl-th
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The categories of this paper are: hep-ex
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The categories of this paper are: q-alg
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The categories of this paper are: dg-ga
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The categories of this paper are: quant-ph