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20002008
most citedA proof of the Gap Labeling Conjecture

1 citations · 2 across the 4 of their papers we have counts for

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math.KT2007

Hopf algebroids and secondary characteristic classes

Jerome Kaminker, Xiang Tang

We study a Hopf algebroid, $\calh$, naturally associated to the groupoid . We show that classes in the Hopf cyclic cohomology of $\calh$ can be used to define sec…