On the existence of a Gysin morphism for the Blow-up of an ordinary singularity |
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| Authors: | Vincenzo Di Gennaro Davide Franco |
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| Affiliation: | 1.Dipartimento di Matematica,Università di Roma “Tor Vergata”,Roma,Italy;2.Dipartimento di Matematica e Applicazioni “R. Caccioppoli”,Università di Napoli “Federico II”,Napoli,Italy |
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| Abstract: | In this paper we characterize the Blowing-up maps of ordinary singularities for which there exists a natural Gysin morphism, i.e. a bivariant class (theta in Hom_{D(Y)}(Rpi _*mathbb {Q}_X, mathbb {Q}_Y)), compatible with pullback and with restriction to the complement of the singularity. |
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