The homology of surface diffeomorphism groups and a question of morita

Jonathan Bowden

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3 Citations (Scopus)


We answer a question posed by Morita concerning the non-triviality of certain secondary characteristic classes for surface bundles. In doing so we are naturally led to show that a form of Harer stability holds for surface diffeomorphism groups in homology of small degree.

Original languageEnglish
Pages (from-to)2543-2549
Number of pages7
JournalProceedings of the American Mathematical Society
Issue number7
Publication statusPublished - 2012
Externally publishedYes

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