Abstract
We prove that the handlebody subgroup of the Torelli group of an orientable surface is generated by genus one BP-maps . As an application, we give a normal generating set for the handlebody subgroup of the level d mapping class group of an orientable surface.
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Acknowledgements
The author would like to express his gratitude to Hisaaki Endo, for his encouragement and helpful advices. The author also wishes to thank Susumu Hirose and Wolfgang Pitsch for their comments and helpful advices. This work was supported by JST CREST Grant Number JPMJCR17J4, Japan.
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Omori, G. A small normal generating set for the handlebody subgroup of the Torelli group. Geom Dedicata 201, 353–367 (2019). https://doi.org/10.1007/s10711-018-0396-4
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DOI: https://doi.org/10.1007/s10711-018-0396-4