245 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Osaka City UniversityJP8 papers
- Tokyo Institute of TechnologyJP3 papers
- IkerbasqueES1 paper
- Ioffe InstituteRU1 paper
- Japan Atomic Energy AgencyJP1 paper
- Keio UniversityJP1 paper
- Lagrange LaboratoryFR1 paper
- National Institute of TechnologyJP1 paper
- Okayama UniversityJP1 paper
- Osaka Electro-Communication UniversityJP1 paper
- Rochester Institute of TechnologyUS1 paper
- Simon Fraser UniversityCA1 paper
5 papers · 1 filter
Non-holomorphic Lefschetz fibrations with -sections
Noriyuki Hamada, Ryoma Kobayashi, Naoyuki Monden
We construct two types of non-holomorphic Lefschetz fibrations over with -sections ---hence, they are fiber sum indecomposable--- by giving the corresponding positive r…
A normal generating set for the Torelli group of a compact non-orientable surface
Ryoma Kobayashi
For a compact surface , let denote the Torelli group of . For a compact orientable surface , is generated by BSCC maps and BP maps. For a…
A finite generating set for the level 2 twist subgroup of the mapping class group of a closed non-orientable surface
Ryoma Kobayashi, Genki Omori
We obtain a finite generating set for the level 2 twist subgroup of the mapping class group of a closed non-orientable surface. The generating set consists of crosscap pushing maps…
A normal generating set for the Torelli group of a non-orientable closed surface
Susumu Hirose, Ryoma Kobayashi
For a closed surface , its Torelli group is the subgroup of the mapping class group of consisting of elements acting trivially on . When…
Lefschetz pencils and finitely presented groups
Ryoma Kobayashi, Naoyuki Monden
In this paper, given a finitely presented group , we provide the explicit monodromy of a Lefschetz fibration with -sections whose total space has fundamental group by…