2 papers
math.GT2019
Genus zero PALF structures on the Akbulut-Yasui plugs
Takuya Ukida
We construct a genus zero PALF structure on each of plugs introduced by Akbulut and Yasui and describe the monodromy as a positive factorization in the mapping class group of a fib…
math.GT2016
Planar Lefschetz fibrations and Stein structures with distinct Ozsvath-Szabo invariants on corks
Cagri Karakurt, Takahiro Oba, Takuya Ukida
Thanks to a result of Lisca and Matic and a refinement by Plamenevskaya, it is known that on a 4-manifold with boundary Stein structures with non-isomorphic Spinc structures induce…