Exotic Stein fillings with arbitrary fundamental group

Anar Akhmedov, Burak Ozbagci

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


Let G be a finitely presentable group. We provide an infinite family of homeomorphic but pairwise non-diffeomorphic, symplectic but non-complex closed 4-manifolds with fundamental group G such that each member of the family admits a Lefschetz fibration of the same genus over the two-sphere. As a corollary, we also show the existence of a contact 3-manifold which admits infinitely many homeomorphic but pairwise non-diffeomorphic Stein fillings such that the fundamental group of each filling is isomorphic to G. Moreover, we observe that the contact 3-manifold above is contactomorphic to the link of some isolated complex surface singularity equipped with its canonical contact structure.

Original languageEnglish (US)
Pages (from-to)265-281
Number of pages17
JournalGeometriae Dedicata
Issue number1
StatePublished - Aug 1 2018

Bibliographical note

Funding Information:
The authors would like to thank the anonymous referee for his careful reading of the manuscript and his/her suggestions that improved the presentation greatly. The authors would also like to thank R. ?. Baykur for helpful comments. The first author was partially supported by the NSF Grant DMS-1005741. The second author was partially supported by a BIDEP-2219 research grant of the Scientific and Technological Research Council of Turkey.

Publisher Copyright:
© 2017, Springer Science+Business Media B.V.


  • Contact structures
  • Exotic manifolds
  • Lefschetz fibrations
  • Stein fillings
  • Symplectic manifolds


Dive into the research topics of 'Exotic Stein fillings with arbitrary fundamental group'. Together they form a unique fingerprint.

Cite this