Simplified broken Lefschetz fibrations and trisections of 4-manifolds

R. Inanc Baykur; Osamu Saeki

doi:10.1073/pnas.1717175115

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arXiv · 1710.06529

Simplified broken Lefschetz fibrations and trisections of 4-manifolds

R. Inanc Baykur·Osamu Saeki

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Abstract

Shapes of four dimensional spaces can be studied effectively via maps to standard surfaces. We explain, and illustrate by quintessential examples, how to simplify such generic maps on 4-manifolds topologically, in order to derive simple decompositions into much better understood manifold pieces. Our methods not only allow us to produce various interesting families of examples, but also to establish a correspondence between simplified broken Lefschetz fibrations and simplified trisections of closed, oriented 4-manifolds.

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R. Inanc Baykur, Osamu Saeki. 2017-10-17. Simplified broken Lefschetz fibrations and trisections of 4-manifolds. https://doi.org/10.1073/pnas.1717175115

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