Signatures of Surface Bundles and Stable Commutator Lengths of Dehn Twists
Signatures of Surface Bundles and Stable Commutator Lengths of Dehn Twists
The first aim of this paper is to give four types of examples of surface bundles over surfaces with non-zero signature. The first example is with base genus 2, a prescribed signature, a 0-section and the fiber genus greater than a certain number which depends on the signature. This provides …