SURFACE BUNDLES OVER SURFACES WITH A FIXED SIGNATURE
SURFACE BUNDLES OVER SURFACES WITH A FIXED SIGNATURE
The signature of a surface bundle over a surface is known to be divisible by 4. It is also known that the signature vanishes if the fiber genus <TEX>${\leq}2$</TEX> or the base genus <TEX>${\leq}1$</TEX>. In this article, we construct new smooth 4-manifolds with signature 4 which are surface bundles over …