Classification of orientable torus bundles over closed orientable surfaces

Naohiko Kasuya, Issei Noda

Let $g$ be a non-negative integer, $\hat{I}{\pounds }_g$ a closed orientable surface of genus $g$, and ${\mathcal{M}}_g$ its mapping class group. We classify all the group homomorphisms $π_1(Σ_g)…