A Hennings type invariant of $3$-manifolds from a topological Hopf superalgebra

Abstract

We prove the unrolled superalgebra ${\mathcal{U}}_{\xi }^H\mathfrak{sl}(2|1)$ has a completion which is a ribbon superalgebra in a topological sense where $\xi$ is a root of unity of odd order. Using this ribbon superalgebra we construct its universal invariant of links. We use it to construct an invariant of $3$-manifolds of Hennings type.