Quadratic Donaldson-Thomas invariants for $({\mathbb{P}}^1{)}^3$ and some other smooth proper toric threefolds

Marc Levine, Anna M. Viergever

Using virtual localization in Witt sheaf cohomology, we show that the generating series of quadratic Donaldson-Thomas invariants of $({\mathbb{P}}^1{)}^3$, valued in the Witt ring of $…