|
Abstract |
A virtue of the special geometry underlying Calabi--Yau 3-manifolds is
the existence of a canonical choice of coordinates for the
corresponding moduli space. In heterotic theories there is no obvious
choice of coordinates and so we should be covariant in discussing
moduli spaces. This necessitates the construction of covariant
derivatives with respect to parameters. Such derivatives are naturally
descried by a universal bundle for heterotic theories. I will discuss
how to do this and what it means geometrically & physically. |
