On the moduli space of multi-fractional instantons on the twisted ${\mathbb{T}}^4$

Mohamed M. Anber, Andrew A. Cox, Erich Poppitz

The moduli space of self-dual $SU(N)$ Yang-Mills instantons on ${\mathbb{T}}^4$ of topological charge $Q=r/N$, $1\le r\le N-1$, is of current interest, yet is not fully understo…