Axisymmetric multiwormholes revisited

Understand

The construction of stationary axisymmetric multiwormhole solutions to gravitating field theories admitting toroidal reductions to three-dimensional gravitating sigma models is reviewed.

• We show that, as in the multi-black hole case, strut singularities always appear in this construction, except for very special configurations with an odd number of centers.
• We also review the analytical continuation of the multicenter solution across the $n$ cuts associated with the wormhole mouths.
• The resulting Riemann manifold has $2^n$ sheets interconnected by $2^{n-1}n$ wormholes.