Isospectral Alexandrov Spaces
  We construct the first non-trivial examples of compact non-isometric Alexandrov spaces which are isospectral with respect to the Laplacian and not isometric to Riemannian orbifolds. This construction generalizes independent earlier results by the authors based on Schueth's version of the torus method. 
Alexander Engel, Martin Weilandt
math.DG