Resumen de Fibring the complement of the Fenn-Rolfsen link

Roger Fenn

• In this note it is shown that the complement of the singular linked spheres in four dimensions defined by Fenn and Rolfsen can be fibred by tori.

  Also a symmetry between the two components is revealed which shows that the image provides an example of a Spanier-Whitehead duality. This provides an immediate proof that the a-invariant is non zero.