From osp(1|32)aS center dot osp(1|32) to the M-theory superalgebra: a contraction procedure

摘要

We show the impossibility to obtain the D'auria-Fr,-type superalgebras that allow for an underlying gauge theoretical structure of D = 11 supergravity from the superalgebra osp(1|32)aS center dot osp(1|32)-, by means of aWeimar-Woods contraction.