Almost paracontact manifolds of an odd dimension having an almost paracomplex
structure on the paracontact distribution are studied. The components of the
fundamental (0,3)-tensor, derived by the covariant derivative of the structure
endomorphism and the metric on the considered manifolds in each of the basic
classes, are obtained. Then, the case of the lowest dimension 3 of these
manifolds is considered. An associated tensor of the Nijenhuis tensor is
introduced and the studied manifolds are characterized with respect to this
pair of tensors. Moreover, cases of paracontact and para-Sasakian types are
commented. A family of examples is given.Comment: 18 pages, 2 table
