  The space of homomorphisms from a projective object to a Verma module in
category O inherits an induced filtration from the Jantzen filtration on the
Verma module. On the other hand there is the Andersen filtration on the space
of homomorphisms from a Verma module to a tilting module as described in
[Soe07]. The tilting equivalence from [Soe98] induces an isomorphism of these
kinds of Hom-spaces. We will show that this equivalence even identifies both
filtrations.
