Lower bound for the geometric type from a generalized estimate in the dib-Neumann problem - a new approach by peak functions

We give a simple proof of the fact that an "$f$-estimate" for the $\bar\partial$-Neumann problem implies a lower bound on the geomatric type of the boundary along any complex one dimensional variety. The proof uses the existence of peak functions which is in turn a consequence of the $f$-estimate.