It can be shown that, if we smooth the A model with a Gaussian prior on the feature weights that is centered at 0 -following the approach in (Chen and Rosenfeld, 2000) for smoothing maximum entropy models -then the MinDiv update equations for estimating A on the adaptation data are identical to the MAP adaptation procedure we proposed 5 .
we wish to point out that the equivalence holds only if the feature set for the new model A is F background ∪ F adapt .