Abstract
The structure of A and B radio components at the milliarcsecond level is examined on the basis of two 18-cm Mark III VLBI observations of the 2016 + 112 gravitational lens system. One hypothesis consistent with all of the numerous models considered is that images A and B are not related by linear magnification because the source is evolving on a time scale comparable to or shorter than the time delay between images. Models not required to be consistent with linear magnification are not. Models required to be consistent with linear magnification either fit the data significantly less well or indicate significantly different matrices for the two epochs.
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