50-MU-AS RESOLUTION VLBI IMAGES OF AGNS AT LAMBDA-3MM

We present 15 images from the global mm-VLBI sessions in 1990 April at 100 GHz and 1993 April at 86 GHz. These observations probe the centra l engines of the 16 observed AGN's with up to 50 mu as resolution. Amo ng other sources previously observed with lambda 3 mm VLBI we present the first lambda 3 mm maps of 0735+178, 0748+126, 1055+018, 2145+067, and CTA102, in total we have been able to image 13 out of the 16 obser ved sources. 6 out of the 13 imaged sources observed exhibit curvature and rapid structural changes, although the low dynamic range in two t hirds of the maps limits the detection of weak features. Most of the s ources have unresolved cores even at this high resolution. There is su bstantial evidence that the observed sources can be grouped into two g eneral groups: A misaligned population with parsec scale jets in the f orm of low pitch helices and an aligned population with straight jets with small changes in PA due to intrinsic bends.