  Studies of the Universe's transition to smoothness in the context of LCDM
have all pointed to a transition radius no larger than ~300 Mpc. These are
based on a broad array of tracers for the matter power spectrum, including
galaxies, clusters, quasars, the Ly-alpha forest and anisotropies in the cosmic
microwave background. It is therefore surprising, if not anomalous, to find
many structures extending out over scales as large as ~2 Gpc, roughly an order
of magnitude greater than expected. Such a disparity suggests that new physics
may be contributing to the formation of large-scale structure, warranting a
consideration of the alternative FLRW cosmology known as the $R_h=ct$ universe.
This model has successfully eliminated many other problems in LCDM. In this
paper, we calculate the fractal (or Hausdorff) dimension in this cosmology as a
function of distance, showing a transition to smoothness at ~2.2 Gpc, fully
accommodating all of the giant structures seen thus far. This outcome adds
further observational support for R_h=ct over the standard model.
