Observational evidence of fractality in the large-scale distribution of
  galaxies
  Using a sample of 133 991 galaxies distributed in the sky region $100^{\circ}
<\alpha<270^{\circ}$ and $7^{\circ}<\delta<65^{\circ}$, extracted from the SDSS
NASA/AMES Value Added Galaxy Catalog (AMES-VAGC), we estimate the fractal
dimension using two different methods. First, using an algorithm to estimate
the correlation dimension. The second method, in a novel approach, creates a
graph from the data and estimates the graph dimension purely from connectivity
information. In both methods we found a dimension $D\approx 2$ in scales below
20 Mpc, which agrees with previous works. This result shows the non-homogeneity
of galaxies distribution at certain scales.
