Evidence of a decreasing trend for the Hubble constant

The current discrepancy between the Hubble constant, H 0 , derived from local distance ladder and cosmic microwave background is one of most crucial issues in cosmology, as it may possibly indicate unknown systematics or new physics. Here, we present a novel non-parametric method to estimate constant function redshift. We establish independent estimates evolution by diagonalizing covariance matrix. From type Ia supernovae, baryon acoustic oscillation data observed parameter data, decreasing trend with significance 5.6 σ confidence level found. At low redshift, its value dramatically consistent that measured drops at high Our results relieve tension, preference for recent solutions, especially respect