Precision Cosmology and Hubble tension in the era of LSS surveys
  We present a fully relativistic framework to evaluate the impact of
stochastic inhomogeneities on the prediction of the Hubble-Lema\^itre diagram.
In this regard, we relate the fluctuations of the luminosity distance-redshift
relation in the Cosmic Concordance model to the intrinsic uncertainty
associated to the estimation of cosmological parameters from high-redshift
surveys (up to z = 4). Within this framework and according to the specific of
forthcoming surveys as Euclid Deep Survey and LSST, we show that the cosmic
variance associated with the measurement of the Hubble constant will not exceed
0.1 $\%$. Thanks to our results, we infer that deep surveys will provide an
estimation of the the Hubble constant $H_0$ which will be more precise than the
one obtained from local sources, at least in regard of the intrinsic
uncertainty related to a stochastic distribution of inhomogeneities.
