The total number of participants is limited due to space restrictions. Priority will be given to members of the HoloGrav network but other scientists working in the area of research covered by the network may apply as well. Early registration is recommended. Warning : we are about to reach the maximum number of allowed participants. Registrations received after January 25 will not automatically guarantee the participation to the conference. We kindly ask those who register after this date to wait for a confirmation letter from the organizing committee. Coffee breaks and lunches are offered at GGI. A social dinner and a welcome reception will be offered too.