transfer of share in co ownership

I and my mother own flat in housing society under joint ownership basis. My mother has done nomination in my name and a registered will for transfer of her share in my name. My mother has done registered will wherein it is mentioned her share of property to be transferred in my name and rest of all belongings i.e. gold and ornaments to be given to my elder brother, now My mother is no more, how do i proceed further for transfer of her share in my name.