Apollonius of Perga
There is an unpublished manuscript by Ricci, devoted to algebra, in the library of the Mathematical Institute of Genoa. It shows that by 1640 he was familiar with the 'New Algebra' of François Viète. In this book he provides a critique of the solutions given by the geometer Marino Ghetaldi of Ragusa in his "De Resolutione et Compositione Matematica" to the problems posed by Apollonius of Perga.