To solve the problem of who the author of the Skhalitapramathanayuktāhetusiddhi (SPHYS) was, is a very difficult task. In order to fix a starting point, however, let us begin by admitting that his name was really Āryadeva, as is referred in all the colophons.1 Moreover, I take for granted that he was a later namesake… Continue reading ♦ The third Āryadeva!