st - century ▁Japanese ▁scient ists <0x0A> </s> ▁The ▁ 1 9 9 9 – 2 0 0 0 ▁s no oker ▁season ▁was ▁a ▁series ▁of ▁s no oker ▁tournament s ▁played ▁between ▁ 2 3   J uly ▁ 1 9 9 9 ▁and ▁ 2 8   May ▁ 2 0 0 0 . ▁The ▁following ▁table ▁out lines ▁the ▁results ▁for ▁ranking ▁events ▁and ▁the ▁inv it ational ▁events . ▁__ TO C __ ▁ ▁Calendar ▁ ▁Official ▁rank ings ▁▁ ▁The ▁top ▁ 1 6 ▁of ▁the ▁world ▁rank ings , ▁these ▁players ▁automatically ▁played ▁in ▁the ▁final ▁r ounds ▁of ▁the ▁world ▁ranking ▁events ▁and ▁were ▁invited ▁for ▁the ▁Masters . ▁ ▁Notes ▁ ▁References ▁ ▁External ▁links ▁▁▁▁ 1 9 9 9 ▁Season ▁ 2 0 0 0 ▁Season ▁ 1 9 9 9 <0x0A> </s> ▁Peter ▁de ▁R ivo ▁( P et rus ) ▁( A al st ▁ca . ▁ 1 4 2 0 ▁- ▁Le u ven ▁ 1 4 9 9 ) ▁was ▁a ▁F lem ish ▁sch ol astic ▁phil os opher , ▁teaching ▁at ▁the ▁Catholic ▁University ▁of ▁Le u ven . ▁ ▁His ▁views ▁on ▁future ▁cont ing ents ▁were ▁controvers ial , ▁being ▁opposed ▁by ▁Henry ▁of ▁Z om eren , ▁also ▁at ▁Le u ven ▁( F rench : ▁Lou v ain ). ▁De ▁R ivo ▁went ▁to ▁Rome ▁in ▁ 1 4 7 2 ▁to ▁defend ▁his ▁views ▁to ▁Pope ▁Si xt us ▁IV ; ▁they