▁Pir ates ▁( 1 9 6 0 ) ▁ ▁References ▁ ▁External ▁links ▁▁▁▁▁▁ ▁Category : 1 9 0 4 ▁birth s ▁Category : 1 9 7 5 ▁death s ▁Category : 2 0 th - century ▁Italian ▁male ▁actors ▁Category : Ital ian ▁male ▁film ▁actors ▁Category : Ital ian ▁male ▁stage ▁actors ▁Category : Pe ople ▁from ▁Rome <0x0A> </s> ▁This ▁is ▁a ▁list ▁of ▁things ▁named ▁after ▁George ▁B idd ell ▁Air y , ▁a ▁ 1 9 th - century ▁math ematic ian ▁and ▁astronom er . ▁ ▁Mathemat ics ▁and ▁related ▁physics ▁concepts ▁▁ ▁Air y ▁beam ▁ ▁Air y ▁disc ▁▁ ▁Air y ▁differential ▁equation ▁ ▁Air y ▁functions ▁A i ( x ) ▁and ▁Bi ( x ) ▁▁ ▁Air y ▁points . ▁ ▁Air y ▁stress ▁functions ▁ ▁Air y ▁transform ▁ ▁Air y ▁wave ▁theory . ▁ ▁Air y ▁z eta ▁function ▁ ▁Astronom y ▁and ▁ge osci ences ▁ ▁Air y – He isk an en ▁model , ▁see ▁" A iry ▁hypothesis ". ▁▁ ▁Air y , ▁a ▁cr ater ▁on ▁Mars . ▁▁ ▁Air y - 0 , ▁another ▁smaller ▁cr ater , ▁whose ▁location ▁within ▁Air y , ▁defines ▁the ▁prime ▁mer id ian ▁of ▁that ▁planet . ▁ ▁Air y ▁( l un ar ▁cr ater ) ▁named ▁in ▁his ▁honour . ▁ ▁Air y ▁elli ps oid ▁ ▁Air y ▁hypothesis ▁ ▁Air y ▁Mean ▁Time ▁ ▁Air y ▁projection ▁ ▁Air y ▁Trans it ▁Circle ▁ ▁Other