Abraham Gotthelf Kästner
Abraham Gotthelf Kästner ( 27 September 1719 – 20 June 1800 ) was a German mathematician and epigrammatist . 
<triplet> Abraham Gotthelf Kästner <subj> 27 September 1719 <obj> date of birth <subj> 20 June 1800 <obj> date of death