mm ung ▁von ▁N iveau kur ven ▁bei ▁der ▁kon form en ▁Abb ild ung ▁ein fach z usammen häng ender ▁Gebiet e ▁auf ▁das ▁Inn ere ▁eines ▁Kre ises ; ▁eine ▁Ver all geme iner ung ▁eines ▁S atz es ▁von ▁E . ▁Study ▁(" On ▁the ▁curv ature ▁of ▁level ▁curves ▁of ▁the ▁conform al ▁mapping ▁of ▁simply ▁connected ▁domains ▁to ▁the ▁interior ▁of ▁a ▁circle : ▁A ▁general ization ▁of ▁a ▁theorem ▁of ▁Edu ard ▁Study "). ▁ ▁This ▁was ▁followed ▁by ▁some ▁years ▁spent ▁working ▁as ▁an ▁assistant ▁with ▁Robert ▁König ▁in ▁J ena ▁and ▁Heinrich ▁Be hn ke ▁in ▁Mün ster . ▁ ▁He ▁hab il itated ▁in ▁ 1 9 3 5 ▁at ▁the ▁University ▁of ▁J ena . ▁P esch l ▁took ▁up ▁a ▁visit ing ▁professor ship ▁at ▁the ▁University ▁of ▁Bonn ▁in ▁ 1 9 3 8 , ▁and ▁was ▁subsequently ▁promoted ▁to ▁extraordinary ▁professor ▁there . ▁ ▁Under ▁pressure ▁P esch l ▁became ▁a ▁member ▁of ▁the ▁Naz i ▁Party ▁and ▁the ▁par amil it ary ▁St urm ab teilung , ▁but ▁he ▁avoided ▁any ▁activity ▁within ▁either ▁organization ▁and ▁ended ▁SA ▁service ▁after ▁a ▁year . ▁From ▁ 1 9 4 1 ▁to ▁ 1 9 4 3 ▁he ▁was ▁draft ed ▁as ▁a ▁French ▁interpreter ▁for ▁the ▁We hr macht . ▁From ▁ 1 9 4 3 ▁to ▁ 1 9 4 5 ▁he ▁worked ▁at ▁the ▁German ▁A viation ▁Research ▁Institute ▁in ▁Brun sw ick , ▁which ▁ex empt ed