doctoral_advisor birth_place nationality fields workplaces birth_date doctoral_students article_title name
mieczysław biernacki wilno , commonwealth of poland poland mathematics wrocław university of technology warsaw university 07 october 1926 anzelm iwanik kazimierz musiał leszek pacholski rastislav telgarsky czesław ryll-nardzewski
 czesław ryll-nardzewski
czesław ryll-nardzewski

czesław ryll-nardzewski -lrb- ; born october 7 , 1926 -rrb- is a polish mathematician .
he was a student of hugo steinhaus .
at the age of 26 he became professor at the warsaw university and in 1959 at the wrocław university of technology .
his main research areas are measure theory , functional analysis , foundations of mathematics and probability theory .
several theorems bear his name : the ryll-nardzewski fixed point theorem , the ryll-nardzewski theorem in model theory , and the kuratowski -- ryll-nardzewski measurable selection theorem .
he is a member of the polish academy of sciences since 1967 .
