Erik Ivar Fredholm
Erik Ivar Fredholm ( 7 April 1866 – 17 August 1927 ) was a Swedish mathematician whose work on integral equations and operator theory foreshadowed the theory of Hilbert spaces . 
<triplet> Erik Ivar Fredholm <subj> 17 August 1927 <obj> date of death <subj> integral equation <obj> field of work