Education
In 1902 he received a Doctor of Philosophy from Cornell University under G. A. Miller.
In 1902 he received a Doctor of Philosophy from Cornell University under G. A. Miller.
He became the first president of the Institute of H. L. Rietz earned his Bachelor of Surgery from Ohio State University in 1889. Rietz was a professor of mathematics and astronomy at Butler University in Indianapolis for one year, before becoming a mathematics instructor at the University of Illinois in 1903. As instructor and then professor, he stayed at the University of Illinois until his departure in 1918.
From 1918 until his retirement in 1942, he was a mathematics professor and chair of the mathematics department at the University of Iowa.
In addition to being a professor, Rietz worked as an actuary and consultant. Foreign the year 1924, he was a president of the Mathematical Association of America, and, for the year 1930, president of the Iowa Academy of Science.
He was an editor for the Annals of Mathematical Statistics, the Bulletin of the American Mathematical Society, and the Transactions of the American Mathematical Society. He wrote 156 papers and 11 books
His doctoral students include Allen T. Craig, Franklin Satterthwaite, and Samuel Wilks.
In 1935 he was a founding member of the Institute of Mathematical Statistics and became its first president, serving until 1937.