Hans Frederick Blichfeldt

Hans Frederick Blichfeldt (9 January 1873 Illar, Denmark – 16 November 1945 Palo Alto, California) was a Danish and American mathematician who worked on group theory and the geometry of numbers. He introduced Blichfeldt's principle and Blichfeldt's upper bound on the density of sphere packings.

References

Dickson, L. E. (1947), "Obituary: Hans Frederik Blichfeldt. 1873--1945", Bulletin of the American Mathematical Society 53: 882–883, doi:10.1090/S0002-9904-1947-08874-1, ISSN 0002-9904, MR0021508
Miller, G H (2008), "Blichfeldt, Hans Frederick", Dictionary of Scientific Biography (New York 1970-1990)
O'Connor, John J.; Robertson, Edmund F., "Hans Frederick Blichfeldt", MacTutor History of Mathematics archive, University of St Andrews.
Zong, Chuanming (1999), "Chapter 6.4 Hans Frederick Blichfeldt", Sphere packings, Universitext, Berlin, New York: Springer-Verlag, ISBN 978-0-387-98794-1, MR1707318
Hans Frederick Blichfeldt at the Mathematics Genealogy Project