Jacobus Verhoeff

Jacobus 'Koos' Verhoeff
Born	(1927-02-20) 20 February 1927 The Hague
Nationality	Dutch
Alma mater	University of Amsterdam
Known for	Error detecting codes
Scientific career
Fields	Mathematics, Computer science
Institutions	Delft University of Technology, Philips, Erasmus University Rotterdam
Thesis	Error Detecting Decimal Codes  (1969)
Doctoral advisor	Adriaan van Wijngaarden, Wouter Peremans

Jacobus "Koos" Verhoeff (born 1927) is a Dutch mathematician, computer scientist, and artist. He is known for his work on error detection and correction, and worked on information retrieval. He has also held exhibitions of his mathematically inspired sculptures. He is now retired.

He is best known for his check-digit Verhoeff algorithm, which is based on the dihedral group of order 10.

He is the father of Tom Verhoeff, also a mathematician and computer scientist.

Selected publications

• Verhoeff, J. (1977). "A New Data Compression Technique". Annals of Systems Research. 6. Springer US: 139–148. doi:10.1007/978-1-4613-4074-4_8.
• Verhoeff, Jacobus (1969). Error detecting decimal codes (Ph.D.). Mathematical Centre, Amsterdam.
• Verhoeff, J. (April 1970). "Wiskundige aspecten van het Nederlandse administratienummer voor personen (Mathematical aspects of the Dutch administration number for persons)". Informatie, maandblad voor informatieverwerking (in Dutch). 12 (4): 162–169.
• Verhoeff, Jacobus; Goffman, W; Belzer, Jack. "Inefficiency of the use of boolean functions for information retrieval systems". Communications of the ACM. 4 (12). Association for Computing Machinery: 557–558. doi:10.1145/366853.366861.
• Verhoeff, J. (1953). "Recent investigations about the radical of a ring". Rapport ZW. 1953–007. Math. Centrum Amsterdam.
• Verhoeff, J. "On pseudo-convergent sequences". Nederl. Akad. Wetensch. Proc. Ser. A., (Indagationes Math.). 15 (401–404).