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# Axel Thue

Axel Thue (19 February 1863 – 7 March 1922) was a Norwegian mathematician, known for highly original work in diophantine approximation, and combinatorics.

Axel Thue

He stated in 1914 the so-called word problem for semigroups or Thue problem, closely related to the halting problem.

His only known PhD student was Thoralf Skolem.

The esoteric programming language Thue is named after him.

See also

Semi-Thue system

Thue-Morse sequence

Thue-Siegel-Roth theorem

Thue equation

Thue programming language

Thue's theorem

Word Problem

Publications

Thue, A. (1909), "Über Annäherungswerte algebraischer Zahlen", Journal für die reine und angewandte Mathematik 135: 284–305, ISSN 0075-4102

External links

O'Connor, John J.; Robertson, Edmund F., "Axel Thue", MacTutor History of Mathematics archive, University of St Andrews.

Axel Thue at the Mathematics Genealogy Project

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