INTRICACIES OF SIMPLE WORD EQUATIONS: AN EXAMPLE

Author:

CZEIZLER ELENA1,HOLUB ŠTĚPÁN2,KARHUMÄKI JUHANI3,LAINE MARKKU3

Affiliation:

1. Department of Mathematics and Turku Centre for Computer Science, University of Turku, Joukahaisenkatu 3–5 B, 6th floor, Turku, 20520, Finland

2. Department of Algebra, Charles University in Prague, Sokolovska 83, Praha 8, 186 75, Czech Republic

3. Department of Mathematics and Turku Centre for Computer Science, University of Turku, Turku, 20014, Finland

Abstract

As is well known, simple word equations can be very tedious to solve, often requiring specific ad hoc methods. We illustrate this by giving an example of an equation over four unknowns, having only periodic solutions, but for which showing this is not at all obvious.

Publisher

World Scientific Pub Co Pte Lt

Subject

Computer Science (miscellaneous)

Reference10 articles.

1. Combinatorics of Words

2. On the equality sets for homomorphisms on free monoids with two generators

3. V. Diekert, Algebraic Combinatorics on Words, ed. M. Lothaire (Cambridge University Press, 2002) pp. 387–442.

4. The Equation xi = yjzk in a Free Semigroup

5. Binary equality sets are generated by two words

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