04 in that area} Algorithms {For numerical algorithms, see 65-XX; for combinat Analysis of algorithms and problem com Cancellation theory; application of van Kampen diagrams [See also 57M05] Combinatorial properties (number of faces, shortest paths, etc.) [See also 05Cxx] Computer graphics Computer science {For papers involving machine computations and programs in a specific mathematical area, see Section Computing methodologies and applications Convex and discrete geometry Generators, relations, and presentations Geometric group theory [See also 05C25, 20E08, 57Mxx] Group theory and generalizations Lenguaje y lenguas-Frecuencia de palabras Polytopes and polyhedra Presentations of groups (Mathematics) Présentations de groupes (Mathématiques) Problèmes des mots (Mathématiques) Representaciones de grupos Special aspects of infinite or finite groups Theory of computing Word problems (Mathematics) Word problems, other decision problems, connections with logic and automata [See also 03B25, 03D05, 03D40, 06B25, 08