Abstract
This paper gives an informal overview over applications of compression techniques in algorithmic group theory.
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Notes
- 1.
These are the one-relator groups \(\mathsf {BS}(p,q) = \langle a,t \mid t^{-1} a^p t = a^q \rangle \).
- 2.
In fact, \(\mathsf {PSPACE}\)-hardness of the compressed word problem for \(G \wr \mathbb {Z}\) holds for a quite large class of non-solvable groups, namely all so-called uniformly SENS groups G [8], whereas for every non-abelian group G, the compressed word problem for \(G \wr \mathbb {Z}\) is already \(\mathsf {coNP}\)-hard [43].
- 3.
\(\mathsf {coNP}\)-hardness holds for every uniformly SENS group G.
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Lohrey, M. (2021). Compression Techniques in Group Theory. In: De Mol, L., Weiermann, A., Manea, F., Fernández-Duque, D. (eds) Connecting with Computability. CiE 2021. Lecture Notes in Computer Science(), vol 12813. Springer, Cham. https://doi.org/10.1007/978-3-030-80049-9_30
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