Sangrok Oh

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math.GR2026

From algebraic orthogonality to RAAG embedding obstructions in hierarchically hyperbolic groups

Sangrok Oh, Jihoon Park

We introduce the $expanded core graph$ , which records minimal unbounded domains and their axial directions, for two classes of hierarchically hyperbolic group structures m…

math.GR2025

Embeddability of right-angled Artin groups into hierarchically hyperbolic groups

Sangrok Oh, Jihoon Park

For a hierarchically hyperbolic group, we give sufficient conditions ensuring that suitable powers of a finite collection of elements generate a right-angled Artin subgroup; under…

math.GR2025

Quasi-isometry classification of certain graph $2$ -braid groups and its applications

Byung Hee An, Sangrok Oh

In \cite{Oh22}, the second author defined a complex of groups decomposition of the fundamental group of a finitely generated 2-dimensional special group, called an \emph{intersecti…

From algebraic orthogonality to RAAG embedding obstructions in hierarchically hyperbolic groups

Embeddability of right-angled Artin groups into hierarchically hyperbolic groups

Quasi-isometry classification of certain graph 2-braid groups and its applications

Quasi-isometry classification of certain graph $2$ -braid groups and its applications