Dr. Olga Varghese

Topics in Mathematics Münster

Research Interests

$\bullet$ Geometric group theory
$\bullet$ profinite rigidity
$\bullet$ Automatic continuity

• Corson, M. S.; Hughes, S.; Möller, P.; Varghese, O. Higman-Thompson groups and profinite properties of right-angled Coxeter groups. Selecta Mathematica (New Series), 2026 online
• Varghese, Olga Coxeter quotients of the automorphism group of a Coxeter group. Algebraic and Geometric Topology, 2026 online
• Corson, S.M.; Hughes, S.; Möller, P.; Varghese, O. Profinite rigidity of affine Coxeter Groups. Mathematische Zeitschrift Vol. 311 (11), 2025 online
• Corson, S. M.; Olshanskii, A.; Varghese, O. Steep uncountable groups. Bulletin of the London Mathematical Society Vol. 56 (2), 2024 online
• Möller, Philip: Varghese, Olga On quotients of Coxeter groups. Journal of Algebra Vol. 639, 2024 online
• Paris, Luis; Varghese, Olga The spherical growth series of Dyer groups. Proceedings of the Edinburgh Mathematical Society Vol. 67 (1), 2024 online
• Möller, Philip; Paris, Luis; Varghese, Olga On parabolic subgroups of Artin groups. Israel Journal of Mathematics Vol. 261, 2024 online
• Corson, S. M.; Varghese, O. A Nunke type classification in the locally compact setting. Journal of Algebra Vol. 563, 2020 online
• Kramer, Linus; Varghese, Olga Abstract homomorphisms from locally compact groups to discrete groups. Journal of Algebra Vol. 538, 2019 online
• Varghese Olga Fixed points for actions of Aut(Fn ) on CAT(0) spaces. Münster Journal of Mathematics Vol. 7, 2014, pp 439-462 online

Recent Publications of Dr. Olga Varghese

$\bullet $ Olga Varghese. On the derived length of Dyer groups. arXiv e-prints, December 2025. arXiv:2512.16782.

$\bullet $ Samuel M. Corson, Sam Hughes, Philip Möller, and Olga Varghese. Profinite rigidity of affine Coxeter groups. Mathematische Zeitschrift, July 2025. doi:10.1007/s00209-025-03799-3.

$\bullet $ Sam Hughes, Philip Möller, and Olga Varghese. Profinite properties of coxeter groups. arXiv e-prints, May 2025. arXiv:2505.08701.

$\bullet $ Anna Reimann, Yuri Santos Rego, Petra Schwer, and Olga Varghese. Involutions in Coxeter groups. Algebras and Representation Theory, 28(2):647–667, April 2025. doi:10.1007/s10468-025-10332-x.

$\bullet $ Philip Möller and Olga Varghese. On normal subgroups in automorphism groups. Journal of Group Theory, June 2024. doi:10.1515/jgth-2023-0089.

$\bullet $ Philip Möller and Olga Varghese. On quotients of Coxeter groups. Journal of Algebra, 639:516–531, February 2024. doi:10.1016/j.jalgebra.2023.09.048.

$\bullet $ Luis Paris and Olga Varghese. The spherical growth series of Dyer groups. Proceedings of the Edinburgh Mathematical Society, 67(1):168–187, December 2023. doi:10.1017/s0013091523000743.

$\bullet $ Philip Möller, Luis Paris, and Olga Varghese. On parabolic subgroups of Artin groups. Israel Journal of Mathematics, 261(2):809–840, December 2023. doi:10.1007/s11856-023-2597-2.

$\bullet $ Samuel M. Corson, Alexander Olshanskii, and Olga Varghese. Steep uncountable groups. Bulletin of the London Mathematical Society, 56(2):701–710, November 2023. doi:10.1112/blms.12959.

$\bullet $ Luis Paris and Olga Varghese. Narrow normal subgroups of Coxeter groups and of automorphism groups of Coxeter groups. Journal of Group Theory, 27(2):255–274, October 2023. doi:10.1515/jgth-2022-0202.

$\bullet $ Samuel M. Corson, Sam Hughes, Philip Möller, and Olga Varghese. Higman-Thompson groups and profinite properties of right-angled Coxeter groups. arXiv e-prints, September 2023. arXiv:2309.06213.

$\bullet $ Luis Paris and Olga Varghese. The growth series of Dyer groups. arXiv e-prints, May 2023. arXiv:2305.09796.

$\bullet $ Daniel Keppeler, Philip Möller, and Olga Varghese. Automatic continuity for groups whose torsion subgroups are small. J. Group Theory, 25(6):1017–1043, November 2022. doi:10.1515/jgth-2021-0105.

$\bullet $ Philip Möller and Olga Varghese. A note on semicompleteness of graph products of abelian groups. Communications in Algebra, 51(3):902–914, September 2022. doi:10.1080/00927872.2022.2115507.

$\bullet $ Philip Möller and Olga Varghese. Abstract group actions of locally compact groups on CAT(0) spaces. Groups Geom. Dyn., 16(3):863–887, August 2022. doi:10.4171/ggd/677.

$\bullet $ Daniel Keppeler, Philip Möller, and Olga Varghese. Automatic continuity for groups whose torsion subgroups are small. arXiv e-prints, June 2021. arXiv:2106.12547.

$\bullet $ Samuel M. Corson and Olga Varghese. A Nunke type classification in the locally compact setting. J. Algebra, 563:49–52, December 2020. doi:10.1016/j.jalgebra.2020.07.011.

$\bullet $ Anthony Genevois and Olga Varghese. Conjugating automorphisms of graph products: Kazhdan's property (T) and SQ-universality. Bull. Aust. Math. Soc., 101(2):272–282, April 2020. doi:10.1017/s0004972719000844.

$\bullet $ Olga Varghese. Coxeter quotients of the automorphism group of a Coxeter group. arXiv e-prints, March 2020. arXiv:2003.04111v1.

$\bullet $ Olga Varghese. On number of ends of graph products of groups. Commun. Algebra, pages 1–10, January 2020. doi:10.1080/00927872.2020.1714637.

$\bullet $ Nils Leder and Olga Varghese. A note on locally elliptic actions on cube complexes. Innovations in Incidence Geometry: Algebraic, Topological and Combinatorial, 18(1):1–6, January 2020. doi:10.2140/iig.2020.18.1.

$\bullet $ Olga Varghese. The automorphism group of the universal Coxeter group. Expo. Math., December 2019. doi:10.1016/j.exmath.2019.09.002.

$\bullet $ Linus Kramer and Olga Varghese. Abstract homomorphisms from locally compact groups to discrete groups. J. Algebra, 538:127–139, November 2019. doi:10.1016/j.jalgebra.2019.07.026.

$\bullet $ Olga Varghese. On hyperbolicity and virtual freeness of automorphism groups. Geometriae Dedicata, October 2019. doi:10.1007/s10711-019-00486-6.

$\bullet $ Olga Varghese. On coherence of graph products of groups and Coxeter groups. Universitext., 342(7):2100–2105, July 2019. doi:10.1016/j.disc.2019.04.014.

$\bullet $ Olga Varghese. Planarity of Cayley graphs of graph products of groups. Universitext., 342(6):1812–1819, June 2019. doi:10.1016/j.disc.2019.02.020.

$\bullet $ Olga Varghese. A condition that prevents groups from acting fixed point free on cube complexes. Geometriae Dedicata, 200(1):85–91, May 2019. doi:10.1007/s10711-018-0361-2.

$\bullet $ Nils Leder and Olga Varghese. On property (T) for automorphism groups of graph products. arXiv e-prints, February 2019. arXiv:1902.04370.

$\bullet $ Olga Varghese. Representations of groups with $\rm CAT $$(0)$ fixed point property. Archiv der Mathematik, 111(3):231–238, June 2018. doi:10.1007/s00013-018-1200-2.

$\bullet $ Olga Varghese. Actions of $\rm SAut$$(F_n)$. Archiv der Mathematik, 110(4):319–325, January 2018. doi:10.1007/s00013-017-1138-9.

$\bullet $ Olga Varghese. Fixed points for actions of $\rm Aut$$(F_n)$ on $\rm CAT $$(0)$ spaces. Münster Journal of Mathematics, 2015. doi:10.17879/58269763367.