Abstract
Let S and G denote respectively the \(2-\)torus and one of the Lie groups \(\mathrm {GL}(n,\mathbb {C}),\) \(\mathrm {SL}(n,\mathbb {C}),\) \(\mathrm {SO}(n,\mathbb {C}),\) \(\mathrm {Sp}(2n,\mathbb {C}).\) In the present article, we consider the smooth part of the representation variety \( \mathrm {Rep}(S,G) \) consisting of conjugacy classes of homomorphisms from fundamental group \(\pi _1(S)\) to G. We show the well definiteness of Reidemeister torsion for such representations. In addition, we establish a formula for computing the Reidemeister torsion of such representations in terms of the symplectic structure on \(\text {Rep}\left( S ,G\right) \) [51]. This symplectic form is analogous to Atiyah–Bott–Goldman symplectic form of higher genera for the Lie group G.
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Hezenci, F., Sozen, Y. (2021). A Note on Representation Variety of Abelian Groups and Reidemeister Torsion. In: Ashyralyev, A., Kalmenov, T.S., Ruzhansky, M.V., Sadybekov, M.A., Suragan, D. (eds) Functional Analysis in Interdisciplinary Applications—II. ICAAM 2018. Springer Proceedings in Mathematics & Statistics, vol 351. Springer, Cham. https://doi.org/10.1007/978-3-030-69292-6_13
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