RT Book, Section T1 The arithmeticity of the figure eight knot orbifolds A1 Hilden, Hugh Michael A1 Lozano Imízcoz, María Teresa A1 Montesinos Amilibia, José María A2 Apanasov, Boris A2 Neumann, Walter D. A2 Reid, Alan W. A2 Siebenmann, Laurent AB Continuing their investigation [in Topology '90 (Columbus, OH, 1990), 133–167, de Gruyter, Berlin, 1992;] of the problem of how rarely a hyperbolic orbifold is arithmetic, the authors classify the arithmetic figure eight orbifolds: there are exactly six among the hyperbolic figure eight orbifolds (K,n), n>3. This relies on work by H. Helling, A. C. Kim and J. L. Mennicke ["On Fibonacci groups'', Preprint; per bibl.] and extends a recent result of A. Reid [J. London Math. Soc. (2) 43 (1991), no. 1, 171–184;] that (K,∞) is the only arithmetic knot complement. PB Walter de Gruyter & Co SN 3-11-012598-6 YR 1992 FD 1992 LK https://hdl.handle.net/20.500.14352/60746 UL https://hdl.handle.net/20.500.14352/60746 NO Papers from the Research Semester in Low-dimensional Topology held at Ohio State University, Columbus, Ohio, February–June 1990. DS Docta Complutense RD 6 abr 2025