Modular knots, automorphic forms, and the Rademacher symbols for triangle groups
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É. Ghys proved that the linking numbers of modular knots and the "missing" trefoil K 2 , 3 in S 3 coincide with the values of a highly ubiquitous function called the Rademacher symbol for SL 2 Z . In this article, we replace SL 2 Z = Γ 2 , 3 by ... ...
