an:04163054
Zbl 0708.14016
Elkies, Noam D.
The automorphism group of the modular curve \(X_ 0(63)\)
EN
Compos. Math. 74, No. 2, 203-208 (1990).
00155461
1990
j
14G35 14H45 14E07
automorphism group of modular curve
The author determines the automorphism group of the (compactified) modular curve \(X_ 0(N)\) for \(N=63\). In this case not all automorphisms come from the normalizer of \(\Gamma_ 0(N)\) in \(PSL_ 2({\mathbb{R}})\). For all other values of N the automorphism group was determined by \textit{M. A. Kenku} and \textit{F. Momose} in Compos. Math. 65, No.1, 51-80 (1988; Zbl 0686.14035)].
R.Pink
Zbl 0686.14035