Abstract: | In the paper one proves several statements on congruence subgroups in the exceptional Lie group G2(C). having applications in the theory of automorphic functions.Translated from Zapiski Nauchnykh Seminarov Leningradskogo Otdeleniya Matematicheskogo Instituta im. V. A. Steklova Akademii Nauk SSSR, Vol. 183, pp. 124–141, 1990. |