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INFINITE SIMPLE (2, 3, n)-GROUPS AND CONGRUENCE HULLS IN THE MODULAR GROUP
Published online by Cambridge University Press: 01 July 1999
Abstract
We prove that if n>66 and (n, 30) = 1, then there exist uncountably many infinite simple (2, 3, n)- groups, that is, groups generated by a pair of elements x, y, say, where the orders of x, y and xy are 2, 3 and n, respectively. This extends previous results of Schupp and the authors.
These results are used to prove the existence of subgroups of the modular group with special arithmetic properties.
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- © The London Mathematical Society 1999
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