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Please add useful comments here-- Cronholm144 07:23, 24 May 2007 (UTC) See my comment on principal congruence subgroups on the discussion page. Katzmik 09:14, 2 August 2007 (UTC) |
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The article does not make a distinction between principal congruence subgroups (which is what is discussed here apparently) and more general congruence subgroups. Katzmik 08:04, 2 August 2007 (UTC)
- Yes, it would be useful to expand and clarify. Charles Matthews 02:42, 4 August 2007 (UTC)
