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Dear all,

again I need your help for the following two questions: Suppose we have a triangle group of signature (p,q,\infty).

1) When is such a group unique (up to isomorphism)? 2) Do you have a method how to calculate the trace field of such a group? Is the trace field unique?

Thank you very much for your answer Ali

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Triangle groups - uniqueness and trace field

Dear all,

again I need your help for the following two questions: Suppose we have a triangle group of signature (p,q,\infty).

1) When is such a group unique (up to isomorphism)? 2) Do you a method how to calculate the trace field of such a group?

Thank you very much for your answer Ali