Hostname: page-component-cd9895bd7-gxg78 Total loading time: 0 Render date: 2024-12-26T00:42:10.077Z Has data issue: false hasContentIssue false

Minimal generating systems of a subgroup of SL(2, ℂ)

Published online by Cambridge University Press:  20 January 2009

Gerhard Rosenberger
Affiliation:
Fachbereich Mathematik, der Universität Dortmund, Postfach 50 05 00, 4600 Dortmund 50, Fed. Rep. of Germany
Rights & Permissions [Opens in a new window]

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Let H be any group. We call a cardinal number r the rank r(H) of H if H can be generated by a generating system X with cardinal number r but not by a generating system Y with cardinal number s less than r. Let r(H) be the rank of H.

We call a generating system X of H a minimal generating system (M.G.S.) of H if X has the cardinal number r(H).

In this note we prove the following.

Type
Research Article
Copyright
Copyright © Edinburgh Mathematical Society 1988

References

REFERENCES

1.Ford, J. R., Automorphic functions. 2nd Edition (Chelsea, New York, 1951).Google Scholar
2.Helling, H., Diskrete Untergruppen von SL 2, Invent. Math. 17 (1972), 217229.CrossRefGoogle Scholar
3.Kern-Isberner, G. and Rosenberger, G., Einige Bemerkungen über Untergruppen der PSL(2, ℂ), Resultate Math. 6 (1983), 4047.CrossRefGoogle Scholar
4.Rosenberger, G., Some remarks on a paper of C. Doyle and D. James on subgroups of SL(2, ℝ), Illinois J. Math. 28 (1984), 348351.CrossRefGoogle Scholar