## Group Theoretical Mode Interactions with Different Symmetries.

Please always quote using this URN: urn:nbn:de:0297-zib-994
• In two-parameter systems two symmetry breaking bifurcation points of different types coalesce generically within one point. This causes secondary bifurcation points to exist. The aim of this paper is to understand this phenomenon with group theory and the innerconnectivity of irreducible representations of supergroup and subgroups. Colored pictures of examples are included.

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