English: This diagram shows the descendant tree of the root <243,6>, restricted to finite 3-groups with coclass 2. All vertices possess an abelianization of type (3,3). Important vertices are labelled with their SmallGroups Library identifier in angle brackets. Vertices surrounded by ovals are populated by second 3-class groups of complex quadratic fields with discriminant d<0. The underlined counters adjacent to the ovals surrounding these vertices give the minimal absolute discriminants of the distribution. TTT means transfer target type. TKT means transfer kernel type. The mainline descendant <729,49> of the root was called Q by Judith A. Ascione.
User:DanielConstantinMayer added png-file "MinDiscriminantsTreeQ"
Date
21 September 2014 (original upload date)
Source
Own work. The distribution of TTTs was computed by Michael R. Bush, WLU, Lexington, VA. It is reproduced here with his permission, provided his authorship is acknowledged with every usage of the information. The distribution of TKTs was computed by myself (User:DanielConstantinMayer).
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Original upload log
The original description page was here. All following user names refer to en.wikipedia.