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Revision as of 03:30, 28 July 2009
, 03:30, 28 July 2009→Introduction: clarify marking of root nodes
For example, overlaying the corresponding dual graphs on the plane-embedded graphs shown above, we get the following composite picture:
For example, overlaying the corresponding dual graphs on the plane-embedded graphs shown above, we get the following composite picture:
{| align="center" cellpadding="10"
| [[Image:Logical_Graph_Figure_4_Visible_Frame.jpg|500px]]
|}
For a number of pragmatic reasons it is convenient to single out the outermost region of the plane in a distinctive way and to mark it as the ''root node'' of the corresponding dual graph, indicated in the above Figure by the ''amphora'' or ''at'' sign, "@".
For a number of pragmatic reasons it is convenient to single out the outermost region of the plane in a distinctive way and to mark it as the ''root node'' of the corresponding dual graph, indicated in the present text by means of a horizontal strike-through.
Extracting the dual graph from its composite matrix, we get this picture:
Extracting the dual graph from its composite matrix, we get this picture:
