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MyWikiBiz, Author Your Legacy — Friday November 29, 2024
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→‎Introduction: clarify marking of root nodes
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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:
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<pre>
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{| align="center" cellpadding="10"
` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` `
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| [[Image:Logical_Graph_Figure_4_Visible_Frame.jpg|500px]]
` ` ` ` ` o-----------o ` ` ` ` ` ` ` ` ` ` ` ` ` `
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|}
` ` ` ` ` | ` ` ` ` ` | ` ` ` ` ` ` ` ` ` ` ` ` ` `
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` ` ` ` ` | o-------o | ` ` ` ` ` ` ` ` ` ` ` ` ` `
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` ` ` ` ` | | ` ` ` | | ` ` ` ` ` ` ` ` ` ` ` ` ` `
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` ` ` ` ` | | ` o ` | | ` ` ` = ` ` ` ` ` ` ` ` ` `
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` ` ` ` ` | | ` | ` | | ` ` ` ` ` ` ` ` ` ` ` ` ` `
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` ` ` ` ` | o---|---o | ` ` ` ` ` ` ` ` ` ` ` ` ` `
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` ` ` ` ` | ` ` o ` ` | ` ` ` ` ` ` ` ` ` ` ` ` ` `
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` ` ` ` ` o-----|-----o ` ` ` ` ` ` ` ` ` ` ` ` ` `
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` ` ` ` ` ` ` ` | ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` `
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` ` ` ` ` ` ` ` @ ` ` ` ` ` ` = ` ` ` ` @ ` ` ` ` `
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` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` `
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</pre>
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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, "@".
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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:
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