MyWikiBiz, Author Your Legacy — Friday November 29, 2024
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, 03:30, 28 July 2009
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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>
| + | {| align="center" cellpadding="10" |
− | ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` `
| + | | [[Image:Logical_Graph_Figure_4_Visible_Frame.jpg|500px]] |
− | ` ` ` ` ` o-----------o ` ` ` ` ` ` ` ` ` ` ` ` ` `
| + | |} |
− | ` ` ` ` ` | ` ` ` ` ` | ` ` ` ` ` ` ` ` ` ` ` ` ` `
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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, "@". | + | 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. |
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| Extracting the dual graph from its composite matrix, we get this picture: | | Extracting the dual graph from its composite matrix, we get this picture: |