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| | Isolated Point -- from Wolfram MathWorld |
 | | An isolated point on a curve, also known as an acnode or hermit point, is a point which has no other points in its |
 | | An isolated point of a graph is a node of degree 0 (Hartsfield and Ringel 1990, p. |
 | | -node graphs with no isolated points are 0, 1, 2, 7, 23, 122, 888,... |
| mathworld.wolfram.com /IsolatedPoint.html (165 words) |
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