Keywords and Synonyms
Minimum length spanning trees; Minimum weight spanning trees; Euclidean minimum spanning trees; MST; EMST
Problem Definition
Let S be a set of n points in d‑dimensional real space where \( { d \geq 1 } \) is an integer constant. A minimum spanning tree (MST) of S is a connected acyclic graph with vertex set S of minimum total edge length. The length of an edge equals the distance between its endpoints under some metric. Under the so-called L p metric, the distance between two points x and y with coordinates (\( { x_1, x_2, \dots, x_d } \)) and (\( y_1, y_2, \dots, y_d \)), respectively, is defined as the pth root of the sum \( { \sum_{i=1}^d | x_i - y_i | ^ p } \).
Key Results
Since there is a very large number of papers concerned with geometric MSTs, only a few of them will be mentioned here.
In the common Euclidean L 2 metric, which simply measures straight-line distances, the MST problem in two dimensions can be solved optimally in time \( { O(n \log n) } \),...
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Recommended Reading
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Levcopoulos, C. (2008). Minimum Geometric Spanning Trees. In: Kao, MY. (eds) Encyclopedia of Algorithms. Springer, Boston, MA. https://doi.org/10.1007/978-0-387-30162-4_236
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