Skip to main content

All Questions

Filter by
Sorted by
Tagged with
0 votes
0 answers
24 views

Online algorithms for MSTs from time series

Is it possible to construct the MST (minimum-weight spanning tree) for an potentially infinite sequence of points $\lbrace (i,Y[i]): i\in\mathbb{N}_0,\,c_{\text{min}} \le Y[i]\le c_{\text{max}}\rbrace$...
Manfred Weis's user avatar
  • 13.2k
1 vote
0 answers
52 views

How can we hang the weighted trees so that vertices nearer to root (based on distances, not hop count) lie in upper levels?

I have a set of edge weighted trees, each tree rooted at some vertex. Consider these trees are hung from the roots and vertices are arranged in some levels. I wish to design an algorithm (...
Hemraj Raikwar's user avatar
2 votes
0 answers
162 views

Calculating Minimum Spanning Trees in Very Big Graphs

I need to determine Minimum Spanning Trees (MST) of very big complete graphs, whose edgeweights can be calculated from data that is associated with the vertices. In the planar euclidean case, for ...
Manfred Weis's user avatar
  • 13.2k
7 votes
1 answer
465 views

Counting spanning trees of a planar graph

I know through Kirchoff's Theorem, one can calculate the number of spanning trees via the determinant of a Laplacian. This has complexity $O(N^{2.373}$). I was wondering if anyone was aware of a ...
Zach Hunter's user avatar
  • 3,499
5 votes
2 answers
460 views

Spanning tree minimizing $F_T = \sum_{i = 1}^{|V| - 1|} (w(e_i) - P_T)^2$

Let $G = \langle V, E \rangle$ be an undirected, connected and weighted multigraph, with the weights given by a function $w: E \rightarrow N$. Consider any spanning tree $T$. Denote the edges of $T$ ...
J. Abraham's user avatar
2 votes
1 answer
340 views

Spanning tree with sufficient transformation [closed]

How can I give a set of transitions sufficient to transform any spanning tree into any another spanning tree in a finite number of steps via spanning trees? I was wondering if someone help me.Thanks.
user123's user avatar
  • 23
2 votes
0 answers
105 views

Is there a name for this variant of the MST and the TSP?

Suppose I am given a weighted graph $G$ that contains a "start vertex" $v_0$, and my goal is to construct a set of paths that all originate at $v_0$ and touch all of the vertices of $G$, with as ...
Tom Solberg's user avatar
  • 4,049