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Constructions for type I trees with nonisomorphic Perron branches

Stephen J. Kirkland

Czechoslovak Mathematical Journal (1999)

  • Volume: 49, Issue: 3, page 617-632
  • ISSN: 0011-4642

Abstract

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A tree is classified as being type I provided that there are two or more Perron branches at its characteristic vertex. The question arises as to how one might construct such a tree in which the Perron branches at the characteristic vertex are not isomorphic. Motivated by an example of Grone and Merris, we produce a large class of such trees, and show how to construct others from them. We also investigate some of the properties of a subclass of these trees. Throughout, we exploit connections between characteristic vertices, algebraic connectivity, and Perron values of certain positive matrices associated with the tree.

How to cite

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Kirkland, Stephen J.. "Constructions for type I trees with nonisomorphic Perron branches." Czechoslovak Mathematical Journal 49.3 (1999): 617-632. <http://eudml.org/doc/30510>.

@article{Kirkland1999,
abstract = {A tree is classified as being type I provided that there are two or more Perron branches at its characteristic vertex. The question arises as to how one might construct such a tree in which the Perron branches at the characteristic vertex are not isomorphic. Motivated by an example of Grone and Merris, we produce a large class of such trees, and show how to construct others from them. We also investigate some of the properties of a subclass of these trees. Throughout, we exploit connections between characteristic vertices, algebraic connectivity, and Perron values of certain positive matrices associated with the tree.},
author = {Kirkland, Stephen J.},
journal = {Czechoslovak Mathematical Journal},
keywords = {weighted graph; Laplacian matrix; algebraic connectivity},
language = {eng},
number = {3},
pages = {617-632},
publisher = {Institute of Mathematics, Academy of Sciences of the Czech Republic},
title = {Constructions for type I trees with nonisomorphic Perron branches},
url = {http://eudml.org/doc/30510},
volume = {49},
year = {1999},
}

TY - JOUR
AU - Kirkland, Stephen J.
TI - Constructions for type I trees with nonisomorphic Perron branches
JO - Czechoslovak Mathematical Journal
PY - 1999
PB - Institute of Mathematics, Academy of Sciences of the Czech Republic
VL - 49
IS - 3
SP - 617
EP - 632
AB - A tree is classified as being type I provided that there are two or more Perron branches at its characteristic vertex. The question arises as to how one might construct such a tree in which the Perron branches at the characteristic vertex are not isomorphic. Motivated by an example of Grone and Merris, we produce a large class of such trees, and show how to construct others from them. We also investigate some of the properties of a subclass of these trees. Throughout, we exploit connections between characteristic vertices, algebraic connectivity, and Perron values of certain positive matrices associated with the tree.
LA - eng
KW - weighted graph; Laplacian matrix; algebraic connectivity
UR - http://eudml.org/doc/30510
ER -

References

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  1. Algebraic connectivity of graphs, Czechoslovak Math. J. 23 (98) (1973), 298–305. (1973) Zbl0265.05119MR0318007
  2. A property of eigenvectors of nonnegative symmetric matrices and its applications to graph theory, Czechoslovak Math. J. 25 (100) (1975), 619–633. (1975) MR0387321
  3. Algebraic connectivity of trees, Czechoslovak Math. J. 37 (112) (1987), 660–670. (1987) MR0913997
  4. 10.1080/03081089608818448, Linear and Multilinear Algebra 40 (1996), 311–325. (1996) MR1384650DOI10.1080/03081089608818448
  5. 10.1080/03081088708817827, Linear and Multilinear Algebra 22 (1987), 115–131. (1987) Zbl0636.05021MR0936566DOI10.1080/03081088708817827
  6. Laplacian matrices of graphs: a survey, Linear Algebra Appl. 197/198 (1994), 143–176. (1994) Zbl0802.05053MR1275613

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