The inverse problem for certain tree parameters.
The inverse problem for certain tree parameters.
复制标题
DOI:
10.1016/j.dam.2009.07.004
复制
发表时间:
2009-08-06
影响因子:
1.1
通讯作者:
Wagner, Stephan
中科院分区:
文献类型:
--
作者:
Czabarka, Eva;Szekely, Laszlo;Wagner, Stephan
Let p be a graph parameter that assigns a positive integer value to every graph. The inverse problem for p asks for a graph within a prescribed class (here, we will only be concerned with trees), given the value of p. In this context, it is of interest to know whether such a graph can be found for all or at least almost all integer values of p. We will provide a very general setting for this type of problem over the set of all trees, describe some simple examples and finally consider the interesting parameter “number of subtrees”, where the problem can be reduced to some number-theoretic considerations. Specifically, we will prove that every positive integer, with only 34 exceptions, is the number of subtrees of some tree.
登录
查看更多内容
影响因子:
2.4
作者:
HEILMANN, OJ;LIEB, EH
通讯作者:
LIEB, EH
影响因子:
1.6
作者:
Wang, Hua;Yu, Guang
通讯作者:
Yu, Guang
DOI:
10.1021/ci980004b
发表时间:
1998-09-01
期刊:
JOURNAL OF CHEMICAL INFORMATION AND COMPUTER SCIENCES
影响因子:
--
作者:
Lepovic, M;Gutman, I
通讯作者:
Gutman, I
影响因子:
0.8
作者:
LINEK, V
通讯作者:
LINEK, V
DOI:
10.1137/0607015
发表时间:
1986-01-01
期刊:
SIAM JOURNAL ON ALGEBRAIC AND DISCRETE METHODS
影响因子:
--
作者:
WILF, HS
通讯作者:
WILF, HS