Minimum degree, leaf number and traceability
نویسندگان
چکیده
منابع مشابه
Girth, minimum degree, independence, and broadcast independence
An independent broadcast on a connected graph $G$is a function $f:V(G)to mathbb{N}_0$such that, for every vertex $x$ of $G$, the value $f(x)$ is at most the eccentricity of $x$ in $G$,and $f(x)>0$ implies that $f(y)=0$ for every vertex $y$ of $G$ within distance at most $f(x)$ from $x$.The broadcast independence number $alpha_b(G)$ of $G$is the largest weight $sumlimits_{xin V(G)}f(x)$of an ind...
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Let (G) be the minimum degree of a graph G: A number of results about trianglefree graphs determine the maximum chromatic number of graphs of order n with (G) n=3: In this paper these results are extended to Kr+1-free graphs of order n with (G) (1 2= (2r 1))n: In particular: (a) there exist Kr+1-free graphs of order n with (G) > (1 2= (2r 1))n o (n) and arbitrary large chromatic number; (b) if ...
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If G is a simple graph with minimum degree <5(G) satisfying <5(G) ^ f(| K(C?)| -f-1) the total chromatic number conjecture holds; moreover if S(G) ^ f| V(G)\ then #T(G) < A(G) + 3. Also if G has odd order and is regular with d{G) ^ \^/1\V{G)\ then a necessary and sufficient condition for ^T((7) = A((7)+ 1 is given.
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ژورنال
عنوان ژورنال: Czechoslovak Mathematical Journal
سال: 2013
ISSN: 0011-4642,1572-9141
DOI: 10.1007/s10587-013-0036-y