Báo cáo toán học: "Mapping cones and exact sequences in KK-theory " pptx
Báo cáo toán học: " Tight Quotients and Double Quotients in the Bruhat Order" doc
... other hand, bearing in mind that µ and ν are in the interior of the same Weyl
chamber C,andwµ = µ
+
and wν = ν
+
are dominant, we may use Proposition 4.4 to
compare the ranks of x(µ)andx(ν) in the ... , including the cross section X and the subspace V .Moreover,V also
carries a standard ordering relative to the root system Φ; however, these two “standard”
orderings of V coincide:...
Báo cáo toán học: "Total domination and matching numbers in claw-free graphs" doc
... 4-cycle containing both v
1
and v
2
or containing both v
3
and v
4
.
Proof. Suppose, to the contrary, that there is a 4-cycle containing both v
1
and v
2
or
containing both v
3
and v
4
. By symmetry, ... H
v
contains an edge {v
1
,v
2
,v
5
} containing v
1
and v
2
,and
an edge {v
3
,v
4
,v
5
} containing v
3
and v
4
. Since the edges N(v
i
), 1 ≤ i ≤ 4, are deleted
from H
G
when...
Báo cáo toán học: "Distance domination and distance irredundance in graphs" ppsx
... k-dominating set
of G if the distance between each vertex u ∈ V − D and D is at most k (and
D induces a connected graph in G). The minimum cardinality of a (connected)
distance k-dominating set in ... the minimum cardinality taken over all maximal
k-irredundant sets of vertices of G.
In 1975, Meir and Moon [10] introduced the concept of a k-dominating set (called a
‘k-covering’ in...
Báo cáo toán học: "Global alliances and independent domination in some classes of graphs" pdf
... maximal independent set and that in every graph,
γ(G) ≤ i(G) ≤ β(G) where γ(G) and i(G) are respectively the minimum cardinality
of a dominating set and of an independent dominating set and β(G) ... Hedetniemi and S. T. Hedetniemi, Alliances in graphs, JCMCC
48 (2004), 157-177.
[7] N. Linial, D. Peleg, Y. Rabinovich and M. Saks, Sphere packing and local majorities
in graph...
Báo cáo toán học: "Topological circles and Euler tours in locally finite graphs" pptx
... Diestel and D. K¨uhn. On in nite cycles II. Combinatorica , 24:91–116, 2004.
[15] R. Diestel and D. K¨uhn. Topological paths, cycles and spanning trees in infinite
graphs. Europ. J. Combinatorics, ... every inner
point of an edge of G is the image of exactly one point of S
1
(thus, every edge is traversed
exactly once, and in a “straight” manner).
A trail in a multigraph G is a...
Báo cáo toán học: "Rationality, irrationality, and Wilf equivalence in generalized factor order" ppsx
... of the embedding
factor w
′
= 343 which has embedding index 5, and the two 2’s of u are in po sitions 6 and
7. Note that we obtain ordinary factor order by taking P to be an antichain. Also, we
will ... “weakly increasing”
and “maximum” have their usual meanings. Also, let w
+m
be the result of applying the
+ operator m times. By using the previous lemma a nd induction, we obtain the...
Báo cáo toán học: " The structural and optical properties of GaSb/InGaAs type- quantum dots grown on InP (100) substrate" ppt
... Physics, Institute of Physics, Chinese
Academy of Sciences, Beijing, 100190, China
3
Engineering Research Center of Solid-State Lighting, School of Electrical
Engineering and Automation, Tianjin ... Jia Haiqiang
2
, Wang Wenxin
2
, Chen Hong
2
, and Zhao Liancheng*
1
1
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin,
150001, China
2
National L...
Báo cáo toán học: " Structural, optical and magnetic studies of manganese-doped zinc oxide hierarchical microspheres by self-assembly of nanoparticles" docx
... band edge with increasing
dopant concentration, and corresponding photoluminescence spectra show that Mn
doping suppresses both near-band edge UV emission and defect-related blue emission. In ... become light yellow, and the color becomes
deeper and deeper with increasing Mn. The phase purity and crystal structure of the
pristine ZnO and Mn-doped ZnO for various doping level...
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