Báo cáo toán học: "On a conjecture concerning dyadic oriented matroids" pptx
Báo cáo toán học: "On a conjecture concerning dyadic oriented matroids" pptx
... subdeterminants are in
{±2
k
: k ∈ Z}. An oriented matriod is dyadic if it has a totally dyadic represen-
tation A. A dyadic oriented matriod is dyadic of order k if it has a totally dyadic
representation A ... totally dyadic
representation A. A dyadic oriented matriod is dyadic of order k if it has a
totally dyadic representation A with full row rank a...
Báo cáo toán học: "On a conjecture concerning the Petersen graph" ppt
... interesting classes of non-Cayley
graphs and digraphs (generalized Petersen, Kneser, metacirculant and quasi-Cayley)
and all four classes contain P
10
.
The Petersen graph has long played an important ... that u is adjacent to x
i
and v is adjacent
to x
j
. Clearly, x
i
and x
j
are not adjacent by the girth hypothesis. By Claim 2, graph
J
4
contains an induced even path P
ij
of length a t l...
Báo cáo toán học: "On a Conjecture of Frankl and F¨redi u" doc
... discussions
with Eva Czabarka, Ida Kantor, Gyula O.H. Ka t ona, Nathan Lemons, Bal´azs Patk´os,
L´aszl´o Sz´ekely, and Jacques Verstra¨ete. The author thanks the NSF for funding her and
IPAM for hosting ... (3.17)
Since the average degree of a vertex in F ∈ F is greater than k , every set F ∈ F contains
a heavy vertex. As F is non-trivial, there are at least two heavy vertices. We conside...
Báo cáo toán học: "On a Class of Constant Weight Codes" pptx
... t)]
and we already know that the absolute value of the inner sum was found to be
smaller than 3
√
q/2. One may extend the codes C(q, n) in a similar way. Using the
same approach as that in ... follows that the polynomial
P (X)=(X + x)(X + x)(X + y)(X + y)
On a Class of Constant Weight Codes
Mihai Caragiu
Institute of Mathematics Bucharest
and
Department of Mathematics, Pennsylvania St...
Báo cáo toán học: " On a Partition Function of Richard Stanley" pptx
... The Main Theorem
We begin with some preliminaries about partitions and their conjugates. For a given
partition π with parts each N,wedenotebyf
i
(π) the number of appearances of i as a
part ... following be dealing with partitions whose parts are all some
given N.Welet¯π be that partition made up of the parts of π that are <N. In light of
(11) we see that if N is a part of π an e...
Báo cáo toán học: "On a Generalization of Meyniel’s Conjecture on the Cops and Robbers Game" potx
... Generalization of Meyniel’s Conjecture
on the Cops and Robbers Game
Noga Alon
∗
Tel Aviv University
and
Institute for Advanced Study, Princeton
nogaa@tau.ac.il
Abbas Mehrabian
Department of Combinatorics ... m.
Remark. It can be shown using a similar argument that every x ∈ X has at most m
neighbors in A.
By an escaping pair we mean a pair (x, y) of vertices with x ∈ X and y ∈ N
A
s...
Báo cáo toán học: "On a System of Semilinear Elliptic Equations on an Unbounded Domain" potx
... C. Evans, Partial Diff. Equations, American Math. Society, 1998.
5. C. Vargas an d M. Zuluaga, On a Nonlinear Dirichlet Problem Type at Resonance
and Bifurcation, Partial Differential Equations, ... Elliptic
Equations on an Unbounded Domain
Hoang Quoc Toan
Fa culty of Math., Mech. and Inform.
Vietnam National University, 334 Nguyen Trai, Hanoi, Vietnam
Received Ma y 12, 2004
Revised August 28...
Báo cáo toán học: " On a Probability Metric Based on Trotter Operator " ppsx
... spaces of random variables, Math. Uspekhi
101 (1976) 417–454 (Russian).
28. V.M. Zolotarev, Ideal metrics in the problems of probability theory and mathe-
matical statistics, Austral. J. Statist. ... the approximating type a metric as a comparison
measure must be selected in accordance with the requirements to its properties.
In recent years several results of applied mathematics and info...
Báo cáo toán học: "On a Strange Recursion of Golomb" ppsx
... these are sophisticated, and the problem serves as a useful study of
these techniques, and the algebraic analysis gives partial information about the formulation
of a bijective proof.
The paper ... t
exp
wzt
1+zt
,
where
L
(r)
w
(f)=
1
r!
w
r
∂
r
f
∂w
r
w=1
and Θ
w
: w
k
→ k!w
k
.
The combinatorial nature of the transformations leads one to ask whether combinatorial
objects and...
Báo cáo toán học: "On a Strange Recursion of Golomb" pptx
... Department of Mathematics
University of Toronto University of Toronto
Toronto, Canada M5S 1A1 Toronto, Canada M5S 1A1
barbeau@math.utoronto.ca tanny@math.utoronto.ca
Submitted: January 4, 1996; Accepted: ... metafibonacci
type, parameterized by k,and,foreachk, identified what he speculated was the unique increas-
ing solution. We show that, to the contrary, there are many increasing solutions...
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