Báo cáo toán học: "New upper bound for a class of vertex Folkman numbers" pptx
Báo cáo toán học: "New upper bound for a class of vertex Folkman numbers" pptx
... New upper bound for a class of vertex Folkman
numbers
N. Kolev
Department of Algebra
Faculty of Mathematics and Informatics
“St. Kl. Ohridski” University of So a
5 J. Bourchier blvd, 1164 So a
BULGARIA
N. ... ≥ max {a
1
, ,a
r
}. Folkman [3] proved
that there exists a graph G such that G → (a
1
, ,a
r
)andcl(G)=max {a
1
, ,a
r
}.
Therefore
F (a
1
, ,a
r
; q...
Báo cáo toán học: "New Upper Bounds for the Size of Permutation Codes via Linear Programmin" pdf
... permutation characters of S
n
are available on programs as Magma [5] or
GAP [13]. Using the “linprog” ro utine of Matlab [14], we obtain the bounds in Table 1.
Note that the linear programming ... M. Deza and P. Frankl. On the maximum number of permutations with given max-
imal or minimal distance. Journal of Combinatorial Theory (A) , 22:352–360, 1977.
[11] Michael Deza and Tayuan Hu...
Báo cáo toán học: " Lyapunov-type inequalities for a class of even-order differential equations" doc
... the article as it appeared upon acceptance. Fully formatted
PDF and full text (HTML) versions will be made available soon.
Lyapunov-type inequalities for a class of even-order differential equations
Journal ... Lyapunov-typ e inequalities for certain higher order differential
equations. J. Math. Anal. Appl. 195 , 527–536 (1995)
[9] Tang, XH, Zhang, M: Lyapunov inequalities and stabil...
Báo cáo toán học: "New lower bound for multicolor Ramsey numbers for even cycle" doc
... of Gda´nsk,
Wita Stwosza 57, 80-952 Gda´nsk, Poland.
tdz@math.univ.gda.pl
Andrzej Nowik
†
Institute of Mathematics, University of Gda´nsk,
Wita Stwosza 57, 80-952 Gda´nsk, Poland.
nowik@manta.univ.gda.pl
Piotr ... a
number of corrections.
References
[1] Chv´atal, V., Harary, F.: Generalized Ramsey theory for graphs. I. Diagonal numbers,
Periodica Mathematica Hungarica, 3 (1973) 11...
Báo cáo toán học: "NEW UPPER BOUNDS ON THE ORDER OF CAGES1" pps
... Sciences
University of Delaware, Newark, DE 19716, USA; fellaz@math.udel.edu
V. A. USTIMENKO
Department of Mathematics and Mechanics
University of Kiev, Kiev 252127, Ukraine; vau@trion.kiev.ua
A. J. WOLDAR
Department ... A. J. Woldar was
additionally supported by a Villanova University Faculty Research Grant. V .A. Ustimenko was addition-
ally supported in part by INTAS-93-2530 and...
Báo cáo toán học: "MacMahon’s theorem for a set of permutations with given descent indices and right-maximal record" ppt
... 125, Almaty, Kazakhstan
askar56@hotmail.com
Submitted: Mar 29, 2009; Accepted: Feb 18, 2010; Published: Feb 28, 2010
Mathematics Subject Classification: 0 5A0 5, 0 5A1 5
Abstract
We show that the major ... by
r[max, i](σ) the set of all right-maximal indices of σ, and let r[max, v](σ) denote the set of
all right-maximal values. Note that any right-maximal index is a descent index. In o...
Báo cáo hóa học: " Multiple positive solutions for a class of quasilinear elliptic equations involving concave-convex nonlinearities and Hardy terms" ppt
... Math Anal Appl. 352,
99–111 (2009). doi:10.1016/j.jmaa.2008.06.021
16. Kang, D: Solution of the quasilinear elliptic problem with a critical Sobolev-Hardy exponent and a Hardy term. J Math
Anal ... solutions for all
λ ∈ (0,
q
p
1
(0))
.
Remark 1.4 As Ω is a bounded smooth domain and p =2,the results of Theorems
1.1, 1.2 are improvements of the main results of [18].
Remark 1....
Báo cáo hóa học: "Research Article Solvability for a Class of Abstract Two-Point Boundary Value Problems Derived from Optimal Control" pot
... many
applications such as mathematical finance, differential games, economics, and so on. The
solvability of system (1.1), a n ontrivial generalization of s ystem (1.2), as far as I know,
only a ... (1.1)hasauniquesolutionon [a, b] under assumptions (A1 ), (A2 ),
and (A3 ).
Existence. ThesameargumentastheproofofTheorem 3.3.
6 Boundary Value Problems
Case 2 (α
1
= 0andα
2
> 0). Apply...
Báo cáo toán học: "New Lower Bound Formulas for Multicolored Ramsey Numbers" pptx
... Lower Bound Formulas for
Multicolored Ramsey Numbers
Aaron Robertson
Department of Mathematics
Colgate University, Hamilton, NY 13346
aaron@math.colgate.edu
Submitted: July 26, 2001; Accepted: March ... the phrase diagonal of X,whereX = A, A
,B,B
, or C,tomean
the diagonal of X when X is viewed as a matrix by itself.
Note 2: For ease of reading, we will use (i, j) to re...
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