Báo cáo toán học: " A Hilton-Milner Theorem for Vector Spaces" docx

... T(m,n) are negative, it is natural to try to provide them with a combinatorial interpretation by way of a signed version of graph-matching. A signed graph is a graph whose edges are labeled +1and−1, ... equivalent mathematical model: perfect match- ings of grid-graphs, also known as dimer covers or dimer configurations 1 . A perfect matching of a graph (hereafter called just a ma...

Ngày tải lên: 07/08/2014, 06:22

... prove that F 1 and F 2 can both be approximated in distribution by Gaussian random variables with appropriate mean and variance. For F 1 this can be done by setting (using the notation of Lemma 1) X j = ... by E[F 1 ]=S 1 (x)andVar[F 1 ]=S 2 (x)=(1+O (er (a) ))S 2 (a) . (6) A analogous statement holds for F 2 . As a result, the distribution of F 1 − F 2 is O (er (a) ) close to that o...

Ngày tải lên: 07/08/2014, 08:20

... A Traceability Conjecture for Oriented Graphs Marietjie Frick ∗ and Susan A van Aardt † Department of Mathematical Sciences, University of South Africa, South Africa {frickm, vaardsa}@unisa.ac.za Jean ... integers. A vertex partition (A, B) of a graph G is an (a, b)-partition if λ( A ) ≤ a and λ(B) ≤ b. If G has an (a, b)- partition for every pair (a, b) such that a + b = λ(...

Ngày tải lên: 07/08/2014, 21:21

... 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 ... w 1 and w 2 is defined recursively by w 1 ⊔⊔ǫ = w 1 , ǫ⊔⊔w 2 = w 2 and au⊔⊔bv = a( u⊔⊔bv) + b(au⊔⊔v), a, b ∈ A, u, v ∈ A ∗ . For example, ab⊔⊔cd = abcd + acbd + acdb + cabd + cadb + cd...

Ngày tải lên: 08/08/2014, 12:22

... contact resistance. To calculate the contact resistance, Mg was evaporated on the n-Si wafer, and the Ag paste was printed on the Si wafer for reference. The contact resistances of Mg/Si and Ag/Si ... form an ohmic contact with an n+ region, a new material can be inserted between Ag and Si to form low barrier height (Φ B ) and thus to reduce the contact resistance. Among various mater...

Ngày tải lên: 20/06/2014, 21:20

... iteration process. J Math Anal Appl. 178, 301–308 (1993). doi:10.1006/jmaa.1993.1309 6. Noor, MA: New approximation schemes for general variational inequalities. J Math Anal Appl. 251, 217–229 (2000). doi:10.1006/jmaa.2000.7042 7. ... theorem that J(x) ≠ ∅ for any x Î X.Thenthe multi-valued operator J : X ↦ X* is called the normalized duality mapping of X.Recall that a Banach space X...

Ngày tải lên: 20/06/2014, 21:20

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Ngày tải lên: 05/08/2014, 10:20

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Ngày tải lên: 05/08/2014, 15:20

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Ngày tải lên: 05/08/2014, 15:20

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Ngày tải lên: 05/08/2014, 15:20