Báo cáo toán học: "Structural Properties of Twin-Free Graphs" doc

... one -twin-free graph with n vertices. Then there exists a vertex x ∈ V such that G x is one -twin-free and connected. Proof. In this proof, we use twin, twin-free and terminal for one-twin, one -twin-free ... we say that G is r -twin-free or twin-free. A graph with one vertex is trivially twin-free, and generally we consider graphs with at least two vertices. Twin-free graphs are...

Ngày tải lên: 07/08/2014, 15:22

... and a temperature of 37 °C. Only results corresponding to a voltage below 600 mV are shown. Table 1. Prediction of the secondary structure of SgI by computer- based analysis of far-UV CD measurements. Program Temperature (°C) 240–208 ... GFP CDSSTR 5426 20 5 24 37 6 25 45 5 24 65 6 25 90 7 23 a Percent of total sum of secondary structure. Structural properties of semenogelin I...

Ngày tải lên: 23/03/2014, 07:20

... valuation of sequences counting Alternating Sign Matrices. Journal of In teger Sequences, 12:1–21, 2009. [5] D. Zeilberger. Proof of the Alternating Sign Matrix conjecture. Electronic Journal of Combinatorics, ... a careful reading of the manuscript. The work of the second author was partially f unded by NSF-DMS 0713836. References [1] D. Bressoud. Proofs and Confirmations: the sto...

Ngày tải lên: 08/08/2014, 14:23

... member of the second coordinate of the label of y, delete the edge x j y.If the digit of z is 3 and y is not a member of the second coordinate of the label of z, delete the electronic journal of ... Subclaims, the proof of our lemma is complete. 5 Proof of the Main Theorem In this section, we present the proof of the main theorem. Let C be a topologically closed class o...

Ngày tải lên: 07/08/2014, 06:23

... spectrum of D a,b,0 (with δ  3). Lemma 3.4. The spectrum of D a,b,0 with δ = gcd(a, b)  3 consists of the eigenvalues of C δ (except 2 and −2) with multiplicity 3, the eigenvalues of C a and ... eigenvalues of C a ∪ C b and be of multiplicity 1. This ends the proof. From the above lemma we know to some extent the spectrum of D a,b,0 . If H is a tentative cospectral mate of...

Ngày tải lên: 08/08/2014, 12:22

... level of acetylation of a peptide was estimated on the basis of the intensity ratio of the native and acetylated species. From the data summar- ized in Table 1, it can be seen that some of the ... compound. Quantitative analysis of components was performed by integration of the multiple charged ions of the single species. For protein analysis, the separation was attained with...

Ngày tải lên: 07/03/2014, 14:20

... Parvatham, R: Properties of a class of functions with bounded boundary rotation. Ann. Polon. Math. 31, 311–323 (1975) [3]. Noor, KI: On radii of convexity and starlikeness of some classes of analytic ... family of integral operator using famous convolution technique. We also apply this newly defined operator for investigating some interesting mapping properties of certai...

Ngày tải lên: 20/06/2014, 21:20

Ngày tải lên: 05/08/2014, 15:21

Ngày tải lên: 05/08/2014, 15:21

... version of Graffiti made number of conjectures about operations R and B (derived from the chromatic number) and we included a sample of them in the first draft of this paper. Since then, most of these ... Written on the Wall, a list of conjectures of Graffiti. Ramseyan Properties of Graphs by Ermelinda DeLaVina delavina@math.uh.edu Siemion Fajtlowicz siemion@math.uh.edu Universit...

Ngày tải lên: 07/08/2014, 06:20