This quantity offers easy-to-understand but staggering homes received utilizing topological, geometric and graph theoretic instruments within the components lined by way of the Geometry convention that came about in Mulhouse, France from September 7–11, 2014 in honour of Tudor Zamfirescu at the social gathering of his seventieth anniversary. The contributions handle topics in convexity and discrete geometry, in distance geometry or with geometrical taste in combinatorics, graph concept or non-linear research. Written through most sensible specialists, those papers spotlight the shut connections among those fields, in addition to ties to different domain names of geometry and their reciprocal impact. they give an summary on fresh advancements in geometry and its border with discrete arithmetic, and supply solutions to a number of open questions. the quantity addresses a wide viewers in arithmetic, together with researchers and graduate scholars drawn to geometry and geometrical difficulties.

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Namely, x−τ = 1 1 n wherein, on expanding into the power series in x, the coefficient at x −τ Q (τ ) 1−λ x is as stated in Theorem due to equality (9). 3 An Application to Graphical Compositions Graphical compositions, producing their parts which are called flip-flops, and producing new graphs based on those compositions were invented by Chvátal [4] more than 50 years ago. He produced many hypohamiltonian graphs. These are nonhamiltonian graphs but with all vertex-deleted subgraphs being hamiltonian.

D. thesis) by Zamfirescu [42], respectively. Characterizations have been given by Heuchenne [25] for the line digraph, by Zamfirescu [42] for the middle digraph, and by Skowronska et al. [36] for the total digraph. In addition, a lot of research has been done studying these transformations in various contexts [1–44]. Using intersections of sets belonging to a family of sets, in order to define the edge connections in a graph is so natural that it arose independently in a number of areas in connection with both pure and applied mathematics, and has been studied for over 7 decades.

Her father Mihail Oprea was a lawyer, who worked hard and successfully. Relatives say he was most similar to Tudor in all respects, and wanted very much a grandson, but died before Tudor’s birth, at the age of 54. Lt. Col. N. Florescu and his family on 31 July 1933, celebrating the golden wedding anniversary 22 S. Marcus 39 Tudor’s Wife: Helga Hilbert-Zamfirescu Tudor’s wife Helga Hilbert-Zamfirescu was a professional photo-journalist, who had her own photo-laboratory. Beside her profession, she was also attracted to politics and her involvement in the German ecologist party, Bündnis 90/Die Grünen gradually began to claim most of her time and efforts.