tudor zamfirescu | Tudor ZAMFIRESCU tudor zamfirescu Tudor Zamfirescu: On Two Conjectures of Franz Hering about Convex Surfaces. Discret. Comput. Geom. 6: 171-180 (1991)
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0 · Tudor Zamfirescu: From Convex to Magic
1 · Tudor Zamfirescu: From Convex to Magic
2 · Tudor Zamfirescu's lab
3 · Tudor Zamfirescu
4 · Tudor Zamfirescu
5 · Tudor ZAMFIRESCU
6 · Tudor I Zamfirescu
7 · Poidge
8 · Curriculum Vitae
9 · Critical Points on Convex Surfaces
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Tudor Zamfirescu. email: [email protected], Updated: 5 August 2024. List of publications. 1. On homothetic triangles (Roum.), Gaz. Mat. Fiz. B 10 (1959) 20-21. 2. Properties of arbitrary .
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Tudor Zamfirescu. September 6, 2021. Abstract. We investigate in this paper .Tudor ZAMFIRESCU, Professor | Cited by 2,483 | of Technische Universität Dortmund, Dortmund (TUD) | Read 271 publications | Contact Tudor ZAMFIRESCUTudor Zamfirescu. Parents: Prof. Dr. Ing. Ion Zamfirescu, Rodica Zamfirescu. Citizenships: Romanian, German. Birth: 1944 in Stockholm. Education: 1951-1961: Elementary and high .
The area of convexity became Tudor’s new world, and we nowadays know that this universal paradigm is the main key word in Tudor’s creativity. Equally fictional are the characters of the .Tudor Zamfirescu: On Two Conjectures of Franz Hering about Convex Surfaces. Discret. Comput. Geom. 6: 171-180 (1991) Tudor Zamfirescu was born as what is called in mathematics a counter-example. He is Roumanian, but he was born in Sweden (on 20 April 1944). It is nice to learn from his .
Tudor Zamfirescu. Fachbereich Mathematik, Technische Universität Dortmund, 44221 Dortmund, Germany. Institute of Mathematics “Simion Stoilow”, Romanian Academy, Bucharest, .
9 Reads. Thin Right Triangle Convexity. Full-text available. Article. Nov 2022. Let F be a family of sets in Rd (always d≥2). A set M⊂Rd is called F-convex, if for any pair of distinct points.
Tudor Zamfirescu. September 6, 2021. Abstract. We investigate in this paper the poidge-convexity, which is a generalization of right convexity, introduced by one of the present .
Tudor Zamfirescu. 64 Accesses. Explore all metrics. Abstract. The cut locus C ( x) of some point x on an open convex surface is a forest and has measure zero. However, we .Tudor Zamfirescu. 2018. See full PDF download Download PDF. Related papers. The essentials of, and for, mathematics. Robbin Lakatos. download Download free PDF View PDF chevron_right. Mathematics is everywhere – Connecting .Tudor Zamfirescu Alexandrov spaces are a large class of metric spaces that includes Hilbert spaces, Riemannian manifolds and convex surfaces. In the framework of Alexandrov spaces, we examine the ambiguous locus of analysis and the cut locus of differen-tial geometry, proving a general bisecting property, showing
Electronic Journal of Graph Theory and Applications 1 (1) (2013), 56–76 Intersecting longest paths and longest cycles: A survey Ayesha Shabbira , Carol T. Zamfirescub , Tudor I. Zamfirescub,c,a “Abdus Salam” School of .Yasir Bashir, Tudor Zamfirescu Dedicated to the memory of Nicolae Popescu (1937-2010) on the occasion of his 75th anniversary Abstract We investigate graphs with the property that all longest paths or all longest cycles have empty intersection. In this paper, we find such graphs as subgraphs of cubic lattices.
Tudor Zamfirescu: From Convex to Magic Solomon Marcus 1 Born as a Counter-Example Tudor Zamfirescu was born as what is called in mathematics a counter-example. He is Roumanian, but he was born in Sweden (on 20 April 1944). It is nice to learn from his mother that, a few months before Tudor’s birth, she was driving a car on the roads of Finland.This volume presents easy-to-understand yet surprising properties obtained using topological, geometric and graph theoretic tools in the areas covered by the Geometry Conference that took place in Mulhouse, France from September 7–11, 2014 in honour of Tudor Zamfirescu on the occasion of his 70th anniversary.Journal of Informatics and Mathematical Sciences, 2020. In this paper, two different classes of mappings namely, uniformly continuous asymptotically nonexpansive and uniformly continuous asymptotically demicontractive mappings are considered on the general modified Noor iteration process with errors and proved to converge strongly to the fixed point of uniformly continuous . Tudor Zamfirescu was born as what is called in mathematics a counter-example. He is Roumanian, but he was born in Sweden (on 20 April 1944). Discover the world's research
212 TUDOR ZAMFIRESCU The graph of Figure 1 provides Pf g 20 and will be used later. Now, we consider the graph A of Figure 2. A has 15 vertices. The proofs of the following lemmas are easy. Fig. 1. Fig. 2. Lemma 1. The longest paths of A joining a with b have 12 vertices. Lemma 2. For each vertex ν of A different from a and b, there exists a
College of Mathematics and Information Science, Hebei Normal University, Shijiazhuang, China 050024 Hebei Key Laboratory of Computational Mathematics and Applications, Shijiazhuang, China 050024 [email protected] TUDOR ZAMFIRESCU received his master degree in mathematics from the University of Bucharest in 1966, his doctor degree from the .
Tudor Zamfirescu: From Convex to Magic
Let F be a family of sets in Rd (always d≥2). A set M⊂Rd is called F-convex, if for any pair of distinct points x,y∈M, there is a set F∈F, such that x,y∈F and F⊂M.447 448 Ayesha Shabbir, Tudor Zamfirescu Research on Pjk - and Cjk -graphs started in 1966, when Gallai asked the question “do we have graphs in which every vertex is missed by some longest path?” [4]. In 1972, Zamfirescu asked for Pjk - and Cjk -graphs of small (if possible minimal) order [14]. The question was also asked for the special . TUDOR ZAMFIRESCU received his master degree in mathematics from the University of Bucharest in 1966, his doctor degree from the Ruhr-Universität Bochum in 1968, and his Habilitation from the University of Dortmund in 1972. He continued to teach at the University of Dortmund until 2009. Thereafter, he was appointed a researcher at the Mathematical Institute .
The central theme of this paper is the study of problems related to longest paths in graphs, both from a structural and an algorithmic point of view, and the problem of finding a longest path in a graph, which is NP -hard for arbitrary graphs.Tudor Zamfirescu. email: [email protected], Updated: 5 August 2024. List of publications. 1. On homothetic triangles (Roum.), Gaz. Mat. Fiz. B 10 (1959) 20-21. 2. Properties of arbitrary triangles and their circumscribed circles (Roum.), Gaz. Mat. Fiz. B 10 (1959) 346-350. 3.The poidge-convexity also generalizes the thin rectangular convexity (for short tr-convexity, where F is the family of all boundaries of non-degenerated rectangles), and a fortiori the rectangular convexity itself. In this paper, we start the investigation of poidge-convexity.16:00 -- 16:30 Ch. Zamfirescu (New York): From intersection digraphs to transformation digraphs, and applications Venerdì 10:00 -- 10:45 D. Frettlöh (Bielefeld): Weird normal tilings 11:15 -- 11:45 M. Stupariu (Bucharest): Discrete curvatures of triangle meshes: From approximation of smooth surfaces to digital terrain data
Tudor Zamfirescu Abstract. We strengthen one of Stechkin’s theorems. We also obtain results in the same spirit regarding the farthest point mapping. We work in length spaces, sometimes without bifurcating geodesics, sometimes with geodesic extendability. Let KˆRd be a closed set and p K the nearest point mapping, which asso-
This conference continues and ends a series of conferences started in Dortmund in 1980. The lectures will take place at the University of Bucharest, Faculty of Mathematics and Computer Science, shown as a red circle on the map below (or click here). For evenings: In walking distance (500 m south) is old Bucharest—Lipscani—with small restaurants and bars. 500 m further .Tudor ZAMFIRESCU Baire Categories in Convexity (**). O. — Introduction. It is well-known how useful the Baire category theorem was in Analysis for half a century and it is also known that it keeps being an important tool to distinguish between small and big sets in the absence of a measure (or in contrast to what a measure provides),
Tudor Zamfirescu Research. Tudor Zamfirescu email: [email protected], Updated: 14 August 2015 [List of publications] List with citations 1. On homothetic triangles (rom.), Gaz. Mat. Fiz. B 10 (1959) 20-21. 2.Introduction. This paper completes the description of the curvature behaviour of most convex surfaces, the words "most" and "typical" being used in the sense of "all, except those in a set of first Baire category". It is known that typical convex surfaces are smooth and strictly convex (V. Klee [7]), but not of class C2 (P. Gruber [4]).
TUDOR ZAMFIRESCU If the hypothesis of a theorem contains a class of arbitrary elements, then the restriction of this class is, in fact, a generalization of the theorem. The following discussion will lead to such extensions of the well-known lemmas especially used in the Calculus of Variations and in the Theory of Distri- butions.
Tudor Zamfirescu: From Convex to Magic
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