منابع مشابه
Plane Flows with Few Stagnation Points by Anatole Beck
Introduction. This announcement deals with the subject of continuous flows in the Euclidean plane. I t has long been known (cf. [ l]) tha t every closed set in the plane is the invariant set of some continuous flow. In a recent paper [2], this author has shown that the same statement is not true for flows all of whose orbits are closed in the plane. In fact a necessary and sufficient condition ...
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Dujmović, Eppstein, Suderman, and Wood showed that every 3-connected plane graph G with n vertices admits a straight-line drawing with at most 2.5n− 3 segments, which is also the best known upper bound when restricted to plane triangulations. On the other hand, they showed that there exist triangulations requiring 2n − 6 segments. In this paper we show that every plane triangulation admits a st...
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This paper presents a dynamic-optimization algorithm that can be used to minimize a generalized objective function. It is demonstrated for a chemical-vapor-deposition (CVD) process in a stagnation-flow reactor. The equations describing the chemically reacting flow are written in a transient compressible similarity form. After discretizing the spatial derivatives on a finite-volume mesh, the sys...
متن کاملLattice 3-Polytopes with Few Lattice Points
This paper is intended as a first step in a program for a full algorithmic enumeration of lattice 3-polytopes. The program is based in the following two facts, that we prove: • For each n there is only a finite number of (equivalence classes of) 3polytopes of lattice width larger than one, where n is the number of lattice points. Polytopes of width one are infinitely many, but easy to classify....
متن کاملSingle Nucleotide Polymorphisms and Association Studies: A Few Critical Points
Uncovering DNA sequence variations that correlate with phenotypic changes, e.g., diseases, is the aim of sequence variation studies. Common types sequence variations are Single nucleotide polymorphism (SNP, pronounced snip).SNPs are the third-generation molecular marker. SNP represents a DNA sequence variant of a single base pair with the minor allele occurring in more than 1% of a given popula...
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ژورنال
عنوان ژورنال: Bulletin of the American Mathematical Society
سال: 1965
ISSN: 0002-9904
DOI: 10.1090/s0002-9904-1965-11428-8