The K-LL spectrum in nitrogen has been measured with a high-resolution electron spectrometer using 1) 3 keV electrons and 2) AIKa X-rays to produce the initial K vacancy. In the high-energy portion of the Auger spectrum, lines at 383.8 eV and 386.7 eV and a band roughly between 368 eV and 380 eV wer
K2 of n lines in the plane
โ Scribed by Barry H. Dayton; Leslie G. Roberts
- Publisher
- Elsevier Science
- Year
- 1979
- Tongue
- English
- Weight
- 869 KB
- Volume
- 15
- Category
- Article
- ISSN
- 0022-4049
No coin nor oath required. For personal study only.
๐ SIMILAR VOLUMES
Given an arrangement of n points in the plane, a k-set in the plane is a k element subset of these that can be separated from the others by a straight line. The question of how many j-sets there are with ] less than k was considered by Pach and by Goodman and Pollack [1], who obtained upper bounds o
Given a finite collection L of lines in the hyperbolic plane H, we denote by k = k(L) its Karzanov number, i.e., the maximal number of pairwise intersecting lines in L, and by C(L) and n = n(L) the set and the number, respectively, of those points at infinity that are incident with at least one line
Let F be a family of n convex sets in the plane. A set of light sources S illuminates F if every point on the boundary of each element of F is visible from at least one element in S. We prove that if F is a family of n line segments, n >/11, then [-2n/3 7 light sources are always sufficient to illum
Rend], F. and G. Woeginger, Reconstructing sets of orthogonal line segments in the plane, Discrete Mathematics 119 (1993) 1677174. We show that reconstructing a set of n orthogonal line segments in the plane from the set of their vertices can be done in O(n log n) time, if the segments are allowed
In this paper we prove that the set of positive odd integers k such that k&2 n has at least three distinct prime factors for all positive integers n contains an infinite arithmetic progression. The same result corresponding to k2 n +1 is also true.