منابع مشابه
Hartmann test of small F/# convex mirrors
A modified Hartmann test for testing aspherical convex surfaces of F/# 1 is analyzed. We present the main differences of this test in comparison to the usual Hartmann test. Theoretical results show that the transverse aberrations yielded by a testing surface have to be measured with respect to its mean sphere. A method to determine the mean sphere is also presented. Experimental results show th...
متن کاملOn Codes over $\mathbb{F}_{q}+v\mathbb{F}_{q}+v^{2}\mathbb{F}_{q}$
In this paper we investigate linear codes with complementary dual (LCD) codes and formally self-dual codes over the ring $R=\F_{q}+v\F_{q}+v^{2}\F_{q}$, where $v^{3}=v$, for $q$ odd. We give conditions on the existence of LCD codes and present construction of formally self-dual codes over $R$. Further, we give bounds on the minimum distance of LCD codes over $\F_q$ and extend these to codes ove...
متن کاملSkew cyclic codes over $\mathbb{F}_{q}+v\mathbb{F}_{q}+v^{2}\mathbb{F}_{q}$
In this article, we study skew cyclic codes over ring R = Fq + vFq + v 2 Fq, where q = p, p is an odd prime and v3 = v. We describe generator polynomials of skew cyclic codes over this ring and investigate the structural properties of skew cyclic codes over R by a decomposition theorem. We also describe the generator polynomials of the duals of skew cyclic codes. Moreover, the idempotent genera...
متن کاملHartmann 1
finished in 1797, exhibits to the viewer a skillful example of conventional late 18 th-century landscape painting. Executed in oil on canvas and measuring about 120 centimeters in width and about 80 centimeters in height, the Frenchman's picture presents a meticulously detailed view of a monastery nestled in the rolling hills of Tuscany. shows us a scene on the banks of a river outside a small ...
متن کاملBjoern Hartmann
In the first decades of the nineteenth century, a growing preoccupation with the perceived exoticism of the Orient, the geographical area equivalent to contemporary notions of Northern Africa and the Near East, emerged in France and other Western countries. While the Oriental Other had fascinated Europeans for centuries, a distinctive confluence of political events, aesthetic tastes and scienti...
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ژورنال
عنوان ژورنال: Problemos
سال: 2014
ISSN: 2424-6158,1392-1126
DOI: 10.15388/problemos.1998.53.6915