Search results for "RINGS"
showing 10 items of 434 documents
«I molteplici casi della sorte». Disastri della guerra e della natura in Tucidide
2018
Il capitolo 23 del primo libro di Tucidide conclude il proemio e ricapitola gli elementi chiave della visione storiografica dello storico ateniese. Sopo aver connesso il primato della guerra alla sua durata e ad un impressionante elenco di sofferenze (pathemata) Tucidide aggiunge un secondo elenco di disastri naturali (terremoti, eclissi, la peste). Questo contributo si propone di indagare il rapporto tra le due serie di disastri nel quadro della più ampia visione tucididea sulla guerra e sulla condotta umana. Accostando ai pathemata l’elenco dei disastri naturali, lungi dal volere individuare nella straordinaria sovversione dell’ambiente naturale un effetto delle decisioni umane o un annun…
I thermà loutrà di Termini Imerese dalla presenza mitica di Eracle alle terme romane
2019
Le sorgenti calde di Termini Imerese sono legate nel mito raccontato da Diodoro alla presenza di Eracle fin dall'età arcaica. La popolarità dell'eroe nell'isola è confermata dall'evidenza archeologica non solo nella colonia greca di Himera, ma anche nel suo territorio. E' probabile che un edificio termale esistesse nell'area prima dell'età romana, ma è solo dopo la deduzione di una colonia romana a Thermae in età augustea che venne costruito un edificio monumentale riccamente decorato, messo parzialmente in luce da recenti scavi. The thermal springs of Termini Imerese are linked in myth to the presence of Herakles from the Archaic period. The relationship between the tale told by Diodoros o…
Finite Commutative Rings and Their Applications
2002
Finite Commutative Rings and their Applications is the first to address both theoretical and practical aspects of finite ring theory. The authors provide a practical approach to finite rings through explanatory examples, thereby avoiding an abstract presentation of the subject. The section on Quasi-Galois rings presents new and unpublished results as well. The authors then introduce some applications of finite rings, in particular Galois rings, to coding theory, using a solid algebraic and geometric theoretical background.
Conjugately dense subgroups in generalized $FC$-groups
2009
MR 3219513 Reviewed Venkataramana T. N. Monodromy of cyclic coverings of the projective line. Invent. Math., 197 (2014), 1–-45. (Reviewer Francesca V…
2014
Let $d \geq 2$ and $n \geq 1$ be integers and $P_{n+1}$ be the pure braid group on $n + 1$ strands. In this paper, the author studies the image of $P_{n+1}$ under the monodromy action on the homology of a cyclic covering of degree $d$ of the projective line. More precisely, let $k_{1}, \ldots, k_{n + 1}$ be integers such that $1 \leq k_{i} \leq d - 1$ and gcd$(k_{i}, d) = 1$ for each $i$. Moreover, let $a_{1}, \ldots, a_{n + 1}$ be distinct points of the complex plane and $C$ be the space of points in $\mathbb{C}^{n + 1}$ with all distinct coordinates. Let us denote by $X_{a, k}$ the affine curve defined by the equation $$ y^{d} = (x - a_{1})^{k_{1}} (x - a_{2})^{k_{2}} \cdots (x - a_{n +1}…
Signal integrity studies at optical multiplexer board for TileCal system
2007
6 pages.-- ISI Article Identifier: 000253651800006
The space age and the origin of space research
2001
The exploration of space is one of the greatest achievements of the twentieth century. In the ideal photo album of this century one could hardly avoid including such pictures as our blue planet seen from space and the human footprint on the Moon’s surface; the close-up images of a comet’s nucleus and the rough landscape of Mars; the floating of astronauts in the black vacuum around a space station and the rings of Saturn photographed from an approaching spacecraft.
Hydration/elimination reactions of trapped protonated fluoroalkyl triazines
2007
Triply Factorised Groups and the Structure of Skew Left Braces
2021
The algebraic structure of skew left brace has proved to be useful as a source of set-theoretic solutions of the Yang–Baxter equation. We study in this paper the connections between left and right $$\pi $$ -nilpotency and the structure of finite skew left braces. We also study factorisations of skew left braces and their impact on the skew left brace structure. As a consequence of our study, we define a Fitting-like ideal of a left brace. Our approach depends strongly on a description of a skew left brace in terms of a triply factorised group obtained from the action of the multiplicative group of the skew left brace on its additive group.
Quantum Ring in a Magnetic Field: High Harmonic Generation and NOT Logic Gate
2020
The effect of a static magnetic field on the high harmonic generation (HHG) from a quantum ring driven by one laser polarized along the x-axis is studied. The spin polarization (Formula presented.) and the temporal emission of the harmonics are studied by varying the intensity of the magnetic field and it is shown how these results have a significant technological impact in computer technology; in fact a boolean algebra can be implemented by assigning 0 and 1 values to low and high pulse intensities of the emitted harmonics and logic gates like the NOT can be created.