Simmetry properties of Racah’s coefficients

  title={Simmetry properties of Racah’s coefficients},
  author={Tullio Eugenio Regge},
  journal={Il Nuovo Cimento (1955-1965)},
  • T. Regge
  • Published 1959
  • Physics
  • Il Nuovo Cimento (1955-1965)

Determining Generic Point Configurations From Unlabeled Path or Loop Lengths

Let $\mathbf{p}$ be a configuration of $n$ points in $\mathbb{R}^d$ for some $n$ and some $d \ge 2$. Each pair of points defines an edge, which has a Euclidean length in the configuration. A path is

Linear Symmetries of the Unsquared Measurement Variety

We introduce a new family of algebraic varieties, $L_{d,n}$, which we call the unsquared measurement varieties. This family is parameterized by a number of points $n$ and a dimension $d$. These

Computational Science and Its Applications – ICCSA 2017

This work proposes a supervised learning technique to estimate the probability that a new well will be low in arsenic based on its location and depth, and combines data from villages with similar characteristics, which is called the Sister-Village method.

Regge symmetry of 6-j or super 6-jS symbols: a re-analysis with partition properties

It shown that the five Regge transformations act as a spectrometric splitter on any 6-j symbol. Four unknown partitions are brought out: S4(0), S4(1), S(2) and S4(5). They are stable subsets, with

Symmetric coupling of angular momenta, quadratic algebras and discrete polynomials

Eigenvalues and eigenfunctions of the volume operator, associated with the symmetric coupling of three SU(2) angular momentum operators, can be analyzed on the basis of a discrete Schrödinger–like

Space vectors forming rational angles.

We classify all sets of nonzero vectors in $\mathbb{R}^3$ such that the angle formed by each pair is a rational multiple of $\pi$. The special case of four-element subsets lets us classify all

Intricate partial waves in nuclear scattering

  • H. Geramb
  • Physics
    The European Physical Journal A
  • 2020
This article is meant as an encomium of the life-span endeavor of Jacques Raynal to relate nuclear scattering density matrices with numerical methods. The mathematical investigations he made involved

Quadrupolar interactions between acceptor pairs in p -doped semiconductors

We consider the interaction between acceptor pairs in doped semiconductors in the limit of large inter-acceptor separation relevant for low doping densities. Modeling individual acceptors via the

9 j -Coe ffi cients and higher

3 j-Coefficients (or 3 j-symbols), 6 j-coefficients, 9 j-coefficients and higher (referred to as 3n jcoefficients) play a crucial role in various physical applications dealing with the quantization