## Symmetries in Wigner 18-J and 21-J Symbols

**Authors:** Richard J. Mathar

The symmetry group of the 18-j(H) Wigner symbol is restructured by splitting two symmetry
equations (Yutsis et al. 1962) into three generators. The symmetry groups of two 21-j Wigner
symbols (Ponzano 1965) are complemented to form groups of order 8. This summarizes systematic
evaluation of the automorphisms of the associated simple cubic graphs with McKay’s nauty program.

**Comments:** 8 Pages. Removed a duplicated figure in version 2.

**Download:** **PDF**

### Submission history

[v1] 2012-02-29 14:23:52

[v2] 2012-12-04 06:11:53

**Unique-IP document downloads:** 92 times

**Add your own feedback and questions here:**

*You are equally welcome to be positive or negative about any paper but please be polite. If you are being critical you must mention at least one specific error, otherwise your comment will be deleted as unhelpful.*

*
*