racah 0.1.0

The Racah algebra, compiled — spectroscopy layer of the spectrafold Origami ISA engine.

racah

The Racah algebra, compiled.

This package is the spectroscopy-specialised layer of spectrafold.

pip install spectrafold   # the full library
pip install racah         # this stub (re-exports spectrafold)

import racah

racah.flop(0, 1, 1, 1, 1, 1)    # 6j symbol {0 1 1; 1 1 1} = -1/3
racah.pandya_transform(...)       # Pandya transform as FLIP;FLOP
racah.g2_casimir(1, 0)            # G2 Casimir for the fundamental 7-dim irrep

All results are exact sympy expressions — no floats, no rounding.

Papers

Paper	DOI
347 Spiders for Spectra	10.5281/zenodo.20458996
348 Spiders for Nuclei	10.5281/zenodo.20490046
349 The Origami Calculus	10.5281/zenodo.20474914
350 Spiders for Quarkonium	10.5281/zenodo.20490294

License

MIT. Author: Ian R. C. Buckley.