plethysm-code

plethysm-code is the SageMath implementation accompanying the paper “Plethysm for characters of relative operads and PROPs”. It extends SageMath’s symmetric-function operations to several alphabets and implements the character computations of the paper. The repository includes a Jupyter notebook with a PDF export, LaTeX formatting of irreducible decompositions, and scripts for computing and loading exact character tables, including the character of $\mathcal{H}'_n$ for $n \leq 10$.

The original Mathematica Lambda package and its GAP scripts for producing symmetric-group character tables remain available in the mathematica/ directory, with documentation explaining their correspondence with the SageMath implementation.