Re [this paper](https://www.tandfonline.com/doi/full/10.1080/02664763.2025.2490967). Basically: Generic coordinate + auxiliary variables in $\mathbb{R}^n \to \text{PCA} \to \mathbb{R}^2 \to \text{GRTS}$
Re this paper.
Basically: Generic coordinate + auxiliary variables in$\mathbb{R}^n \to \text{PCA} \to \mathbb{R}^2 \to \text{GRTS}$