Author: Urs Format: MarkdownItexstarting something, for the moment mostly a list of references, and these mostly on the $\mathbb{C}P^1$-case
<a href="https://ncatlab.org/nlab/revision/CP%5EN+sigma-model/1">v1</a>, <a href="https://ncatlab.org/nlab/show/CP%5EN+sigma-model">current</a>
starting something, for the moment mostly a list of references, and these mostly on the -case