Folding of quadrilaterals, zigzags, and Arnold-Liouville integrability
arXiv:2507.17549
Abstract
We put Darboux's porism on folding of quadrilaterals, as well as closely related Bottema's zigzag porism, in the context of Arnold-Liouville integrability.
arXiv comment5 pages, 7 figures, accepted to Arnold Mathematical Journal