Ambiguity, Invisibility, and Negativity
arXiv:2309.04882
Abstract
Many widely different problems have a common mathematical structure wherein limited knowledge lead to ambiguity that can be captured conveniently using a concept of invisibility that requires the introduction of negative values for quantities that are inherently positive. Here I analyze three examples taken from perception theory, rigid body mechanics, and quantum measurement.
9 pages, no figures. Contribution to Stanley Deser memoriał volume "Gravity, Strings and Beyond"