Starts 12 Sep 2019 14:30
Ends 12 Sep 2019 16:00
Central European Time
ICTP
Leonardo Building - Euler Lecture Hall
Abstract. We formulate explicitly the necessary and sufficient conditions for the local invertibility of a field transformation involving derivative terms. Our approach is to apply the method of characteristics of differential equations, by treating such a transformation as differential equations that give new variables in terms of original ones. The obtained results generalise the well-known and widely used inverse function theorem. Taking into account that field transformations are ubiquitous in modern physics and mathematics, our criteria for invertibility will find many useful applications.