ON URBAN RE-ARRANGEMENTS: A Suite in Five Movements

This movement introduces the ethos of the collective project: its conceptual and practical preoccupations. It focuses on our concern with urban processes on the cusp of change, in the midst of being re-arranged, and thus homes in on the various polyrhythms of intersections, how things come together and diverge, how possibilities open and close in urban contexts of continuously shifting horizons.     

Optional projection under equivalent local martingale measures

We study optional projections of \({\mathbb{G}}\)-adapted strict local martingales on a smaller filtration \({\mathbb{F}}\) under changes of equivalent martingale measures. General results are provided as well as a detailed analysis of two specific examples given by the inverse Bessel process and a class of stochastic volatility models. This analysis contributes to clarify the absence of arbitrage opportunities of market models under restricted information.