An important result is that for linear functionsf it is possible to recovers from observationsx up to certain symmetries, i.e., the model isidentifiable [8].
Let t beanother F analytic in t suchthat 0 = f0 and ( t) =( ft) forallt. Intherightfigurea volumepreservingtransfor applied (see Appendix C). 3: Smoothinvariantdeformations.