along. This problem was considered in [@KotschwarRFHolonomy] within the class of complete solutions of bounded curvature.

Whereas the problem of the propagation of the Kähler structure forward in time can, in principle, be reduced to the uniqueness of solutions to the Ricci flow by the construction of Kähler solutions with the same initial data, the problem of its propagation backward in time does not seem to admit a correspondingly straightforward reduction to the backward uniqueness of solutions. The Kähler solutions which one would need to construct to act as competitors are now the solutions to parabolic *terminal-value* problems which are ill-posed in general. These obstacles are discussed in some detail in Section 2.3 of [@KotschwarRFHolonomy] in the context of the preservation of holonomy along the flow.

Instead, the problem of backward propagation of restricted holonomy in [@KotschwarRFHolonomy] is recast as one of backward uniqueness for a prolonged system encoding the components of the curvature operator relative to a certain decomposition of the bundle of two-forms on $M$. In the next section, we discuss the specialization of this formulation to the Kähler setting. This sets up a problem of backward uniqueness which, analytically, turns out to be identical in structure and 