Remark 42.23.5. Let $(S, \delta )$ be as in Situation 42.7.1. Let $X$ be a scheme locally of finite type over $S$. We will see later (in Lemma 42.69.3) that the map

of Lemma 42.23.4 is injective. Composing with the canonical map

we obtain a canonical map

We have not been able to find a statement or conjecture in the literature as to whether this map should be injective or not. It seems reasonable to expect the kernel of this map to be torsion. We will return to this question (insert future reference).

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