Preimage of Intersection under Mapping/Family of Sets

Theorem
Let $S$ and $T$ be sets.

Let $\left\langle{S_i}\right\rangle_{i \in I}$ be a family of subsets of $S$.

Let $f: S \to T$ be a relation.

Then:
 * $\displaystyle f^{-1} \left({\bigcap_{i \mathop \in I} S_i}\right) = \bigcap_{i \mathop \in I} f^{-1} \left({S_i}\right)$

where $\displaystyle \bigcap_{i \mathop \in I} S_i$ denotes the intersection of $\left\langle{S_i}\right\rangle_{i \in I}$.

Proof
As $f$, being a mapping, is also a many-to-one relation, it follows from Inverse of Many-to-One Relation is One-to-Many that its inverse $f^{-1}$ is a one-to-many relation.

Thus we can apply One-to-Many Image of Intersections/Family of Sets:
 * $\displaystyle \mathcal R \left({\bigcap \mathbb T}\right) = \bigcap_{X \mathop \in \mathbb T} \mathcal R \left({X}\right)$

where here $\mathcal R = f^{-1}$.