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Let $K_1, K_2, \ldots K_n$ be convex bodies in $R^d$. Assume that for any index set $I$, $\cap_{i \in I} K_i$ is not empty and is not properly contained in any body $K_i$ for $i\in I$.

Is it true that $\cap_{i \in I} \partial K_i$ is a disjoint union of topological (or even better PL) spheres?

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Let $K_1, K_2, \ldots K_n$ be convex bodies in $R^d$. Assume that for any index set $I$, $\cap_{i \in I} K_i$ is not empty and is properly contained in any body $K_i$ for $i\in I$.

Is it true that $\cap_{i \in I} \partial K_i$ is a disjoint union of topological (or even better PL) spheres?

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Let $K_1, K_2, \ldots K_n$ be convex bodies in $R^d$. (Assume some generality condition, so that in particular, for an any index set $I$, $dim(\cap_{i \cap_{i \in I} \partial K_i)=d-|I|$).

Consider an index set $I$, K_i$is not empty. Is it true that$\cap_{i \in I} \partial K_i\$ is a disjoint union of topological (or even better PL) spheres?

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