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Results tagged with convexity
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user 124831
For questions involving the concept of convexity
2
votes
Is every face exposed if all extreme points are exposed?
I believe I found a counterexample.
We first set $d=3$ and
$$
C_1:=B_1(0)\cup [0,1]\times [-1,1]\subset \mathbb R^2
\\
C_2:=C_1\times [-1,1]\subset \mathbb R^3,
$$
where $B_1(0)$ denotes the closed un …
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