Exercise 111.48.2. Let k be a field. Let X = \mathbf{P}^ n_ k. Let Z \subset X be a closed k-rational point viewed as a closed subscheme. For example the point with homogeneous coordinates (1 : 0 : \ldots : 0). Compute the dimensions of
\mathop{\mathrm{Ext}}\nolimits ^ i_ X(\mathcal{O}_ Z, \mathcal{O}_ Z)
for all i.
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