Solitons: Differential equations, symmetries, and infinite-dimensional algebras
《Solitons: Differential equations, symmetries, and infinite-dimensional algebras》 · 第 65 页 · Exercise 2.14
Let $X$ be a topological space and $i:Z\to X$ the inclusion of a subspace $Z$. Let $\mathcal F$ be a sheaf on $Z$. If $Z=\{x\}$ for some point $x\in X$ and $E$ is the value of $\mathcal F$ on $Z$, then $i_*\mathcal F$ is called the skyscraper sheaf in $x$ with value $E$.