The Stacks project

Definition 42.37.1. Let $(S, \delta )$ be as in Situation 42.7.1. Let $X$ be locally of finite type over $S$. Let $\mathcal{E}$ be a finite locally free sheaf of rank $r$ on $X$. We define, for every integer $k$ and any $0 \leq j \leq r$, an operation

\[ c_ j(\mathcal{E}) \cap - : Z_ k(X) \to \mathop{\mathrm{CH}}\nolimits _{k - j}(X) \]

called intersection with the $j$th Chern class of $\mathcal{E}$.

  1. Given an integral closed subscheme $i : W \to X$ of $\delta $-dimension $k$ we define

    \[ c_ j(\mathcal{E}) \cap [W] = i_*(c_ j({i^*\mathcal{E}}) \cap [W]) \in \mathop{\mathrm{CH}}\nolimits _{k - j}(X) \]

    where $c_ j({i^*\mathcal{E}}) \cap [W]$ is as defined in Definition 42.36.1.

  2. For a general $k$-cycle $\alpha = \sum n_ i [W_ i]$ we set

    \[ c_ j(\mathcal{E}) \cap \alpha = \sum n_ i c_ j(\mathcal{E}) \cap [W_ i] \]

Comments (0)

There are also:

  • 2 comment(s) on Section 42.37: Intersecting with Chern classes

Post a comment

Your email address will not be published. Required fields are marked.

In your comment you can use Markdown and LaTeX style mathematics (enclose it like $\pi$). A preview option is available if you wish to see how it works out (just click on the eye in the toolbar).

Unfortunately JavaScript is disabled in your browser, so the comment preview function will not work.

All contributions are licensed under the GNU Free Documentation License.

In order to prevent bots from posting comments, we would like you to prove that you are human. You can do this by filling in the name of the current tag in the following input field. As a reminder, this is tag 02U5. Beware of the difference between the letter 'O' and the digit '0'.