Author: Urs Format: MarkdownItexstarting to collect references on string/M-theory compactifications on K3-compactifications ([here](https://ncatlab.org/nlab/show/K3+surface#InStringTheory)). Am also touching related entries such as _[[Moonshine]]_ etc.
<a href="https://ncatlab.org/nlab/revision/diff/K3+surface/14">diff</a>, <a href="https://ncatlab.org/nlab/revision/K3+surface/14">v14</a>, <a href="https://ncatlab.org/nlab/show/K3+surface">current</a>
starting to collect references on string/M-theory compactifications on K3-compactifications (here). Am also touching related entries such as Moonshine etc.
Author: Urs Format: MarkdownItexadded statement of the integral cohomology in all degrees, with pointer to a proof
<a href="https://ncatlab.org/nlab/revision/diff/K3+surface/17">diff</a>, <a href="https://ncatlab.org/nlab/revision/K3+surface/17">v17</a>, <a href="https://ncatlab.org/nlab/show/K3+surface">current</a>
added statement of the integral cohomology in all degrees, with pointer to a proof
Author: Urs Format: MarkdownItexadded statement of a few characteristic classes of $K3$ and of $K3 \times K3$ ([here](https://ncatlab.org/nlab/show/K3+surface#CharacteristicClasses))
<a href="https://ncatlab.org/nlab/revision/diff/K3+surface/24">diff</a>, <a href="https://ncatlab.org/nlab/revision/K3+surface/24">v24</a>, <a href="https://ncatlab.org/nlab/show/K3+surface">current</a>
added statement of a few characteristic classes of $K3$ and of $K3 \times K3$ (here)