File copyright problem with File:Commutative diagram zelmerszoetrop.jpg
Thank you for uploading File:Commutative diagram zelmerszoetrop.jpg. However, it currently is missing information on its copyright status. Wikipedia takes copyright very seriously. It may be deleted soon, unless we can determine the license and the source of the file. If you know this information, then you can add a copyright tag to the image description page.
If you have uploaded other files, consider checking that you have specified their license and tagged them, too. You can find a list of files you have created in your upload log.