This file is from Wikimedia Commons and may be used by other projects.
The description on its file description page there is shown below.
Summary
DescriptionWilliam A. Stein.png
English: William A. Stein giving a talk about Sage at the 2011 Mathematics REU at the University of Washington, standing in front of a projection screen showing the Sage website
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the licence, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
https://creativecommons.org/licenses/by/3.0CC BY 3.0 Creative Commons Attribution 3.0 truetrue
This file, which was originally posted to
YouTube, was reviewed on 1 September 2011 by reviewerLymantria, who confirmed that it was available there under the stated license on that date.
Captions
Add a one-line explanation of what this file represents