some improvements

Author: thomasWeise

LICENSE.md

@@ -1,3 +1,18 @@
+This repository contains two types of material:
+Materials that I (Thomas Weise) have created by myself and such that have been created by others.
+
+The vast majority of the material is teaching material created by me (Thomas Weise).
+This and only this material is released under the Attribution-NonCommercial-ShareAlike 4.0 International license (CC BY‑NC‑SA 4.0), see below and [http://creativecommons.org/licenses/by-nc-sa/4.0](http://creativecommons.org/licenses/by-nc-sa/4.0/) for a summary.
+
+However, the repository also includes some images and figures created by others, which are marked explicitly and licensed under their authors' terms.
+For example, all logos and trademarks are under the copyright of their respective owners.
+The list of files not under the CC BY‑NC‑SA 4.0 license but under their individual owners' copyrights includes, but is not limited to:
+
++ the [Python](https://www.python.org) Logo, e.g.,
+  - text/main/introduction/pythonLogo.pdf
+  - text/main/introduction/pythonLogo.svg
+
+
 ## creative commons
 
 # Attribution-NonCommercial-ShareAlike 4.0 International

README.md

@@ -44,19 +44,29 @@ You may use these files under the licensing terms provided below.
 
 
 ## 3. License
-All the course material is freely available.
-You can download its newest version from <https://thomasweise.github.io/programmingWithPython>.
+This repository contains two types of material:
+Materials that I (Thomas Weise) have created by myself and such that have been created by others.
+
+The vast majority of the material is teaching material created by me (Thomas Weise).
+This and only this material is released under the Attribution-NonCommercial-ShareAlike 4.0 International license (CC&nbsp;BY&#8209;NC&#8209;SA&nbsp;4.0), see [http://creativecommons.org/licenses/by-nc-sa/4.0](http://creativecommons.org/licenses/by-nc-sa/4.0/) for a summary.
+
+However, the repository also includes some images and figures created by others, which are marked explicitly and licensed under their authors' terms.
+For example, all logos and trademarks are under the copyright of their respective owners.
+The list of files not under the CC&nbsp;BY&#8209;NC&#8209;SA&nbsp;4.0 license but under their individual owners' copyrights includes, but is not limited to:
+
++ the [Python](https://www.python.org) Logo, e.g.,
+  - text/main/introduction/pythonLogo.pdf
+  - text/main/introduction/pythonLogo.svg
+
+You can download its newest version of the course material from <https://thomasweise.github.io/databases>.
 This version may change since this course and book both are work in progress.
-You can freely share this.
-You can also copy text or figures under the license given below, as long as you cite the book as the original source, e.g., by using the following BibTeX:
+You can cite this book as follows:
 
 <pre>@book{programmingWithPython,<br/>&nbsp;author&nbsp;=&nbsp;{Thomas&nbsp;Weise},<br/>&nbsp;title&nbsp;=&nbsp;{Programming&nbsp;with&nbsp;Python},<br/>&nbsp;year&nbsp;=&nbsp;{2024--2025},<br/>&nbsp;publisher&nbsp;=&nbsp;{Institute&nbsp;of&nbsp;Applied&nbsp;Optimization,<br/>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<a href="http://www.hfuu.edu.cn/aibd">School&nbsp;of&nbsp;Artificial&nbsp;Intelligence&nbsp;and&nbsp;Big&nbsp;Data</a>,<br/>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<a href="http://www.hfuu.edu.cn/">Hefei&nbsp;University</a>},<br/>&nbsp;address&nbsp;=&nbsp;{Hefei,&nbsp;Anhui,&nbsp;China},<br/>&nbsp;url&nbsp;=&nbsp;{<a href="https://thomasweise.github.io/programmingWithPython">https://thomasweise.github.io/programmingWithPython</a>}<br/>}</pre>
 
 **If you have any comments or suggestions regarding the book, or if you spotted an error or typo, please feel free to submit an [issue here](https://github.com/thomasWeise/programmingWithPython/issues).**
 Your feedback would help us to improve the book.
 
-This book is released under the Attribution-NonCommercial-ShareAlike 4.0 International license (CC&nbsp;BY&#8209;NC&#8209;SA&nbsp;4.0), see [http://creativecommons.org/licenses/by-nc-sa/4.0/](http://creativecommons.org/licenses/by-nc-sa/4.0/) for a summary.
-
 We statically include the [pdfsizeopt](https://github.com/pts/pdfsizeopt) tool in the build process of our book  via the [bookbase repository](https://github.com/thomasWeise/bookbase) and use it during the book compiling and building process to compress the book pdf file.
 This tool is excluded from the license mentioned above.
 It is under the GNU GENERAL PUBLIC LICENSE Version 2, June 1991 and the copyright belongs to its authors.

text/main/introduction/introduction.tex

@@ -4,7 +4,7 @@
 \begin{figure}%
 \centering%
 \includegraphics[width=0.7\linewidth]{\currentDir/pythonLogo}%
-\caption{The logo of the programming language \python.}%
+\caption{The \href{https://www.python.org}{\python\ programming language} logo is under the copyright of its owners.}%
 \label{fig:pythonLogo}%
 \end{figure}%
 %