Version 6.9 of the Notes on Diffy Qs is up on the website

[Jiří Lebl]

I ran the book through Gemini (the Google AI) and it found a number of previously  unknown errata.  Note that I haven't used the AI to generate anything, just asked it to identify errors, and it is surprisingly good in that (you still have to be quite careful, it often misreads or makes an error, or even sometimes makes things up entirely).  Since I was editing, I made a couple of very minor enhancements, including a couple of new exercises.  Other than that, there really is no new material.

See https://www.jirka.org/diffyqs/

List of changes: https://www.jirka.org/diffyqs/changes.html

Best,

Jiri