Unwelcome news via Mark Johnson passed to the CYBCOM mailing list:
I am deeply sorry to write to inform you that Prof. Loet Leydesdorff died on Saturday morning. I’m sure many within the cybernetics community will share a deep sense of loss. .
Others will have better-informed tributes than I – and they are very welcome to post them here, and if I find them, I will share. But his work on knowledge-based economies, innovation, and growth (triple- and n-helix models) was globally recognised, and his work on Luhrmann, constructivism, redundancy and information theory, and application of the latter to music was truly interesting. A true multi-skilled, insight-generating cybernetician.
Here’s a brief introduction – by him – to his 2020 book
Other canonical links (starting with his website):
https://www.leydesdorff.net/
https://scholar.google.com/citations?user=ych9gNYAAAAJ&hl=en
https://en.wikipedia.org/wiki/Loet_Leydesdorff
https://www.researchgate.net/profile/Loet-Leydesdorff/research
https://en.wikipedia.org/wiki/Loet_Leydesdorff
https://cepa.info/author/leydesdorff-l
There are also interesting posts and already one tribute post on his facebook page:
https://www.facebook.com/loet.leydesdorff/
Some relevant references from syscoi.com:
https://stream.syscoi.com/2021/01/31/towards-a-calculus-of-redundancy-leyersdorff-2021/
https://stream.syscoi.com/2021/04/27/the-evolutionary-dynamics-of-discursive-knowledge-leyersdorff-2021-open-access-book/
and (very interesting, and just shared because I found a legal download link):
https://stream.syscoi.com/2023/03/13/beers-viable-system-model-and-luhmanns-communication-theory-organizations-from-the-perspective-of-metagames-johnson-and-leydesdorff-2013/
Systems Community of Inquiry 