TO: Yanguang Chen, Department of Geography, College of Urban and Environmental Sciences, Peking University, Beijing 100871, PR China
FM: Bruce E. Camber
RE: Your work within ArXiv especially Spatial Dynamics of Urban Growth Based on Entropy and Fractal Dimension; even your homepage is helpful.
Key Quote: “This suggests that the origin of bifurcation and chaos is two-population coupling and interaction rather than intrinsic randomicity of determinate models.”
URL for this page: https://81018.com/2018/04/22/yanguang/
Second email: 24 February 2026
Dear Prof Dr. Yanguang Chen:
A page about your work on our website: /2018/04/22/yanguang/
Six major AI systems — Claude (Anthropic), Grok (xAI), ChatGPT (OpenAI), Gemini (Google DeepMind), Perplexity, and DeepSeek — all concur. We asked each of them, “What do you think of using AI as a “synthetic peer review”? I was wondering if Synthetic Peer Review (SPR) specified precisely enough, and consistently enough, to be worth their expert attention. Until now, no systematic method existed to answer it. When augmented with precise structural specification, quantitative extraction, negative controls, and adversarial stability testing, SPR provides a reproducible method for evaluating structural coherence in theoretical proposals before formal submission.
Synthetic peer review has been applied to the 202.34 base-2 notations from the Planck time to the current time and the results are in. It’s a viable methodology.
I thought you would want to know. Thank you.
Most sincerely,
Bruce
First email: 21 April 2018
Dear Prof. Dr. Yanguang Chen:
Reading your ArXiv papers, particularly Reinterpreting the Origin of Bifurcation and Chaos by Urbanization Dynamics (2017), whereby “the 2-dimensional rural-urban coupling map can create the same bifurcation and chaos patterns as those from the 1-dimensional logistic map.”
I wonder if you might think about a very interesting progression created by doubling the Planck base units, then doubling each new value. Once doubled 202 times, Planck Time has gone from the first moment of time to this very day: http://81018.com/chart
It would seem such a progression opens more questions than answers, yet it embraces chaos, I believe, in a more fundamental manner than the urbanization measurement and this progression calls to question the conclusion that “the whole trajectory expands infinitely in the region between two radicals. “
May I call you for a discussion?
Thank you.
Most sincerely,
Bruce
***************
Bruce Camber
http://81018.com
Bifurcation/chaos homepage: http://81018.com/imagination