Asking questions of Yuxi Fu

Yuxi Fu, Shanghai Jiao Tong University, (C9) Shanghai, China

Homepages(s): Chinese Academy of Science, More to come
Publications (among many, these are a few documents): Thesis for Interaction (2021), A functional presentation of Pi calculus (2001), Symmetric π-calculus (1998)

References within this website:
(More come)

Third email: January 3, 2023 at 10:23 AM

Dear Prof. Dr. Yuxi Fu:

Thank you again for all your most thoughtful work. My working page about your work is now public: and there is a reference here:  Since sending the originals, small edits have been made to each document.

On my first visit to China, I was in Beijing to meet with steel manufacturing people and then down to Hong Kong to visit with family friends. In 2010 I had hoped to join my friend and the head of Boston University’s physics department when he donated his library to Tsinghua. More recently I had hoped to open a channel of communication with Andrew Chi-Chih Yao. I have had helpful exchanges with Chaunming Zong of Tianjin Center for Applied Mathematics (TCAM) and Xijia Wang of Hunan.

As the world continues to shrink and more and more scholarly work is shared, those shared insights and concepts will bring even more people together.  It is a very special time in the life of our little world. Moving from our very limited worldviews to a highly-integrated, mathematical view of the universe is important. It is common ground. Although big bang cosmology (bbc) is the de facto core concept of cosmology, when it begins to shift to foundationally more simple concepts, ostensibly those considered de jure, i.e. dimensionless constants like pi and our universal constants, we will all slowly shift and the solipsism of the bbc will begin to subside and a more gentle understanding of who we are and why will begin to emerge. 

Again, let me thank you for all your scholarly work.



PS. I have been spending time using Google Maps to visit your cities and have had a fine time exploring the ins-and-outs of neighborhoods around Shanghai Jiao Tong University as well as other schools within the C9. Most beautiful and most impressive. -BEC

Second email: December 28, 2022 at 3:54 PM

Dear Prof. Dr. Yuxi Fu:

In the Thesis for Interaction (2021) you open with a quote from David Deutsch who suggests that our current theories of computation are too abstract because that are based on “pure” logic and mathematics that has nothing to do with physical processes. I would challenge David on his definition of the very nature of physicality, “Are the Planck base units physical?” I think we would all agree that they are.

That begs the next question about nature of a “value-passing communication mechanism.” What might be some of the functional mechanisms for an information exchange communication?“, an initial discussion about which I found in Section 5, Conclusion and Variations, page 208, J. of Comput. Sci. & Tech. V1.13, 1998.

Today, right now, I am of the mind that the essence of information doesn’t exist in the finite; it is all contained with an infinite universe defined by continuity, symmetry and harmony. It doesn’t exist in the physicality of the computer, but in the mind of the participant or a dynamic equation. The finite-infinite relation is always and it is always dynamic. That would change the nature of the equations. Assuredly, the initial conditions would not be defined by big bang cosmology.

I’ll continue my path through your works and may change my mind, but wanted to again thank you for your work and for causing me to go over it all just one more time.

Warm regards,


First email: December 27, 2022 at 7:36 PM (lightly update)

Dear Prof. Dr. Yuxi Fu:

Your paper, Symmetric π-calculus from 1998, has come to my attention. It prompts me to ask you, “Could continuity, symmetry, and harmony be a proper description of the functional nature of pi?”  I am now studying the references within your website,

Years ago, I could see how it all might evolve from the most simple sphere:  I wondered, “Do the Planck base units define the first infinitesimal sphere? If so, is sphere stacking-and-packing a fundamental of physicality?”

If base-2 is applied, there are just 202 doublings to the approximate age and size of the universe and wave-particles-fluctuations are not measured until Notations-64 to Notation-67. The first second isn’t until Notation-143. So, of course, our chart of numbers is primarily a description of the very early universe. Is this interesting? Thank you.

Most sincerely,


PS. Along the way, we found a very interesting gap with five-octahedrons. Aristotle had failed to see the gap with five tetrahedrons! Nobody seems to be aware that five octahedrons create the same gap!  Even the commercial geometric construction sets and computer programs overlook these gaps!  -BEC