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location United Kingdom
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visits member for 3 years, 10 months
seen Nov 17 at 17:17

Have D.Phil in Mathematical Physics from 25 years ago.

I also like to work in the mathematical foundations of Computer Science and AI. I would be interested to find a merger of work in all three areas....

I am currently updating my understanding of mathematics fundamentals (Set Theory, Reverse Mathematics, Mathematical Logic, etc) and looking at non-standard ideas there to see if any might provide a basis for a different framework for understanding Quantum Theory.


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Jan
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comment From differentials to differential equations
@Guido, Actually your discrete problem looks like a kind of "one way diffusion". I wonder whether modelling it on a Cellular Automata framework would be possible?
Jan
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answered From differentials to differential equations
Jan
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comment Deriving group velocity
I have extended this answer to cover some background to the calculation.
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revised Deriving group velocity
added 1389 characters in body
Jan
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comment Does the Banach-Tarski paradox contradict our understanding of nature?
Ron, Does not the Solovay model require assuming the existence of an Inaccessible Cardinal? If (mathematical) physics is to be described better with Solovay, then do you have an interpretation for this Inaccessible object?
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answered Deriving group velocity
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Apr
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comment Can the Big Rip really rip apart an atomic nucleus?
So to summarise this conclusion in terms of the actual question:(1) The Big Rip will happen (up to atom scale at least);(2) Cosmological isotropy assumptions dont make any difference - the basic theory is sound;(3) Nuclear Rip may or may not happen. Is this the "correct picture"?
Apr
12
comment Investigating damped Harmonic Motion in a Spring?
These two questions are obviously linked: physics.stackexchange.com/questions/8402/…
Apr
12
comment Reactionless Drives
"photons have no mass" - some formulae: photon frequency $\omega$, Energy = $\hbar \omega$= pc. So momentum p=$\hbar \omega/c$. One could even associate the "mass" m=p/c = $\hbar \omega/c^2$. Rest mass is zero.
Apr
12
comment Is there an energy density limit in GR?
Here is a scientific discussion of density with SI units and some actual values: en.wikipedia.org/wiki/Density. So the claim that you appear to make that this concept (density - mass density $\rho$) has no invariant or physical or laboratory meaning doesnt make sense to me.