Jason Resch skrev:
> I am not sure how related this is to what you ask in your original 
> post, but as for a model (and candidate TOE) of physics which is 
> discrete, there is a theory known as Hiem Theory 
> ( http://en.wikipedia.org/wiki/Heim_Theory ) which posits there are 
> six discrete dimensions.  Interestingly, the theory is able to predict 
> the masses of many subatomic particles entirely from some force 
> constants, something which even the standard model is unable to explain.

I have now looked at Heim Theory, but it does not look enough serious to 
me.  Every theory that compute the masses of the elementary particles 
from nothing, must be wrong.  Because in different possible universa the 
masses of the elementary particles are different.  Besides, the Heim 
Theory could not explain the quarks.

But from the Heim Theory article I followed a link to "Difference 
operator" ( http://en.wikipedia.org/wiki/Difference_operator ), and that 
article was much more interesting, because there you could find the 
extended Leibniz rule.

And from that article I found a link to "Umbral calculus" ( 
http://en.wikipedia.org/wiki/Umbral_calculus ), that look like exactly 
what I am looking for.  The Umbral calculus seems to be a good candidate 
for a tool for handling discrete space-time!

Torgny Tholerus

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