Cantors Influence on Theoretical Physics

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SUMMARY

The discussion centers on the influence of Georg Cantor's set theory on theoretical physics, particularly regarding the concept of infinity. The participant highlights the paradox of treating infinite quantities in algebra, noting that while basic algebra suggests 1x + 1x = 2x, the introduction of infinity complicates this to 1x + 1x = 1x. The conversation critiques the application of Cantor's different infinities in theoretical physics and cosmology, emphasizing the need for clarity in understanding how these mathematical concepts impact scientific theories, especially concerning the nature of the universe and gravity.

PREREQUISITES
  • Understanding of basic algebraic principles
  • Familiarity with Cantor's set theory
  • Knowledge of theoretical physics concepts, particularly cosmology
  • Awareness of the implications of infinity in mathematics and physics
NEXT STEPS
  • Research the implications of Cantor's set theory on modern physics
  • Explore the concept of infinity in mathematical contexts
  • Investigate theories in cosmology that rely on Cantorian mathematics
  • Study the relationship between quantum mechanics and gravitational theories
USEFUL FOR

The discussion is beneficial for mathematicians, theoretical physicists, and students of cosmology who seek to understand the foundational mathematical concepts that underpin modern scientific theories, particularly those involving infinity and set theory.

SimonA
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If I start with basic algebra, I get rules that suggest;

1x+1x=2x

Then I consider the 'no end' scenario, and say that if x is infinite;

1x+1x=1x

And so I decide that infinity is a 'special case'.

Then I get really clever and use something called set theory, which is pretty reliable, and use it to show that two sets of inifinite items can have one with an infinite number of items for ever item in the other set (real numbers versus integer numbers for example).

And so suddenly (in a round about way) I believe that even if x is infinite;

1x+1x=2x

even though the numerical value of x is still tied to its definition in being undefinably quantifyable.

We now get people who believe in the big bang and yet say that the universe is spacially infinite. On the scientific side the only question on this is the shape of space. A spinning top that went around and around for ever has no relevance to the spatial extent of its environment.

To me this big mistake seems to pervade theoretical physics and cosmology far more than it deserves to. Infinities are where something runs on for ever. This is an unquantifyable value, and Cantors different infinities replace the equals sign, with all its amazing symmetry, with something significantly different.

How difficult would it be to get a list of theories which rest on Cantor's maths ?

Regards

Simon
 
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SimonA said:
How difficult would it be to get a list of theories which rest on Cantor's maths ?

Simple: the empty set.
 
Thats very usefull to know - many thanks

I'll leave my concerns with Cantors infinities behind by classing them as 'statistics' rather than pure maths, and concentrate on these issues with gravity and a complete lack of explanation for behaviour at a quantum level.
 

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