Transform Calc on S^3 to S^2: Maifold Calculus

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Discussion Overview

The discussion revolves around the transformation of calculations on the 3-sphere (S^3) to the 2-sphere (S^2), particularly focusing on integrals and potential applications of the Hopf fibration. The scope includes theoretical aspects of manifold calculus and mathematical reasoning related to integration on manifolds.

Discussion Character

  • Exploratory
  • Technical explanation
  • Mathematical reasoning

Main Points Raised

  • One participant inquires about transforming calculations from S^3 to S^2, specifically mentioning integrals and Fourier transforms.
  • Another participant introduces the Hopf map, describing how R^4 can be viewed as C^2 and how complex lines in C^2 correspond to S^2, thus relating S^3 to S^2 through this fibration.
  • A participant expresses a specific problem involving an integral on S^3 and seeks methods to compute it both on S^3 and transformed to S^2.
  • One suggestion is to generalize the Fubini theorem, proposing to integrate over the fibers (circles) first before integrating over S^2, contingent on the integrand's behavior with respect to the complex circles in the Hopf fibration.
  • Another participant mentions the Maple Atlas package as a potential tool for performing calculations related to manifolds and their mappings.

Areas of Agreement / Disagreement

Participants present various approaches and suggestions without reaching a consensus. Multiple competing views on how to handle the transformation and integration remain evident.

Contextual Notes

There are limitations regarding the assumptions necessary for applying the Fubini theorem in this context, as well as the specific conditions under which the integrand respects the structure of the Hopf fibration.

htaati
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how can I transform my calculation on S^3 to the S^2.
for example a trace or a Fourier transform
 
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hopf map? consider R^4 as C^2, the complex 2 space, and consider all complex "lines" in C^2. this family of complex subspaces is homeomorphic to S^2, hence this fibres S^3 over S^2 with fibers equal to circles. this is the famous hopf map from S^3 to S^2.
 
manifold calculus

mathwonk said:
hopf map? consider R^4 as C^2, the complex 2 space, and consider all complex "lines" in C^2. this family of complex subspaces is homeomorphic to S^2, hence this fibres S^3 over S^2 with fibers equal to circles. this is the famous hopf map from S^3 to S^2.


well my problem is: I have an integral in S^3 . I want to calculate this integral.
i) in S^3.
ii) how can I transform this integral to S^2.

If you think that you need more explanation I would be glad to
sent it for you.
 
you might try to generalize the fubini theorem, i.e. integrate over the fibering circles first and then integrate those integrals over the 2 sphere.

but this is only indicated if the quantity being integrated somehow restects the compex circles in the hopf fibration.
 
May be Maple atlas package can help to make some real calculations.
See http://www.mathshop.digi-area.com/prod/atlas/index.php
It can make calculations for manifolds and mapping one into another.
 
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