Can the Poincare Conjecture Simplify 3D Objects for Mathematical Calculations?

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    Conjecture Poincare
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Discussion Overview

The discussion centers on the implications of the Poincaré conjecture for simplifying three-dimensional objects into two-dimensional representations for mathematical calculations. Participants explore whether such simplifications can facilitate the use of equations typically reserved for simpler shapes, like circles or toruses.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant suggests that all three-dimensional objects can be simplified to two-dimensional shapes, questioning if equations for circles can be applied to calculate properties of these simplified forms.
  • Another participant argues that the Poincaré conjecture and topology do not pertain to the simplification of shapes for area calculations, implying that such transformations may lead to trivial results.
  • A different viewpoint states that topological objects lack a well-defined area or hypervolume, indicating that their volume can change without altering their topological properties.
  • Another participant references Perelman’s proof and Hamilton’s ideas, suggesting that imposing a metric on a manifold allows for the definition of area or volume, which could be relevant to the discussion of simplifications.

Areas of Agreement / Disagreement

Participants express differing views on the relationship between the Poincaré conjecture and the simplification of three-dimensional objects. There is no consensus on whether such simplifications are mathematically valid or meaningful.

Contextual Notes

Participants highlight limitations in defining area and volume for topological objects, as well as the potential triviality of applying circle equations to simplified shapes. The discussion remains open regarding the implications of these transformations.

MarekS
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After reading the article on Poincare's conjecture in the Economist, I became curious about simplified 3-dimensional objects.

Excerpt:

To understand the Poincaré conjecture, start by thinking of any object existing in a three-dimensional world. Although it is usual to think of the object as three-dimensional, mathematicians consider only the surface of these objects—which are two-dimensional. All objects in a three-dimensional world can be simplified by smoothing out their shape to look like either a two-dimensional sphere (otherwise known as a circle) or a two-dimensional torus with however many holes necessary. To mathematicians, a chair is equivalent to an apple; a mug—at least, one with a handle—is like a doughnut.

Let's take a cube and simplify it into a circle. Could we then use equations ment for circles for the simplified shape, ie calculate the cube's surface area using S=pii*radius²?

How would the math look like for such calculations?

MarekS
 
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Whilst you could possibly work out how areas change under certain transformations, this is not what the poincare conjecture (or topology) is about. You're just doing some complicated sums (and undoubtedly integrals) to work out something quite trivial.
 
Topological onjects don't have area (hypervolume) in any well-defined sense. You can distort them in ways that change their volume without changing their topoogical properties.
 
but the idea of peremans proof, or hamiltons idea, was to impose a metric on the manifold, and show how to deforkm the metric until it became flat. manifolds with a metric do have "area" or volume, of course
 

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