Volume of a closed surface (divergence theorem)

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Discussion Overview

The discussion centers around the calculation of the volume of a closed surface and its relation to established theorems like Green's theorem. Participants explore whether there exists a formula analogous to Green's theorem for volume calculations, particularly in the context of surface integrals.

Discussion Character

  • Exploratory
  • Technical explanation
  • Mathematical reasoning

Main Points Raised

  • One participant inquires about the existence of a formula for calculating the volume of a closed surface, similar to the area calculation in Green's theorem.
  • Another participant mentions that Green's and Stokes' theorems can be applied to surface integrals, indicating that the mathematics involved is more complex.
  • One participant proposes a formula for volume calculation involving multiple integrals over a surface, questioning its correctness.
  • A later reply reiterates the proposed volume formula and seeks confirmation of its accuracy.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the existence of a formula analogous to Green's theorem for volume calculations, and there is uncertainty regarding the correctness of the proposed volume formula.

Contextual Notes

The discussion includes references to specific mathematical documents and formulas, but lacks clarity on the assumptions or definitions required for the proposed volume calculations.

Jhenrique
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Green's and Stokes' theorems can by used on surface integrals, just like they are used for 2-D integrals.

The math is a little more complex, however.

Google: 'line surface and volume integrals'
 
I am searching for something similar to this:
f76df7ea16919c17fe62cef9eb303fd7.png



EDIT: I think that the volume can be calculated by:
V=\iint_{S}\!\!\!\!\!\!\!\!\!\!\!\subset\!\supset xdydz = \iint_{S}\!\!\!\!\!\!\!\!\!\!\!\subset\!\supset ydzdx = \iint_{S}\!\!\!\!\!\!\!\!\!\!\!\subset\!\supset zdxdy = \frac{1}{3}\iint_{S}\!\!\!\!\!\!\!\!\!\!\!\subset\!\supset (xdydz+ydzdx+zdxdy)

Correct?
 
Last edited:
Jhenrique said:
V=\iint_{S}\!\!\!\!\!\!\!\!\!\!\!\subset\!\supset xdydz = \iint_{S}\!\!\!\!\!\!\!\!\!\!\!\subset\!\supset ydzdx = \iint_{S}\!\!\!\!\!\!\!\!\!\!\!\subset\!\supset zdxdy = \frac{1}{3}\iint_{S}\!\!\!\!\!\!\!\!\!\!\!\subset\!\supset (xdydz+ydzdx+zdxdy)

This equation is really correct?
 

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