Differential Geometry general question

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SUMMARY

The discussion centers on the relationship between the coefficients of the First Fundamental Form (FFF) and the isometry of surfaces in differential geometry. It is established that if two surfaces parameterized by X and Y have identical coefficients of the FFF, then the map X(Y^-1) is an isometry, confirming the surfaces are isometric. However, differing coefficients do not necessarily indicate non-isometry, particularly when both surfaces share the same Gaussian curvature. The user seeks to demonstrate that two surfaces with different FFF coefficients but identical Gaussian curvature are not isometric, effectively disproving the converse of Gauss's Great Theorem.

PREREQUISITES
  • Understanding of Differential Geometry concepts
  • Familiarity with the First Fundamental Form (FFF)
  • Knowledge of Gaussian curvature
  • Experience with isometric mappings and their properties
NEXT STEPS
  • Study the implications of Gauss's Great Theorem in detail
  • Explore examples of surfaces with different FFF coefficients
  • Investigate the relationship between Gaussian curvature and isometry
  • Learn about the conditions under which surfaces can be considered isometric
USEFUL FOR

Students and researchers in mathematics, particularly those specializing in differential geometry, as well as educators seeking to deepen their understanding of surface properties and isometry.

InbredDummy
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Ok, in general, I know that if the coefficients of the First Fundamental Form agree for two surfaces parameterized by X and Y, the the map X(Y^-1) is an isometry, or the two surfaces are isometric.

I also know that if two parameterizations don't have the same coefficients, this does not imply that the two surfaces are not isometric.

So i have two parameterizationsthat have different coefficients of the FFF (first fundamental form) but have the same Gaussian curvature. I need to prove that the two surfaces are not isometric. (ie i need to prove that the converse of Gauss's Great Theorem is false).
 
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