# Flat Earth And Theorema Egregium

You don't need physics to show that the earth is round. Theorema E
gregium is literally what every math undergrad learns. It says tha
t the Gaussian curvature of a surface is intrinsic.

> The theorem says that Gaussian curvature can be determined entir
> ely by measuring angles, distances and their rates on a surface,
> without reference to the particular manner in which the surface
> is embedded in the ambient 3-dimensional Euclidean space.

You can determine the Gaussian curvature of the earth without leav
ing the surface. And you know what? The value is not 0. In other w
ords, it can't be flat.


Despite of that, I think being a flat earther is a good thing thou
gh. Since ANYTHING GOES!

If we modify the theory, we could apply it to our flat SOLAR SYSTE
M and flat GALAXY. It might provide better explanations than the c
urrent theory. I just don't believe in flat EARTH.