Theorema Egregium, which means 'remarkable theorem' in Latin, is a key result in differential geometry established by Carl Friedrich Gauss. It asserts that the Gaussian curvature of a surface is an intrinsic property, meaning it can be determined using only measurements made on the surface itself, without reference to how the surface is embedded in three-dimensional space. This theorem highlights the relationship between curvature and geometric properties, showing that Gaussian curvature remains invariant under local deformations of the surface.
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