Theorema Egregium, or the 'Remarkable Theorem,' is a fundamental result in differential geometry that states that the Gaussian curvature of a surface is an intrinsic invariant. This means that Gaussian curvature can be determined entirely from measurements made on the surface itself, without reference to how the surface is embedded in three-dimensional space. This property connects closely to the understanding of surfaces and their curvatures, especially in the context of how shapes bend and stretch.
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