Suuntanormaali
Suuntanormaali, also known as directional normality, is a concept in mathematics, specifically in the study of differential geometry and the theory of surfaces. It refers to the property of a surface where the principal directions of curvature at each point are orthogonal to the lines of curvature. In other words, the surface's lines of curvature are the principal directions of curvature, and they intersect at right angles.
This property is significant because it simplifies the study of the surface's curvature and shape. For instance,
Suuntanormaali surfaces are not common in nature, but they do occur in certain mathematical constructions, such