normalelor

Normalelor is a Romanian term you may encounter in mathematical and geometric texts. It is formed as the genitive/dative plural of the noun or adjective normal, and is commonly used when referring to multiple normal lines or vectors. In practice, phrases such as direcțiile normalelor or normalele unei suprafețe appear in explanations of geometry, indicating the normals to a curve or surface at given points.

In geometry, a normal at a point on a curve or surface is a line or vector perpendicular to the tangent at that point. Normals play a central role in differential geometry, computer graphics, physics, and engineering. They are used to describe orientation, compute reflections and shading in rendering, assess curvature, and determine perpendicular directions for various constructions. When speaking of several such directions, the term normalelor is used to denote the collection of normals associated with multiple points or features.

In Romanian mathematical writing, normalelor can also appear in the context of a normal field—a mapping that assigns a normal vector to each point of a surface. The concept connects to related ideas such as normal vectors, normal lines, and orthogonality, and it is often contrasted with tangent directions to understand the local geometry of curves and surfaces.

See also: normal vector, normal line, orthogonality, tangent line, differential geometry.