pencil of planes
Смотреть что такое "pencil of planes" в других словарях:
pencil — penciler; esp. Brit., penciller, n. pencillike, adj. /pen seuhl/, n., v., penciled, penciling or (esp. Brit.) pencilled, pencilling. n. 1. a slender tube of wood, metal, plastic, etc., containing a core or strip of graphite, a solid coloring… … Universalium
Pencil (mathematics) — A pencil is a family of geometric objects, such as lines, that have a common property, such as passage through a given line in a given plane.In more technical language, a pencil is the special case of a linear system of divisors in which the… … Wikipedia
pencil — [pen′səl] n. [ME pencel < MFr pincel < VL * penicellus < L penicillus, a brush < dim. of penis, a tail, PENIS: mod. sense & form infl. by PEN2] 1. Archaic an artist s small, fine brush 2. the individual style or ability of an artist 3 … English World dictionary
Pencil sharpener — A pencil sharpener (also referred to as pencil parer) is a device for sharpening a pencil s point by shaving one end. Pencil sharpeners exist in both electric and hand powered forms.HistoryPencils were in use before the development of devices… … Wikipedia
axial pencil — noun : a system of planes intersecting on a straight line … Useful english dictionary
Plucker matrix — Plucker matrices are a representation of a line used in relation to 3D homogeneous coordinates. Specifically, a Plucker matrix is a 4 times;4 skew symmetric homogeneous matrix, defined as mathbf{P} = AB^T BA^T, where A and B are two homogeneous… … Wikipedia
drawing — /draw ing/, n. 1. the act of a person or thing that draws. 2. a graphic representation by lines of an object or idea, as with a pencil; a delineation of form without reference to color. 3. a sketch, plan, or design, esp. one made with pen, pencil … Universalium
Optical aberration — v · d · e Optical aberration … Wikipedia
Lie sphere geometry — is a geometrical theory of planar or spatial geometry in which the fundamental concept is the circle or sphere. It was introduced by Sophus Lie in the nineteenth century. [The definitive modern textbook on Lie sphere geometry is Harvnb|Cecil|1992 … Wikipedia
Graphene — is a one atom thick planar sheet of sp2 bonded carbon atoms that are densely packed in a honeycomb crystal lattice. It can be viewed as an atomic scale chicken wire made of carbon atoms and their bonds. The name comes from GRAPHITE + ENE;… … Wikipedia
space perception — Introduction process through which humans and other organisms become aware of the relative positions of their own bodies and objects around them. Space perception provides cues, such as depth and distance, that are important for movement… … Universalium
