Spherical
41spherical triangle — n. a closed figure on the surface of a sphere bounded by the arcs of three great circles: the sum of the angles exceeds 180° …
42Spherical harmonics — In mathematics, the spherical harmonics are the angular portion of an orthogonal set of solutions to Laplace s equation represented in a system of spherical coordinates. Spherical harmonics are important in many theoretical and practical… …
43Spherical Earth — Medieval artistic representation of a spherical Earth with compartments representing earth, air, and water (c. 1400). The concept of a spherical Earth dates back to ancient Greek philosophy from around the 6th century BC …
44Spherical coordinate system — In mathematics, the spherical coordinate system is a coordinate system for representing geometric figures in three dimensions using three coordinates: the radial distance of a point from a fixed origin, the zenith angle from the positive z axis… …
45Spherical aberration — shape of lenses and mirrors. This is an important effect, as spherical shapes are much easier to produce than aspherical and so most lenses have spherical shapes. Positive spherical aberration means peripheral rays are bent too much. Negative… …
46Spherical design — A spherical design, part of combinatorial design theory in mathematics, is a finite set of points on the d dimensional unit hypersphere Sd such that the average value of any polynomial f of degree t or less on the set equals the average value of… …
47Spherical polyhedron — In mathematics, the surface of a sphere may be divided by line segments into bounded regions, to form a spherical tiling or spherical polyhedron. Much of the theory of symmetrical polyhedra is most conveniently derived in this way.Spherical… …
48Spherical bearing — A spherical bearing is a bearing that permits angular rotation about a central point in two orthogonal directions within a specified angular limit based on the bearing geometry. Typically these bearings support a rotating shaft in the [bore] of… …
49Spherical 3-manifold — In mathematics, a spherical 3 manifold M is a 3 manifold of the form M = S3 / Γ where Γ is a finite subgroup of SO(4) acting freely by rotations on the 3 sphere S3. All such manifolds are prime, orientable, and closed. Spherical 3 manifolds are… …
50Spherical cap — In geometry, a spherical cap is a portion of a sphere cut off by a plane. If the plane passes through the center of the sphere, so that the height of the cap is equal to the radius of the sphere, the spherical cap is called a hemisphere .If the… …
