# Preserving

81

**Creosote**— For other uses, see Creosote (disambiguation). Creosote is the portion of chemical products obtained by the distillation of a tar that remains heavier than water, notably useful for its anti septic and preservative properties.[1] It is produced… …82

**Stereographic projection**— In geometry, the stereographic projection is a particular mapping (function) that projects a sphere onto a plane. The projection is defined on the entire sphere, except at one point mdash; the projection point. Where it is defined, the mapping is …83

**Orthogonal group**— Group theory Group theory …84

**Conformal geometry**— In mathematics, conformal geometry is the study of the set of angle preserving (conformal) transformations on a space. In two real dimensions, conformal geometry is precisely the geometry of Riemann surfaces. In more than two dimensions,… …85

**BBC Domesday Project**— 1986 Domesday Book running on its original hardware The BBC Domesday Project was a partnership between Acorn Computers Ltd, Philips, Logica and the BBC (with some funding from the European Commission s ESPRIT programme) to mark the 900th… …86

**Hurwitz's automorphisms theorem**— In mathematics, Hurwitz s automorphisms theorem bounds the group of automorphisms, via orientation preserving conformal mappings, of a compact Riemann surface of genus g > 1, telling us that the order of the group of such automorphisms is bounded …87

**Case preservation**— When a computer file system stores text, the computer may keep or discard case information. When the case is stored, it is called case preservation.A system that is not case preserving is necessarily case insensitive, but it is possible and… …88

**Kotaro Shimomura**— (1861 1937) was a Japanese chemical engineer known for many famous inventions. Early life and education When about 12 years of age, he attended the Kumamoto Yogakko where American soldier Capt. L. L. James was engaged. In 1876, he was studying… …89

**Geometric integrator**— In the mathematical field of numerical ODEs, a geometric integrator is a numerical method that preserves geometric properties of the exact flow of a differential equation.Pendulum exampleWe can motivate the study of geometric integrators by… …90

**Community land trust**— A community land trust is a nonprofit corporation which acquires and manages land on behalf of the residents of a place based community, while preserving affordability and preventing foreclosures for any housing located upon its land. Contents 1… …