In geometry, a simplex is a generalization of the notion of a triangle or tetrahedron to arbitrary dimensions. Specifically, a k-simplex is a k-dimensional polytope which is the convex hull of its k + 1 vertices. More formally, suppose the k + 1 points are affinely independent, which means are linearly independent. Then, the simplex determined by them is the set of points
In geometry, a hypercube is an n-dimensional analogue of a square and a cube. It is a closed, compact, convex figure whose 1-skeleton consists of groups of opposite parallel line segments aligned in each of the space's dimensions, perpendicular to each other and of the same length. A unit hypercube's longest diagonal in n dimensions is equal to .
Linear programming is a method to achieve the best outcome in a mathematical model whose requirements are represented by linear relationships. Linear programming is a special case of mathematical programming.
In mathematical optimization, Dantzig's simplex algorithm is a popular algorithm for linear programming.
The desert sparrow is a species of bird in the sparrow family Passeridae, found in the Sahara Desert of northern Africa. A similar bird, Zarudny's sparrow, is found in Central Asia and was historically recognised as a subspecies of the desert sparrow, but varies in a number of ways and is now recognised as a separate species by BirdLife International, the IOC World Bird List, and the Handbook of the Birds of the World Alive.
Herpes simplex virus1 and 2, also known by their taxonomical names Human alphaherpesvirus 1 and Human alphaherpesvirus 2, are two members of the human Herpesviridae family, a set of viruses that produce viral infections in the majority of humans. Both HSV-1 and HSV-2 are common and contagious. They can be spread when an infected person begins shedding the virus. About 67% of the world population under the age of 50 has HSV-1. In the United States more than one in six people have HSV-2. Although it can be transmitted through any intimate contact, it is one of the most common sexually transmitted infections.
Pseudoryzomys simplex, also known as the Brazilian false rice rat or false oryzomys, is a species of rodent in the family Cricetidae from south-central South America. It is found in lowland palm savanna and thorn scrub habitats. It is a medium-sized species, weighing about 50 grams (1.8 oz), with gray–brown fur, long and narrow hindfeet, and a tail that is about as long as the head and body. The IUCN has assessed its conservation status as being of least concern, although almost nothing is known about its diet or reproduction.
The blue-collared parrot also known as simple parrot, lilac-collared song parrot, or lilac-collared Geoffroy's parrot, is a parrot found in the higher elevations of New Guinea. It is found from 500 to 2300 m, mainly between 800 and 1900 m. It is 23–25 cm, mainly green with a black beak, yellow wing bend, blue underwing coverts, and a pale yellow iris. Adult males have a blue collar across upper breast to lower neck above the mantle, adult females have some blue on the rear crown. Juveniles have no blue and a paler bill. There are two subspecies:
Hyla simplex is a species of frog in the family Hylidae found in southern Australia, Vietnam, and Laos. Frogs from Hainan Island can be treated as subspecies Hyla simplex hainanensis.
The cream-vented bulbul is a member of the bulbul family of passerine birds. It is found in south-eastern Asia from the Malay Peninsula to Borneo. Its natural habitat is subtropical or tropical moist lowland forests.
The grey whistler, or brown whistler, is a species of bird in the family Pachycephalidae. It is found in northern Australia and New Guinea. Its natural habitats are subtropical or tropical moist lowland forest and subtropical or tropical mangrove forest.
Ponerorchis simplex is a species of plant in the family Orchidaceae. It is endemic to China, found only in Sichuan and Yunnan. Its flowers are yellow, sometimes with brown spots.
Herpes simplex is a viral infection caused by the herpes simplex virus. Infections are categorized based on the part of the body infected. Oral herpes involves the face or mouth. It may result in small blisters in groups often called cold sores or fever blisters or may just cause a sore throat. Genital herpes, often simply known as herpes, may have minimal symptoms or form blisters that break open and result in small ulcers. These typically heal over two to four weeks. Tingling or shooting pains may occur before the blisters appear. Herpes cycles between periods of active disease followed by periods without symptoms. The first episode is often more severe and may be associated with fever, muscle pains, swollen lymph nodes and headaches. Over time, episodes of active disease decrease in frequency and severity. Other disorders caused by herpes simplex include: herpetic whitlow when it involves the fingers, herpes of the eye, herpes infection of the brain, and neonatal herpes when it affects a newborn, among others.
Pellaea glabella is the smooth cliffbrake. For much of pteridological history, it was regarded as a reduced form or variety of Pellaea atropurpurea. P. glabella is known to exist in two cryptic species, one diploid and one tetraploid. The diploid reproduces sexually, while the tetraploid is normally apogamous. It is now known that the tetraploid form of the species is one of the parents of the original hybrid P. Xatropurpurea that became the apogamous species.
Conus algoensis, common name the algoa cone, is a species of sea snail, a marine gastropod mollusk in the family Conidae, the cone snails and their allies.
Anomia simplex, the common jingle shell, is a typical species of bivalve mollusc in the family of Anomiidae, sharing attributes to blue mussels, American oysters, and bay scallops. Species related to the family of Anomiidae are often noted for their extremely thin, often translucent, paper-like shells. Anomia simplexcan be found in shallow waters, typically estuaries, mainly along the Atlantic Coast of North America; however, they can range from as far north as the coast of Nova Scotia, and as far south as the coast of Brazil.
Acremodontina simplex is a species of sea snail, a marine gastropod mollusk in the family Ataphridae, the false top snails.
Loudetia simplex is a grass species found in tropical and Southern Africa and Madagascar. It was originally described as a Tristachya species by Christian Gottfried Daniel Nees von Esenbeck in 1841 and was transferred to Loudetia by Charles Edward Hubbard in 1934.
Lithophaga simplex is a species of bivalve mollusc in the family Mytilidae. It is a boring species, tunnelling into living coral colonies. It can be found in the tropical western central Pacific Ocean.
Human alphaherpesvirus 1 (HHV-1) is a species of virus in the genus Simplexvirus, subfamily Alphaherpesvirinae, family Herpesviridae, and order Herpesvirales.
