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In marketing, product bundling is offering several products or services for sale as one combined product or service package. It is a common feature in many imperfectly competitive product and service markets. [1] Industries engaged in the practice include telecommunications services, financial services, health care, information, and consumer ...
Formal definition. A fiber bundle is a structure where and are topological spaces and is a continuous surjection satisfying a local triviality condition outlined below. The space is called the base space of the bundle, the total space, and the fiber. The map is called the projection map (or bundle projection ).
t. e. C4 carbon fixation or the Hatch–Slack pathway is one of three known photosynthetic processes of carbon fixation in plants. It owes the names to the 1960s discovery by Marshall Davidson Hatch and Charles Roger Slack. [1] C 4 fixation is an addition to the ancestral and more common C 3 carbon fixation. The main carboxylating enzyme in C 3 ...
This process of the second bacterial cell taking up new genetic material is called transformation. In molecular biology and genetics, transformation is the genetic alteration of a cell resulting from the direct uptake and incorporation of exogenous genetic material from its surroundings through the cell membrane (s).
A mapping : between total spaces of two fibrations : and : with the same base space is a fibration homomorphism if the following diagram commutes: . The mapping is a fiber homotopy equivalence if in addition a fibration homomorphism : exists, such that the mappings and are homotopic, by fibration homomorphisms, to the identities and . [2]: 405-406
A pteridophyte is a vascular plant (with xylem and phloem) that reproduces by means of spores. Because pteridophytes produce neither flowers nor seeds, they are sometimes referred to as "cryptogams", meaning that their means of reproduction is hidden. Ferns, horsetails (often treated as ferns), and lycophytes ( clubmosses, spikemosses, and ...
The tensor product bundle E ⊗ F is defined in a similar way, using fiberwise tensor product of vector spaces. The Hom-bundle Hom(E, F) is a vector bundle whose fiber at x is the space of linear maps from E x to F x (which is often denoted Hom(E x, F x) or L(E x, F x)). The Hom-bundle is so-called (and useful) because there is a bijection ...
This glossary of biology terms is a list of definitions of fundamental terms and concepts used in biology, the study of life and of living organisms.It is intended as introductory material for novices; for more specific and technical definitions from sub-disciplines and related fields, see Glossary of cell biology, Glossary of genetics, Glossary of evolutionary biology, Glossary of ecology ...