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A process of deriving from a system of equations a new system with fewer variables, but with precisely the same solutions.



the death of nonadapted individuals in the course of the struggle for life. Elimination may be nonselective (general) or selective.

Nonselective elimination occurs as a result of environmental factors that exceed the adaptive capabilities of a given group of individuals (that is, a particular population or species). Among such factors, the most common are natural disasters and the catastrophic effects of human intervention, such as floods, droughts, and changes in the landscape (for example, as a result of urbanization). Large-scale elimination may lead to the extinction of an entire species.

Selective elimination, or the death of part of a population, is caused by some individuals’ lower relative capacity for adaptation (as in the case of the spontaneous thinning out of a forest). Selective elimination is a major factor in evolution, since differential rates of survival result in the multiplication of the better-adapted individuals—that is, natural selection.


Shmal’gauzen, I. I. Problemy darvinizma, 2nd ed. Leningrad, 1969.
References in periodicals archive ?
Coughlin lost his second round match-up to Vincent Nobile, while Gaines lost traction against eventual title winner Jonathon Gray who defeated current points leader Jason Line in the final elimination showdown for the rescheduled event.
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On 20 December 1993 the General Assembly, by resolution 48/104, adopted the Declaration on the Elimination of Violence against Women.
At present, malaria incidence in all malaria-endemic districts, with the exception of Vhembe District in Limpopo, meet the elimination-stage threshold of the WHO elimination continuum (Table 1).
Dr Tatem comments, "Evidence from the data we have examined suggests that a concerted effort to bring an individual country to the point of elimination will likely result in that country maintaining a stable, low malaria transmission rate.
OBJECTIVES: We estimated apparent elimination rates using a simple first-order one-compartment model for selected dioxin congeners based on repeated blood sampling in a previously studied population.
Although in common usage the terms eradication and elimination can be synonymous, in the field of public health, they are not (3).
The point of contact for each retailer has direct access to Ecolab's professionals who specialize in food safety sanitation, pest elimination and floor care challenges.
By acquiring a leading commercial pest elimination business in the UK, we have started the process of bringing our proven pest elimination programs to our customers in Europe and capitalizing on that lucrative market with a strong franchise.
It is important to try to elicit the client's ranking of the aspects' importance from the client before the elimination begins: Without such a ranking, the search may stop before the most important aspects have been considered.
Committee on the Elimination of Discrimination Against Women called on Andorra, a country located between France and Spain and about 2.
has launched a long-term-care insurance product that offers reimbursement for in-home health care from day one, without an elimination period.