first species

first species

[′fərst ′spē‚shēz]
(mathematics)
The class of sets G0 such that one of the sets Gn is the null set, where, in general, Gn is the derived set of Gn-1.
References in periodicals archive ?
In tanks that did not include the first species of wasp, the second went extinct within a few generations.
The 1799 purchase of 350 acres of live oak in the Carolinas and Georgia constituted the nation's first publicly owned forestland and made live oak the first species in North America to be actively preserved.
The peregrine falcon, one of the first species to receive protection under the Endangered Species Act, reached record population levels in the Northeast in 2001, according to a report by NWF and the state of Vermont.
shumwayae, this new microbe is genetically and structurally different from the first species, P.
The second type of CIO, operating at the same level as the first species, is the chief technology officer or chief infrastructure officer.
An excavation in central Asia has unearthed a pair of 1.7-million-year-old fossil skulls, providing a glimpse of what may have been the first species of human ancestors to journey out of Africa.
They were the first species to live in the famous rock dens at the zoo which is raising funds to create a bigger home for its large cat family.
Pearman warns that protecting corridors of forest that connect fragments, often proposed as a remedy for butchered habitat, would not help the first species, but might benefit the second.