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.
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.
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.
It was the first species to be listed after the moratorium ended.
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.
Or, suggest Karban and his co-workers, the first species attacking the plant "may deplete the most desirable nutrients or plant parts.