double descent

double descent

or

bilineal descent

a system of DESCENT in which there are ‘Patriclans’ and ‘Matriclans’ within the same group. They may each be used for different reasons, for example, inheritance of land may be through the male and inheritance of names through the female. A consequence of this is that an individual is a member of both a PATRILINEAL and a MATRILINEAL DESCENT group.
References in periodicals archive ?
Precise Flight SpeedBrakes and PowerPac Spoilers can more than double descent rates without power chops or Vne busts.
Our results show that ancestral sociocultural conditions and bilateral and double descent systems were more common in transgendered than in non-transgendered societies.
a double descent if [sigma](i - 1) > [sigma](i) > [sigma](i + 1).
1,0)], or (1,0), when i is respectively a peak, a valley, a double rise, or a double descent in [sigma].
Note that depending on i being a peak, a valley, a double rise, or a double descent in [sigma], the node i in T([sigma]) has respectively zero labelled child, two labelled children, one labelled child to the left or to the right (see the example Figure 3).
1, and 4 is a double rise in w and a double descent in w', whereas 4 is always a valley in the elements of [sigma] [bar.
Let k be the smallest integer such that k is a double rise of [tau], and a double descent of [sigma] (since the inclusion of double rises set is strict, such a k exists).
These objects encode in a natural way some statistics on permutations: peaks, valleys, double rises, and double descents.
The double descent led to both planes flying at the same altitude and hitting each other.
While Beatty offers a critique of some aspects of alliance theory through his discussion of the specific features of affiance in central Nias, his conclusion that the Nias system occupies a transitional position between asymmetric prescriptive alliance, on the one hand, and double descent, on the other, is nothing more than a replication of Van Wouden's evolutionary model for explaining the multiple forms of marriage in Indonesia.