Oscillation of a sequence (shown in blue) is the difference between the limit superior and limit inferior of the sequence. In mathematics, the oscillation of a function or a sequence is a number that quantifies how much a sequence or function varies between its extreme values as it approaches infinity or a point.
Herbert is a mild form of abuse meaning a silly, or dim-witted person. The origin of this term seems to be that it was derived from the name Herbert, which meant bright.. It was used in the very direct opposite, to mean dumb.
(March 2017) A sandworm is a fictional form of desert-dwelling creature from the Dune universe created by Frank Herbert. They first appear in the 1965 novel Dune, considered to be among the classics in the science fiction genre, and are iconic of the Dune series.