In sunshine as vivid as revelation, Linden Avery knelt on the stone of a low-walled coign like a balcony high in the outward face of Revelstone's watchtower.

Although still young at heart and head, he looks more and more like his old friend Archimedes, increasingly bearded and increasingly grey, with an otherworldly mien – a look that should earn him a spot in the online quiz featuring portraits of frumpy old men under the rubric “Prof or Hobo?”

A Galois field extension may be defined in terms of its Galois group (Section 2) or in terms of the internal structure of the extension (Section 3).

The major difference between desmodioid and aeschynomenoid nodules is that the former contains a mixture of infected and uninfected cells whereas in the latter only infected cells are present.