The republic of letters is at present divided into three classes. One writer, for instance, excels at a plan or a title-page, another works away the body of the book, and a third is a dab at an index.
— OLIVER GOLDSMITH, in The Bee (1759)
When an index entry refers to a page containing a relevant exercise, see also the answer to that exercise for further information. An answer page is not indexed here unless it refers to a topic not included in the statement of the exercise.
2-colorability of hypergraphs, 185.