exercise

An **exercise** is for the reader to fill in, in private. The reader may seek help from whomever, but the idea is to practise. A great many exercises have been publicly solved, and a great many theorems have not, thus confusing which are which, though itâ€™s generally good practice to treat them *all* as exercises and ignore published proofs, within the constraints of available time and balancing of competing priorities.

When a proposition is *called* an exercise, this means at least that the omission of a proof is deliberate (or that its inclusion is accidental), but the author is confident of being able to produce one, given enough patience.

category: meta

Last revised on December 20, 2012 at 22:02:29. See the history of this page for a list of all contributions to it.