Structural rule A famous structural rule is known as cut. Considerable effort is spent by proof theorists in showing that cut rules are superfluous in various logics. More precisely, what is shown is that cut is only (in a sense) a tool for abbreviating proofs, and does not add to the theorems that can be proved. The successful 'removal' of cut rules, known as "cut elimination", is directly related to the philosophy of "computation as normalization" (see Curry–Howard correspondence); it often gives a good indication of the complexity of deciding a given logic. Structural rule In proof theory, a structural rule is
Japanese punctuation direct HTML equivalent is the codice_1 entity (em-space) which outputs the same fullwidth " " glyph. A fullwidth space may be used where a colon or comma would be used in English: ("Yamato Bank, Osaka Branch"). The resembles a lengthened tilde , which does not exist in JIS X 0208. Uses in Japanese include: The Japanese versions of these punctuation marks are usually full-width characters. A full-width space is usually left after such marks when writing in Japanese. The consists of two equally sized dots centered on the same vertical line. As a rule, a colon informs the reader that