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
Star Wars: Darth Bane: Rule of Two Star Wars: Darth Bane: Rule of Two Darth Bane: Rule of Two, the sequel to the novel "", is part of the "Star Wars" expanded universe. It was written by Drew Karpyshyn, and was released on December 26, 2007. The novel centers on the young Sith apprentice Darth Zannah, recently taken under the wing of the Sith Lord Darth Bane. The "Rule of Two" of the title refers to the rule that there be only two Sith in existence at one time: a Master and an Apprentice, a rule that Bane originates. Darth Bane, still on the planet Ruusan, finds