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
Rule of Saint Francis Rule of Saint Francis As known, Saint Francis founded three orders and gave each of them a special rule. Here, only the rule of the first order is to be considered, i.e., that of the Order of Friars Minor. There are, as in so many other points in the life of St. Francis, not a small amount of doubt and controversy about the Rule of St. Francis. Whether St. Francis wrote several rules or one rule only, with several versions, whether he received it directly from heaven through revelations, or whether it was the fruit of his long experiences, whether