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
Golden Rule Airlines 3 An-2s (as of 2006-12-12): one each of the passenger, cargo and agricultural versions. Golden Rule Airlines Golden Rule Airlines was an airline based in Bishkek, Kyrgyzstan. The airline is on the List of air carriers banned in the European Union. One of their aircraft was damaged beyond repair after it crashed in 2009. The airline ceased operations in 2011. Services operated by Golden Rule Airlines include the following (as of 2006-12-12): Charter services (passenger or cargo) based in Bishkek. The company has a service department, and is the only licensed company in Kyrgyzstan for An-2's. This includes flight training