Aiki (martial arts principle) Aiki (martial arts principle) Aiki from a Japanese budo term, at its most basic is a principle that allows a conditioned practitioner to negate or redirect an opponent's power. When applied, the aiki practitioner controls the actions of the attacker with minimal effort and with a distinct absence of muscular tension usually associated with physical effort. In Japanese "Aiki" is formed from two kanji: The kanji for "ai" is made of three radicals, "join", "one" and "mouth". Hence, "ai" symbolizes things coming together, merging. Aiki should not be confused with "wa" which refers to harmony. The kanji for "ki" represents
Orthogonality (term rewriting) Orthogonality (term rewriting) Orthogonality as a property of term rewriting systems describes where the reduction rules of the system are all left-linear, that is each variable occurs only once on the left hand side of each reduction rule, and there is no overlap between them. Orthogonal term rewriting systems have the consequent property that all reducible expressions (redexes) within a term are completely disjoint -- that is, the redexes share no common function symbol. For example, the term rewriting system with reduction rules is orthogonal -- it is easy to observe that each reduction rule is left-linear, and the left