👉 In mathematics, a daggering or an adjunction is a binary operation that takes two mathematical expressions and produces a third expression. In other words, it is a "dagger" in the sense of a double operator. A daggered expression can be thought of as a new expression obtained by applying the original expression to itself. For example, consider two expressions \(a\) and \(b\). The daggered expression would be denoted as \(a \circ b\), which is simply the