In mathematics, the term adjoint applies in several situations. Several of these share a similar formalism: if A is adjoint to B, then there is typically some formula of the type

1. The adjoint of a matrix is crucial in calculating its inverse.
   矩陣的伴隨矩陣在計算其逆矩陣中至關重要。
2. In quantum mechanics, the adjoint operator plays a fundamental role.
   在量子力學中，伴隨算子起著基本作用。