<math>\mathbf{P} = \{ L : L=L(M) \text{ for some deterministic polynomial-time Turing machine } M \}</math> 其中 <math>L(M) = \{ w\in\Sigma^{*}: M \text{ accepts } w \}</math> | <math>\mathbf{P} = \{ L : L=L(M) \text{ for some deterministic polynomial-time Turing machine } M \}</math> 其中 <math>L(M) = \{ w\in\Sigma^{*}: M \text{ accepts } w \}</math> |