CFG Sentential Form


sentential form: `math: S \Longrightarrow^* \alpha \,\,and\,\, \alpha \in (V\cup U)^*`
left-sentential form: `math: S \Longrightarrow_{lm}^* \alpha`
right-sentential form: `math: S \Longrightarrow_{rm}^* \alpha`
> L(G) element is same with sentential form which are in T*








