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context-free_grammars [2011/10/24 09:28] vkuncak |
context-free_grammars [2011/10/24 09:28] vkuncak |
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| $u \Rightarrow^{+} v$ means $v$ is obtained from $u$ by one or more $\Rightarrow$ steps | $u \Rightarrow^{+} v$ means $v$ is obtained from $u$ by one or more $\Rightarrow$ steps | ||
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| $u \Rightarrow^{*} v$ means $v$ is obtained from $u$ by zero or more $\Rightarrow$ steps | $u \Rightarrow^{*} v$ means $v$ is obtained from $u$ by zero or more $\Rightarrow$ steps | ||