A language is said to be prefix closed if all of its prefixes are present in every string. If every string's prefix is present in the language, then we may say that the language is prefix-closed.
Let C be an infinite, prefix-closed, context-free language. Show that C contains an infinite.
There are a countably infinite number of context-free languages. This true because every description of a context-free language is of finite length, so there are a countably infinite number of such descriptions.
The intersection of two context-free languages is not necessarily context-free and that the complement of a context-free language is not necessarily context-free.
Learn more about prefix https://brainly.com/question/14161952
#SPJ4
