- #1
evinda
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MHB
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Hello! ![Cool :cool: :cool:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
I have to use the closure properties and languages that are known to be contextfree,to show that the language $\{w\in\{a,b\}^{*}:a^{r}b^{k},r\neq k \}$ is contextfree.
But...which languages are known to be contextfree?
Or aren't there languages that are known to be contextfree and it is meant,that I can use no matter which languages I want and I just have to show that they are contextfree?![Confused :confused: :confused:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
I have to use the closure properties and languages that are known to be contextfree,to show that the language $\{w\in\{a,b\}^{*}:a^{r}b^{k},r\neq k \}$ is contextfree.
But...which languages are known to be contextfree?
Or aren't there languages that are known to be contextfree and it is meant,that I can use no matter which languages I want and I just have to show that they are contextfree?