Verified answer

Yes, it can be, but not always. '*' is frequently use to represent a string of characters of any length including an empty string, so Ø* can be Ø if '*' is an empty string.

In Windows, DIR FRED.* lists all the files that start with FRED. no matter what extension the file name has, including no extension.

Of course in many computer languages Ø*=Ø will actually result in the answer Ø^2.

no because Ø* contains epsilon, and Ø does not.

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