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Re:ØMQ - The Guide by dublinben on Sunday May 31, 2015 @11:48PM (#9636717)
Not least when the empty set symbol (∅) exists, and would be more appropriate. This is almost as bad as the metal umlaut.[0]

[0] https://en.wikipedia.org/wiki/Metal_umlaut

Re:ØMQ - The Guide by provemewrong on Monday June 01, 2015 @03:08AM (#9637101)
Honestly, it would be equally inapropriate. In both cases you're hijacking symbols that look like other symbols but mean completely different things.