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MathGroup Archive 1998

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Union[{0},{0.}] = {0,0.}?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg12662] Union[{0},{0.}] = {0,0.}?
  • From: "Chris Farr" <farr at brown.edu>
  • Date: Mon, 1 Jun 1998 23:16:38 -0400
  • Sender: owner-wri-mathgroup at wolfram.com

Union[{0},{0.}] = {0,0.}.

Why?

I would like the above to return only {0}.

The root of the problem is that Mathematica thinks they are the same:

SameQ[{0},{0.}] = False

How can I get around this?  The following doesn't help either.

Union[{ N[0] },{0.}] = {0,0.}

Any ides out there?



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