Re: To be or not to be...

*To*: mathgroup at smc.vnet.net*Subject*: [mg62038] Re: [mg62002] To be or not to be...*From*: Andrzej Kozlowski <akoz at mimuw.edu.pl>*Date*: Wed, 9 Nov 2005 05:06:01 -0500 (EST)*References*: <200511090845.DAA17323@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

On 9 Nov 2005, at 17:45, Ingolf Dahl wrote: > > To Mathgroup, > > Try the following commands in order: > > b = Sequence[] > > b == Sequence[] > > b != Sequence[] > > b === Sequence[] > > b =!= Sequence[] > > The four last lines all evaluate to "True" for me. Quite amazing! > > Best regards > > Ingolf Dahl > > Sweden > > Your examples are actually equivalent to these: Equal[] True Unequal[] True SameQ[] True UnsameQ[] True This does not seem so extremly amazing to me. The fact that Equal and Unequal etc, are defined with 0 arguments is clearly due to some "internal" needs of the Mathematica programmng language and has little to do with what these relations (which are normally considered as binary relations) mean elsewhere. Andrzej Kozlowski

**References**:**To be or not to be...***From:*"Ingolf Dahl" <ingolf.dahl@telia.com>