Limit[ Sign,x->Infinity ]
- To: mathgroup at smc.vnet.net
- Subject: [mg27289] Limit[ Sign,x->Infinity ]
- From: Jack Goldberg <jackgold at math.lsa.umich.edu>
- Date: Fri, 16 Feb 2001 03:58:51 -0500 (EST)
- Sender: owner-wri-mathgroup at wolfram.com
I give you two examples using ver. 4.0 on a Mac and a unix system.
Limit[ Sign[x]*Sign[z],x->Infinity ]
yields Sign[z] which is good.
yields an expression too ugly to present to a wide audience, which is bad.
Its not a bug since
yields 1+Sign[z] which is good.
I propose the name "buglet" to describe such "features" :-). By the way,
I tried some obvious variations on combinations of Sign[z] and Sign[x] and
found it pretty hard to predict the output.
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