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Topic: Is there way to use something like Assuming with the function SIgn?
Replies: 1   Last Post: Nov 24, 2012 2:27 AM

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Eduardo Mendes

Posts: 6
Registered: 11/4/12
Is there way to use something like Assuming with the function SIgn?
Posted: Nov 23, 2012 3:35 AM
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Hello

I was wondering there is something similar to what can be done with Integrate, Reduce and Limit. Something like

list={1,-2,a,3}

Assuming[a<0,Sign[list]]

Mathematica returns {1,-1,Sign[a],1} and I would like to see something like {1,-1,-1,1}. Can that be done?

Many thanks

Ed





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