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Approximate Zero Times A Symbol

  • To: mathgroup at
  • Subject: [mg127060] Approximate Zero Times A Symbol
  • From: "djmpark" <djmpark at>
  • Date: Wed, 27 Jun 2012 04:11:51 -0400 (EDT)
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What is the justification for the following?


0. x + 1. y 


0. + 1. y


I want to display a dynamic weighted sum of x and y and sometimes one of the
coefficients becomes zero. I would like to keep both terms (for a steady
display) and format with NumberForm.  If Mathematica is going to drop the x,
why doesn't it at least also drop the approximate zero?


If I use SetPrecision we obtain:


SetPrecision[0. x + 1. y, 10] 


1.000000000 y 


which is at least more consistent, but not what I want either.


David Park

djmpark at 

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