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MathGroup Archive 2006

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Dot Product in Cylindrical Coordinates

  • To: mathgroup at smc.vnet.net
  • Subject: [mg69364] Dot Product in Cylindrical Coordinates
  • From: Sergio Miguel Terrazas Porras <sterraza at uacj.mx>
  • Date: Sat, 9 Sep 2006 03:26:41 -0400 (EDT)

Thanks to all who replied, especially to David Park, Andrzej Koslowski and
Jean-Mark Gulliet.
As Jean-Mark pointed out, it works correctly in version 5.2!
Yes, I had loaded the Vector Analysis package, set coordinates to
cylindrical, and the components of the vectors were the cylindrical
coordinates.
 
In version 5.1,
DotProduct[{1,Pi/4,0},{2,0,1}]
Out: Sqrt[2]
 
In version 5.2,
DotProduct[{1,Pi/4,0},{2,0,1}]
Out: 2
 
It seems Wolfram made some changes in this respect.
Thanks again
Sergio Terrazas


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