Re: Dot Product in Cylindrical Coordinates

*To*: mathgroup at smc.vnet.net*Subject*: [mg69327] Re: Dot Product in Cylindrical Coordinates*From*: Paul Abbott <paul at physics.uwa.edu.au>*Date*: Thu, 7 Sep 2006 04:30:18 -0400 (EDT)*Organization*: The University of Western Australia*References*: <edm0rl$cj0$1@smc.vnet.net>

In article <edm0rl$cj0$1 at smc.vnet.net>, "David Park" <djmp at earthlink.net> wrote: > I still want to keep this alive. Perhaps the terminology is ambiguous? Answer this, when Sergio says the vector {1,Pi/4,0} is in Cylindrical Coordinates what, exactly, do you think he means? Again, I highlight the Pi/4 in the second position. Also, I am not defending the VectorAnalysis package. Indeed, I prefer to use the Symbolic Vector Analysis package developed by Hong Qin, available at http://www.physics.uwa.edu.au/pub/Mathematica/Calculus/ After loading this package, (naively) declaring the two vectors as A = DefineVector[1, 1, Pi/4, 0]; B = DefineVector[1, 2, 0, 1]; then DotProduct[A, B] 2 All of the issues that you raise are resolved by using Qin's package. Cheers, Paul _______________________________________________________________________ Paul Abbott Phone: 61 8 6488 2734 School of Physics, M013 Fax: +61 8 6488 1014 The University of Western Australia (CRICOS Provider No 00126G) AUSTRALIA http://physics.uwa.edu.au/~paul