Services & Resources / Wolfram Forums / MathGroup Archive
-----

MathGroup Archive 2007

[Date Index] [Thread Index] [Author Index]

Search the Archive

Vectors,Norms and assumptions

  • To: mathgroup at smc.vnet.net
  • Subject: [mg82754] Vectors,Norms and assumptions
  • From: sapsi <saptarshi.guha at gmail.com>
  • Date: Tue, 30 Oct 2007 03:35:58 -0500 (EST)

Hello,
I have a question in mathematica (actually 3).

1. Let v be v={av1,av2} , then Norm[v]=Sqrt[Abs[av1]^2 + Abs[av2]^2]
Q: How do indicate to mathematica that av1 and av2 belong to reals?

2. On a similar note, i have
n={an1,an2}
a={aa1,aa2}
(*an1,an2,aa1,aa2 are all reals*)
x=Norm[y(n-a)]
>> Sqrt[Abs[(-aa1 + an1) y]^2 + Abs[(-aa2 + an2) y]^2]

Once again, how do i indicate that y ,an1,an2,aa1,aa2 are reals?

Thank you for your time and help.
Rgds
Bveo



  • Prev by Date: library.wolfram submissions
  • Next by Date: Re: Use of FrameLabel for GraphicsGrid
  • Previous by thread: Re: library.wolfram submissions
  • Next by thread: Re: Vectors,Norms and assumptions