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dotproduct in integration

Posted on 2008-08-27 09:18 By supersquid (3)
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Hi,

I have the following (simplified here) formula:

G = ∫∫ g dp (n * dr)

The last part "(n*dr) is actually a dotproduct. How do I put this in Maple? Usually you use something like "G:=Int(Int(g dp (n), p=0..1), r=0..1) but than I don't have a dotproduct between "n" and "dr".

Tim

 

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edgar's picture

As-is?

Comment on 2008-08-27 14:24 from edgar (Maple Rating 2 176)

Probably you would not use that formula as-is. But if you want to ...
n has components, say (n_x,n_y,n_z) and r has components, say (r_x, r_y, r_z),
so do the dot product of these vectors. n dot dr becomes
n_x*dr_x + n_y*dr_y + nz*dr_z
---
G A Edgar

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