From: "Bruno Luong" <b.luong@fogale.findmycountry>
Newsgroups: comp.soft-sys.matlab
Subject: Re: Area integral over a triangle in MATLAB -- is numerical integration possible?
Date: Mon, 22 Mar 2010 15:31:04 +0000 (UTC)
Organization: FOGALE nanotech
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"Roger Stafford" <> wrote in message <ho81p7$1nv$>...

>   One thing I forgot to ask you, Vivek.  Are your values of k_0 and the ranges of x in the triangle such that an excessive number of cycles occur in the trigonometric function, exp(-i*k_0*x)? 

Roger, I can answer this question. Usually not: when the FEM is correctly setup then the mesh size must be small compare to wave number, thus exp(-i*k_0*x) would not have many cycles on the triangle element. If it's not the case then there is no use to solve FEM because the discretized solution will have huge error.