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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)
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"Roger Stafford" <ellieandrogerxyzzy@mindspring.com.invalid> wrote in message <ho81p7$1nv$1@fred.mathworks.com>...

>   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.

Bruno