Kai-Martin wrote:
In grace the Fresnel integrals "fresnlc(x)" and "fresnls(x)" approach 0.5
rather than sqrt(pi/8)=0.626 given by math textbooks.
See e.g. <http://en.wikipedia.org/wiki/Fresnel_integral>. If you look
into the Cephes lib sources (used by Grace), the integrals are defined as
*
* x
* -
* | |
* C(x) = | cos(pi/2 t**2) dt,
* | |
* -
* 0
*
* x
* -
* | |
* S(x) = | sin(pi/2 t**2) dt.
* | |
* -
* 0
Regards,
Evgeny
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