Re: Multiple choice question
- To: mathgroup at smc.vnet.net
- Subject: [mg26952] Re: Multiple choice question
- From: "A. Ciarkowski" <aciark at ippt.gov.pl>
- Date: Sat, 27 Jan 2001 20:00:16 -0500 (EST)
- Organization: http://news.icm.edu.pl/
- References: <943dj3$cjh@smc.vnet.net> <wq8a6.3201$nn4.99854@ralph.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Prof. J. Boersma from Eindhoven University of
Technology has just sent me his remarks on proper
analytic continuation of the Ei(x) function onto the
complex z (= x + I y) plane. In view of these remarks,
I must correct myself: the integral
Integrate[ Exp[ I t 2 ]/(t - 1 - I), {t, 0, Infinity}]
equals
Exp[2 I - 2] ( Pi I - ExpIntegralEi[ 2 - 2 I] ),
and hence the first result, Out[12], is correct.
Adam