Re: Multiple choice question

*To*: mathgroup at smc.vnet.net*Subject*: [mg26983] Re: Multiple choice question*From*: "A. Ciarkowski" <aciark at ippt.gov.pl>*Date*: Tue, 30 Jan 2001 23:22:09 -0500 (EST)*Sender*: owner-wri-mathgroup at wolfram.com

I have just learnt from prof. J. Boersma how to properly perform analytic continuation of an integral understood in the sense of its principal value onto a complex plane with a cut. In view of his 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