Re: Tough Limit

*To*: mathgroup at smc.vnet.net*Subject*: [mg92674] Re: Tough Limit*From*: Peter Pein <petsie at dordos.net>*Date*: Fri, 10 Oct 2008 04:34:18 -0400 (EDT)*References*: <gckmsj$nh8$1@smc.vnet.net>

Well, I guessed I missed sth. Additionally, you have to assume a real omega: Integrate[Sin[\[Omega]*t]*Exp[(-t)*s], {t, 0, Infinity}, Assumptions -> Inequality[s, Greater, 0, Equal, Im[\[Omega]]]] or - because you'll get s^2+omega^2 in the denominator: Integrate[Sin[\[Omega]*t]/E^(t*s), {t, 0, Infinity}, Assumptions -> s > Abs[Im[\[Omega]]]] Peter