| [ KAIST ] in KIDS 글 쓴 이(By): iLUSiON (화려한집념) 날 짜 (Date): 2003년 4월 16일 수요일 오전 03시 58분 19초 제 목(Title): Re: [질문] convoluion 적분 구하기 wrong answer conv, convn are for discrete convolutions. for integral convolution, you need basically to take the riemann sum of the integral and then do the discrete convolutions. if X is lognormal, Y= log X is normal. X = e^Y 1/X= e^{-Y} where Y normal. 1/X1 + ... 1/Xn = \sum e^{-Y_i} when Y_i is normal. Compute the Jacobian and you will get your answer. Probably simpler than convolution method - all you need is finguring out the Jacobian which is real easy in MAPLE. Support MAPLE rather than comercial MATHEMATICA will ya. iLUSiON whitepolarcow@hotmail.com |