Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 11/03/84 (WLS Mods); site fisher.UUCP Path: utzoo!watmath!clyde!burl!ulysses!allegra!princeton!astrovax!fisher!ha From: ha@fisher.UUCP (Ha Nguyen) Newsgroups: net.math,net.math.stat Subject: Matrix inversion (Help!!) Message-ID: <690@fisher.UUCP> Date: Fri, 28-Jun-85 09:49:33 EDT Article-I.D.: fisher.690 Posted: Fri Jun 28 09:49:33 1985 Date-Received: Sat, 29-Jun-85 03:13:47 EDT Distribution: net Organization: Princeton University Department of Statistics Lines: 20 Xref: watmath net.math:2108 net.math.stat:116 I am interested in finding n _ __ _ -1 | \ | | A - a /__ x(i). t(x(i)) | |_ i=1 _| where A : pxp non-singular, symmetric matrix x(i) : p-column vetctor t(x(i)) : transpose of x(i). a : real constant For n=1, the above expression can be expressed in terms of A inverse,x,t(x). Does anybody know whether a close form exists for n>1 ? Any reference or hint will be greatly appreciated. Thanks in advance. ha