Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!pacific.mps.ohio-state.edu!linac!att!pacbell.com!iggy.GW.Vitalink.COM!widener!netnews.upenn.edu!sequoia!hoford From: hoford@sequoia.circ.upenn.edu (John Hoford) Newsgroups: comp.sys.handhelds Subject: Re: Finding roots of Tertiary and above equations? Message-ID: <40686@netnews.upenn.edu> Date: 8 Apr 91 15:38:47 GMT References: <25744@hydra.gatech.EDU> <21858@shlump.nac.dec.com> Sender: news@netnews.upenn.edu Organization: Cardiothoracic Imaging Research Center Lines: 8 Nntp-Posting-Host: sequoia.circ.upenn.edu In article <21858@shlump.nac.dec.com> edp@jareth.enet.dec.com (Eric Postpischil (Always mount a scratch monkey.)) writes: >In short, no. For polynomials up to degree four, there are exact >algebraic solutions. Beyond that, numerical methods must be used. >There are good methods (and the 48 has a good >method built in, for real solutions), but they are not guaranteed to >find all roots. Is this true in the sense that, a solution involving a square root