BIB-VERSION:: CS-TR-v2.0 ID:: STAN//CS-TR-65-16 ENTRY:: January 19, 1996 ORGANIZATION:: Stanford University, Department of Computer Science TITLE:: Maximizing a second-degree polynomial on the unit sphere TYPE:: Technical Report AUTHOR:: Forsythe, George E. AUTHOR:: Golub, Gene H. DATE:: February 1965 PAGES:: 36 ABSTRACT:: Let A be a hermitian matrix of order n, and b a known vector in $C^n$. The problem is to determine which vectors make $\Phi (x) = {(x-b)}^H\ A(x-b)$ a maximum or minimum on the unit sphere U = {x : $x^H$x = 1}. The problem is reduced to the determination of a finite point set, the spectrum of (A,b). The theory reduces to the usual theory of hermitian forms when b = 0. NOTES:: [Adminitrivia V1/Prg/19960119] END:: STAN//CS-TR-65-16