ha@fisher.UUCP (Ha Nguyen) (06/28/85)
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