Function: mathouseholder
Section: linear_algebra
C-Name: mathouseholder
Prototype: GG
Help: mathouseholder(Q,v): applies a sequence Q of Householder transforms
 to the vector or matrix v.
Doc: \sidx{Householder transform}applies a sequence $Q$ of Householder
 transforms, as returned by \kbd{matqr}$(M,1)$ to the vector or matrix $v$.
