Yes, they are called trapezoidal matrices. LAPACK Routines that act on them have the TZ code (distinct from the TR code for triangular).
On Thursday, January 15, 2015 at 9:52:08 AM UTC-5, Tamas Papp wrote: > > I think that would be a good solution --- I think that the notion of > triangularity extends well to non-square matrices. > >
