The invariant polynomials Cφ κ 1,...,κ r (X1,...,Xr) (Davis [8] and Chikuse [2] with r (r ≥ 2) symmetric matrix arguments have been defined, extending the zonal ...

Local projection methods which yield $C^{(m - 1)}$ piecewise polynomials of order $m + k$ as approximate solutions of a boundary value problem for an $m$th order ...