Stable locally supported bases are constructed for the spaces S-d(r)(Delta)
of polynomial splines of degree d greater than or equal to 3r + 2 and smoo
thness r defined on triangulations A, as well as for various superspline su
bspaces. In addition, we show that for r greater than or equal to 1, in gen
eral, it is impossible to construct bases which are simultaneously stable a
nd locally linearly independent.