Ms. Floater et Eg. Quak, Linear independence and stability of piecewise linear prewavelets on arbitrary triangulations, SIAM J NUM, 38(1), 2000, pp. 58-79
In this paper we establish linear independence and stability of certain pie
cewise linear prewavelets over arbitrary bounded triangulations. These prew
avelets are natural generalizations of the locally supported element constr
ucted by Kotyczka and Oswald for an infinite three-directional mesh.