BattleLemarieWavelet

BattleLemarieWavelet[] represents the Battle–Lemarié wavelet of order 3.

BattleLemarieWavelet[n] represents the Battle–Lemarié wavelet of order n evaluated on equally spaced interval {-10,10}.

BattleLemarieWavelet[n,lim] represents the Battle–Lemarié wavelet of order n evaluated on equally spaced interval {-lim,lim}. 

Please visit the official Wolfram Language Reference for more details and examples on core symbols.